Abstract
Cambrian genera and species of Agnostina (?Trilobita) found in Russia are revised. Agnostid trilobite species are used as index taxa in chronostratigraphic subdivisions of the traditional Middle and Upper Cambrian in both regional and global stratigraphic scales. The correlation of the regional and international stratigraphic schemes largely depends on the state of knowledge of the regional agnostid fauna. Therefore, an up-to-date revision of this group based on the Russian collections taking into account their global diversity is very timely. For this study we reexamined the type collections of agnostids, including the holotypes of species described by Russian authors. This paper contains new photographic images of the holotypes housed in Russian museums. The compiled data offered solutions for some difficult taxonomic problems of the families Agnostidae, Ptychagnostidae, Peronopsidae, and some genera of Pseudagnostidae, Diplagnostidae. Apart from listing the diversity, this paper serves as the basis for studying the biogeography and evolution of this interesting arthropod group.
Similar content being viewed by others
References
Ahlberg, P., A revision of the Ordovician agnostid trilobite Leiagnostus Jaekel 1909, GFF, 1988, vol. 110, no. 4, pp. 363–370.
Ahlberg, P., Agnostid trilobites from the Lower Ordovician of southern Sweden, Trans. Royal Soc. Edinburgh: Earth Sci., 1992, vol. 83, pp. 539–570.
Ahlberg, P. and Ahlgren, J., Agnostids from the Upper Cambrian of Västergötland, Sweden, GFF, 1996, vol. 118, part 3, pp. 129–140.
Ahlberg, P. and Terfelt, F., Furongian (Cambrian) agnostoids of Scandinavia and their implications for intercontinental correlation, Geol. Mag., 2012, vol. 149, pp. 1001–1012.
Allen, P.M., Jackson, A.A., and Rushton, A.W.A., The stratigraphy of the Mawddach group in the Cambrian succession of North Wales, Proc. Yorkshire Geol. Soc., 1981, vol. 43, part 3, no. 16, p. 295–329.
Alonso, E.N., Malanca, S., and Sureda, R.J., Consideraciones sobre el Ordovicico de la sierra de Aguilar, Jujuy, Argentina, Rev. Inst. Ciencias Geol. Univ. Nac. Jujuy, 1982, vol. 5, pp. 15–37.
Astashkin, V.A., Pegel, T.V., Shabanov, Yu.Ya., Sukhov, S.S., Sundukov, V.M., Repina, L.N., Rozanov, A.Yu., and Zhuravlev, A.Yu., The Cambrian System of the Siberian Platform: Correlation chart and explanatory notes, Int. Union Geol. Sci. Publ., 1991, no. 27, pp. 1–133.
Astashkin, V.A., Pegel, T.V., Repina, L.N., Belyaeva, G.V., Esakova, N.V., Rozanov, A.Yu., Zhuravlev, A.Yu., Osadchaya, D.V., and Pakhomov, N.N., The Cambrian System of the Foldbelts of Russia and Mongolia: Correlation Chart and Explanatory Notes, Int. Union Geol. Sci Publ.,, 1995, no. 32, pp. 1–132.
Balashova, E.A., The first find of the upper Cambrian trilobites in the Russian Platform, Vest. Len. Gos. Univ. Ser. Geol. Geogr., 1963, no 12, pp. 126–128.
Bao, J.-S. and Jago, J.B., Late Cambrian trilobites from near Birch Inler, South–western Tasmania, Paleontology, 2000, vol. 43, no. 5, pp. 881–917.
Blaker, M.R. and Peel, J.S., Lower Cambrian trilobites from North Greenland, Meddel. Grønl., Geosci., 1997, vol. 35, pp. 1–145.
Bognibova, R.T., Middle Cambrian trilobites from the area of Dolgii Mys Mountain (Batenevsky Mountain Range), Tr. Sib. Nauchno–Issled. Inst. Geol. Geofiz. Mineral. Syr., 1965, vol. 34 (Data on the Geology, Geophysics, and Minerals of Siberia: Part 1), pp. 59–74.
Bognibova, R.T., Koptev, I.I., Mikhailova, L.M., Poletaeva, O.K., Romanenko, E.V., Romanenko, M.F., Semashko, A.K., Tomashpol’skaya, V.D., Fedjanina, E.S., and Chernysheva, N.E., Trilobites of the Amgan Age of the Altai-Sayany Region, in Amginskii yarus Altae-Sayanskoi oblasti (Amgan Stage of the Altai-Sayany Region), Novosibirsk: Zap.-Sib. Knizh. Izd., 1971, pp. 82–263.
Borovikov, L.I. and Krys’kov, L.N., Cambrian depositions in the Kendyktas Mountains (southern Kazakhstan), Tr. Vsesoyuz. Nauchno-Issled. Geol. Inst. Nov. Ser., 1963, vol. 94 (Data on Geology and Minerals of the Altai and Kazakhstan), pp. 266–280.
Buchholz, A., Agnostida (Trilobita) aus oberkambrischen Geschieben Mecklenburg/Vorpommenrs (Norddeutschland), Greifswal. Geowissensch. Beitr., 1999, vol. 6, pp. 237–259.
Buchholz, A., Ein Geschiebe der Hypagnostus parvifrons–zone, (B3 Mittel–kambrium), mit feinstratigraphischer Schichtung und seltenen sowie neuen Trilobiten, Arch. Geschieb., 2004a, vol. 3, no. 8/12, pp. 501–524.
Buchholz, A., Homagnostus Howell, 1935 und ähnliche Gattungen der Agnostinae (Trilobita) in oberkambrischen Geschieben aus Mecklenburg und Vorpommern (Norddeutschland), Arch. Geschieb., 2004b, vol. 3, no. 8/12, pp. 537–556.
Capèra, J.C., Courtessole, R., and Pillet, J., Contribution à l’étude de l’Ordovicien inférieur de la Montagne noire: Biostratigraphie et révision des Agnostida, Ann. Soc. Geol. Nord., 1978, vol. 98, pp. 67–88.
Chernysheva, N.E., Cambrian stratigraphy of the Aldan Anteclise and Paleontological Foundation for the Recognition of the Amgan Stage, Tr. Vsesoyuz. Nauchno-Issled. Inst. Geol. Inst. Nov. Ser., 1961, vol. 49, pp. 1–347.
Choi, D.K. and Lee, J.G.L., Occurrence of Glyptagnostus stolidotus Öpik, 1961 (Trilobita, Late Cambrian) in the Machari Formation of Korea, J. Paleontol., 1995, vol. 69, pp. 590–594.
Choi, D.K., Lee, J.G., and Sheen, B.C., Upper Cambrian agnostid trilobites from the Machari Formation, Yongwol, Korea, Geobios, 2004, vol. 37, pp. 159–189.
Clark, T.H., A group of new species of Agnostus from Levis, Quebec, Can. Field–Natur., 1923, vol. 37, no. 7, pp. 121–125.
Cooper, R.A., Jago, J.B., and Begg, J.G., Cambrian trilobites from Northern Victoria Land, Antarctica, and their stratigraphic implications, New Zealand J. Geol. Geophys., 1996, vol. 39, no. 3, pp. 363–387.
Daily, B. and Jago, J.B., The trilobite Lejopyge Hawle and Corda and the Middle–Upper Cambrian boundary, Palaeontology, 1975, vol. 18, no, 3, pp. 527–550.
Danukalova, M.K., Kuz’michev, A.B., and Korovnikov, I.V., The Cambrian of Bennett Island (New Siberian Islands), Stratigr. Geol. Correlation, 2014, vol. 22, no. 4, pp. 347–369.
Datsenko, V.A., Zhurazleva, I.T., Lazarenko, N.P., et al., Biostratigraphiya i fauna kembriiskikh otlozhenii severozapada Sibirskoi platformy (Biostratigraphy and Fauna of the Cambrian of Northwestern Siberian Platform), Leningrad: Nedra, 1968.
Dragunov, V.I., Smirnov, A.L., and Chernysheva, N.E., Lower Paleozoic deposits at the base of the eastern part of the West Siberian Lowland (Eloguiskaya test well), Dokl. Akad. Nauk SSSR, 1967, vol. 172, no. 2, pp. 420–422.
Egorova, L.I., Hsiang, L.W., Lee, S.C., Nan, J.S., and Kuo, C.M., The Cambrian trilobite faunas of Kueichou and western Hunan, Spec. Pap. Inst. Geol. Miner. Res. Stratigr. Palaeontol., 1963, pp. 1–117.
Egorova, L.I., Ivshin, N.K., Pokrovskaya, N.V., Poletaeva, O.K., Repina, L.N., Rosova, A.V., Romanenko, E.V., Sivov, A.G., Tomashpol’skaya, V.D., Fedjanina, E.S., and Chernysheva, N.E., Cambrian System: Description of the index fossils: Phylum Artropoda, Tr. Sib. Nauchno-Issled. Inst. Geol. Geofiz. Mineral. Syr., 1960, vol. 19 (Paleozoic Biostratigraphy of the Sayany-Altai Region: Part1. Lower Paleozoic), pp. 152–253.
Egorova, L.I., Lomovitskaya, M.P., Poletaeva, O.K., and Sivov, A.G., Cambrian System: Trilobita, in Atlas rukovodyashchikh form iskopaemykh fauny i flory Zapadnoi Sibiri (Atlas of the Plant and Animal Index Fossils of Western Siberia), Moscow: Gosgeoltekhizdat, 1955, vol. 1, pp. 102–145.
Egorova, L.I. and Pegel, T.V., New data on the biostratigraphy of reefogenic rocks of Middle Cambrian Mayan Stage in the southeastern Siberian Platform, Tr. Sib. Nauchno–Issled. Inst. Geol. Geofiz. Mineral. Syr., 1979, vol. 270, pp. 72–90.
Egorova, L.I. and Romanenko, E.V., Boundary beds of the Middle and Upper Cambrian of the northeastern Altai, in Granitsy krupnykh podrazdelenii fanerozoya Sibiri (Boundaries of the Large Phanerozoic Divisions in Siberia), Novosibirsk: Tr. Sib. Nauchno-Issled. Inst. Geol. Geofiz. Mineral. Syr., 1982, pp. 56–70.
Egorova, L.I. and Savitzkiy, V.E., Cambrian stratigraphy and biofacies of the Siberian Platform, western Prianabar Region, Tr. Sib. Nauchno-Issled. Inst. Geol. Geofiz. Mineral. Syr., 1969, vol. 43, pp. 1–408.
Egorova, L.I., Shabanov, Yu.Ya., Pegel, T.V, Savitzkiy, V.E., Sukhov, S.S., and Chernysheva, N.E., Maiskii yarus strato tipicheskoi mestnosti (srednii kembrii yugo-vostoka Sibirskoi platformy) (Mayan Stage of the Stratotypic Region: Middle Cambrian of the Southeastern Siberian Platform), Moscow: Nauka, 1982.
Egorova, L.I., Shabanov, Yu.Ya., Rozanov, A.Yu., Savitzkiy, V.E., Chernysheva, N.E., and Shishkin, B.B., Elansky and Kuonamka faciostratotypes of the lower boundary of the Middle Cambrian of Siberia, Tr. Sib. Nauchno-Issled. Inst. Geol. Geofiz. Mineral Syr., 1976, vol. 211, pp. 1–228.
Ergaliev, G.Kh., Trilobity srednego i verkhnego kembriya Malogo Karatau (Trilobites from the Middle and Upper Cambrian of the Lesser Kara-Tau), Almaty: Nauka, 1980.
Ergaliev, G.Kh. and Ergaliev, F.G., Agnostidy srednego i verkhnego kembriya Aksaiskogo gosudarstvennogo geologicheskogo zakaznika v Yuzhnom Kazakhstane (Agnostids from the Middle and Upper Cambrian of the Aksai State Geological Reserve in Southern Kazakhstan), Almaty: Gylym, 2008, part1.
Fatka, O., Kordule, V., and Szabad, M., Stratigraphical distribution of Cambrian fossils in the Příbram–Jince Basin (Barrandian area, Czech Republic), Senckenberg. Leth., 2004, vol. 84, nos. 1/2, pp. 367–389.
Fedjanina, E.S., Trilobites of Orlinogorskaya Formation, Orlinaya Mountain, northeastern Salair, Tr. Inst. Geol. Geofiz. Sib. Otd. Akad. Nauk SSSR, 1977, vol. 313 (Biostratigraphy and Fauna of the Upper Cambrian and Its Boundary Beds), pp. 145–152.
Fedoseev, A.V., Features of distribution of ptychagnostids (trilobites) in the Amydaiskii section of the Amgan Age, Geol. Geofiz., 1999, vol. 40, no. 10, pp. 1411–1424.
Fletcher, T.P., Ovatoryctocara granulata, the key to a global Cambrian stage boundary and the correlation of the Olenellid, Redlichiid and Paradoxidid realms, Spec. Pap. Palaeontol., 2003, vol. 70, pp. 73–102.
Fletcher, T.P., Theokritoff, G., Lord, G.S., and Zeoli, G., The early Paradoxidid harlani trilobite fauna of Massachusetts and its correlatives in Newfoundland, Morocco, and Spain, J. Paleontol., 2005, vol. 79, no. 2, pp. 312–336.
Fortey, R.A., The Ordovician trilobites of Spitsbergen: Ill. Remaining trilobites of the Valhallfonna Formation. Skrifter Nr. 171, Oslo: Norsk Polarinstitutt, 1980.
Gogin, I.Ya. and Pegel, T.V., Trilobites of the Middle and Upper Cambrian of the western Sette–Daban, in Atlas zonal’nykh kompleksov vedushchikh grupp rannepaleozoiskoi fauny severa Rossii (Atlas of Zonal Assemblages of Key Groups of Early Paleozoic Fauna of Northern Russia), St. Petersburg: Vseross. Nauchno-Issled. Geol. Inst., 1997, pp. 100–132.
Harrington, H.J., Sobre las faunas del Ordoviciano Inferior del Norte Argentino, Rev. Mus. Plata (Nueva Ser.), Sec. Paleontol., 1938, no. 1, pp. 209–289.
Harrington, H.J. and Leanza, A.F., Ordovician trilobites of Argentina, Spec. Publ. Univ. Kansas, Dept. Geol., 1957, part 1, pp. 1–276.
Hawle, I. and Corda, A.J.C., Monographie der böhmischen Trilobiten, Prague, 1847, 176 p.
Hinz–Schallreuter, I. and Buchholz, A., Mittelkambrische Agnostiden von Bornholm, Arch. Geschieb., 2004, vol. 3, nos. 8/12, pp. 525–536.
Holm, G. and Westergård, A.H., A Middle Cambrian fauna from Bennet Island, Mem. de l’Acad. Sci. l’URSS, Clas. Phys.-Matem., 1930, vol. 21, no. 8, pp. 5–25.
Hong, P.S., Lee, J.G., and Choi, D.K., Trilobites from the Lejopyge armata Zone (Upper Middle Cambrian) of the Machari Formation, Yongwol Group, Korea, J. Paleontol., 2003, vol. 77, no. 5, pp. 895–907.
Howell, B.F., New Middle Cambrian agnostian trilobites from Vermont, J. Paleontol., 1935a, vol. 9, no. 3, pp. 218–220.
Howell, B.F., Some New Brunswick Cambrian agnostians, Bull. Wagner Inst. Sci., 1935b, vol. 10, no. 2, pp. 13–17.
Howell, B.F., Cambrian and Ordovician trilobites from Herault, southern France, J. Paleontol., 1935c, vol. 9, no. 3, pp. 222–238.
Howell, B.F., Cambrian Centropleura vermontensis fauna of Northern Vermont, Bull. Geol. Soc. Am., 1937, vol. 48, no. 8, pp. 1147–1209.
Huang, Y.-z., Yuan, J.-l., Peronopsis of Early–Middle Cambrian Kaili Area, Guizhou, Acta Paleontol. Sin., 1994, vol. 33, no. 3, pp. 295–304.
Hupé, P., Contribution à l'étude du Cambrien inférieur et du Précambrian III de l’Anti–Atlas Marocain: Direction de la Production Industrielle et des Mines, Division des Mines et de la Géologie, Service Géologique, Notes Mém., 1953, vol. 103, pp. 1–402.
Hutchinson, R.D., Cambrian stratigraphy and trilobite faunas of southern Newfoundland, Geol. Surv. Can., 1962, bull. 88, pp. 1–156.
International Code of Zoological Nomenclature, London: Intern. Trust Zool. Nomencl., 1999.
Ivshin, N.K., Srednekembriiskie trilobity Kazakhstana (Middle Cambrian Trilobites of Kazakhstan), part 1: Boshchekul’skii faunisticheskii gorizont (Boshchekul’ Faunal Regional Stage), 1953, Almaty: Akad. Nauk Kaz. SSR, 226 p.
Ivshin, N.K., Verkhnekembriyskie trilobity Kazakhstana (Upper Cambrian Trilobites of Kazakhstan), part 1: Kuyandinskii faunisticheskii gorizont mezhdurech’ya Olenty–Shiderty (Kuyandinskii Faunal Regional Stage in the Olenty–Shiderty Area), Almaty: Akad. Nauk Kaz. SSR, 1956, 97 p.
Jaekel, O., Uber dei Agnostiden, Zeitschdeutsch. Geol. Gesellsch., 1909, vol. 61, pp. 380–401.
Jago, J.B., Late Middle Cambrian agnostid trilobites from north–western Tasmania, Palaeontology, 1976, vol. 19, part 1, pp.133–172.
Jago, J.B. and Brown, A.V., Late Middle Cambrian trilobites from Trial Ridge, southwestern Tasmania, Pap. Proc. R. Soc. Tasm., 2001, vol. 135, pp. 1–14.
Jago, J.B. and Cooper, R.A., A Glyptagnostus stolidotus trilobite fauna from the Cambrian of northern Victoria Land, Antarctica, New Zealand J. Geol. Geophys., 2005, vol. 48, no. 4, pp. 661–681.
Jell, P.A. and Adrain, J.M., Available generic names for trilobites, Mem. Queensland Mus., 2002, vol. 48, no. 2, pp. 331–553.
Kobayashi, T., The Cambro–Ordovician shelly faunas of South America, J. Fac. Sci. Tokyo Univ. Sec. 4, 1937, vol. 4, pp. 369–522.
Kobayashi, T., On the agnostids: Part. 1, J. Fac. Sci. Imp. Univ. Tokyo, Sect. II, 1939, vol. 5, no. 5, pp. 1–198.
Korobov, M.N. and Yankauskas, T.V., Middle Cambrian trilobite in the ancient rocks of Moscow Syneclise (Yaroslavl Region), Dokl. Akad. Nauk SSSR, Geol., 1980, vol. 262, no. 5, pp. 677–678.
Koroleva, M.N., Trilobity ordovika severo-vostochnogo Kazahstana (Ordovician Trilobites of Northeastern Kazakhstan), Moscow: Nedra, 1982, 192 p.
Korovnikov, I.V., Pegel, T.V., and Shabanov, Yu. Ya., New trilobite records from the Middle and Upper Cambrian of the left bank of the Yenisei River (based on materials of well Vostok-1 drilling)), in Regional’naya geologiya. Stratigrafiya i paleontologiya dokembriiskikh i nizhnepaleozoiskikh otlozhenii Sibiri (Regional Geology. Stratigraphy and Paleontology of Precambrian and Lower Paleozoic Strata in Siberia), Novosibirsk: Sib. Nauchno-Issled. Inst. Geol. Geofiz. Mineral. Syr., 2010, pp. 93–110.
Korovnikov, I.V. and Shabanov, Yu.Ya., Trilobites from the boundary beds of the Lower and Middle Cambrian of the stratotypic section on the Molodo River (eastern Siberian Platform), in Razrezy kembriya Sibirskoi platformy–kandidaty v stratotipy podrazdelenii Mezhdunarodnoi stratigraficheskoi shkaly (stratigrafiya i paleontologiya). Materialy k 13-i Mezhdunarodnoi polevoi konferentsii rabochei gruppy po yarusnomu deleniyu kembriya (Sections of the Cambrian of the Siberian Platform–Candidates for Stratotypes of Divisions of the International Stratigraphical Chart (Stratigraphy and Paleontology): Materials to the 13th International field conference of the Working Group for the Stage Division of the Cambrian), Novosibirsk: Sib. Otd. Ross. Akad. Nauk, 2008, pp. 71–104.
Lake, P., A Monograph of the British Cambrian trilobites: Part 1, Palaeontogr. Soc., 1906, pp. 1–28.
Laurie, J.R., Revision of some Australian Ptychagnostinae (Agnostida, Cambrian), Alcheringa, 1988, vol. 12, pp. 169–205.
Laurie, J.R., Revision of species of Goniagnostus Howell and Lejopyge Corda from Australia (Agnostida, Cambrian), Alcheringa, 1989, vol. 13, pp. 175–191.
Laurie, J.R., On the Middle Cambrian agnostoid species Agnostus fallax Linnarsson, 1869, Alcheringa, 1990, vol. 14, pp. 317–324.
Laurie, J.R., Early Middle Cambrian trilobite faunas from NTGS Elkedra 3 corehole, Southern Georgina basin, Northern Territory, Mem. Assoc. Austral. Paleontol., 2004, vol. 30, pp. 221–260.
Lazarenko, N.P., Some Upper Cambrian trilobites from the northwestern Siberian Platform, in Sbornik statey po paleontologii i biostratigrafii (Collected Works on Paleontology and Biostratigraphy), Leningrad: Nauchno-Issled. Inst. Geol. Ark., 1960, vol. 20, pp. 12–44.
Lazarenko, N.P., Biostratigraphy and certain new trilobites from the Upper Cambrian of the Olenek Uplift and Kharaulakh Mountains, Uch. Zap. Nauchno-Issled. Inst. Geol. Ark. Paleontol. Biostratigr., 1966, vol. 11, pp. 33–78.
Lazarenko, N.P., Gogin, I.Ya., Pegel, T.V., and Abaimova, G.P., The Khos-Nelege River section of the Ogon’or Formation: A potential candidate for the GSSP of Stage 10, Cambrian System, Bull. Geosci., 2011, vol. 86, no. 3, pp. 555–568.
Lazarenko, N.P., Gogin, I.Ya., Pegel, T.V., Sukhov, S.S., Abaimova, G.P., Egorova, L.I., Fedorov, A.B., Raevskaya, E.G., and Ushatinskaya, G.T., Cambrian stratigraphy of the northeastern Siberian Platform and potential stratotypes of lower boundaries of the proposed Upper Cambrian Chekurovkian and Nelegerian stages in the Ogon’or Formation section at the Khos-Nelege River; The boundaries are defined by the FADs of Agnostotes orientalis and Lotagnostus americanus, in Cambrian System of the Siberian Platform: Part 2: Northeast of the Siberian Platform, Moscow–Novosibirsk: Paleontol. Inst. Ross. Akad. Nauk, 2008a, pp. 60–139
Lazarenko, N.P. and Nikiforov, N.I., Trilobite assemblages from the Upper Cambrian deposites, Kulyumbe River (northwestern Siberian Platform), Uch. Zap. Nauchno- Issled. Inst. Geol. Ark. Paleontol. Biostratigr., 1968, vol. 23, pp. 20–80.
Lazarenko, N.P., Pegel, T.V., Sukhov, S.S., Abaimova, G.P., and Gogin, I.Ya., Type section for the Upper Cambrian of the Siberian Platform As a candidate for GSSP (Khos-Nelege River, western Yakutia, Russia), in Materialy k 13 Mezhdunarodnoy polevoy konferentsii rabochey gruppy po yarusnomu deleniyu kembriya: Razrezy kembriya Sibirskoi platformy–kandidaty na GSSP (13th International Conference of the Working Group on the Stage Division of the Cambrian: Sections of the Cambrian of the Siberian Platform As Candidates for GSSP), Yakutsk, Novosibirsk: Sib. Otd. Ross. Akad. Nauk, 2008b, pp. 3–58.
Lee, J.G. and Choi, D.K., Late Cambrian trilobites from the Machari Formation, Yeongweol–Machari area, Korea, J. Paleontol. Soc. Korea, 1995, vol. 11, no. 1, pp. 1–46.
Lermontova, E.V., Class Trilobita, in Atlas rukovodyashchikh form iskopaemykh faun SSSR (Atlas of Index Taxa of Fossil Faunas of the USSR), vol. 1: Kembrii (Cambrian), Moscow–Leningrad: Gosgeolizdat, 1940, pp. 112–157.
Lermontova, E.V., Verkhnekembriiskie trilobity i brakhiopody Boshche–Kulya (severo-vostochnyi Kazakhstan) (Upper Cambrian Trilobites and Brachiopods of Boshche-Kul’), Moscow: Gosgeolizdat, 1951a.
Lermontova, E.V., Nizhnekembriiskie trilobity i brakhiopody Vostochnoy Sibiri (Lower Cambrian Trilobites and Brachiopods of Eastern Siberia), Moscow: Gosgeolizdat, 1951b.
Lermontova, E.V., Srednekembriiskie trilobity i gastropody Shody–Mira (Yuzhnaya okraina Ferganskoy kotloviny) (Middle Cambrian Trilobites and Gastropods of Shody–Mir: Southern Periphery of the Fergana Depression), Moscow: Gosgeolizdat, 1951c.
Liñán, E., Álvaro, I., Gozalo, R., Gámez-Vintaned, J.A., and Palacios, T., El Cámbrico Medio de la Sierra de Córdoba (Ossa–Morena, S de España): Trilobites y paleoichnología: Implicaciones bioestratigráficas y paleoambientales, Rev. Españ. Paleontol., 1995, vol. 10, no. 2, pp. 219–238.
Linnarsson, J.G.O., Om Vestergotlands Cambriska och Siluriska aflagringar, Kongl. Sven, Vetenskaps–Acad. Handlingar., 1869, vol. 8, no. 2, pp. 1–89.
Lisogor, K.A., Trilobites from the Tremadocian beds of the Kyrgyz Mountain Range, Nauch. Tr. Kaz. Politekh. Inst., 1971, pp. 179–185.
Lisogor, K.A., Biostratigraphy and trilobites from the Upper Cambrian and Tremadocian of the Malyi Karatau (southern Kazakhstan), Tr. Inst. Geol. Geofiz. Sib. Otd. Akad. Nauk SSSR, 1977, vol. 313 (Biostratigraphy and Fauna from the Upper Cambrian and Boundary Strata: New Data from the Asiatic Part of the USSR), pp. 197–265.
Lisogor, K.A., Rosov, S.N., and Rosova, A.V., Correlation of Middle Cambrian deposits of the Lesser Karatau and Siberian Platform based on trilobites, Tr. Inst. Geol. Geofiz. Sib. Otd. Akad. Nauk SSSR, 1988, vol. 720 (Cambrian of Siberia and Central Asia), pp. 54–82.
Liu, Y-r., Trilobita, in Paleontological Atlas of Hunan, Beijing: Geol. Pabl. House, 1982, pp. 290–346
Lochman, C. and Duncan, D., Early Upper Cambrian faunas of central Montana, Geol. Soc. Am. Spec. Papers, 1944, vol. 54, pp. 1–181.
Lu, Y., Cambrian trilobites, in Handbook of Index Fossils of South China, Wang, Y., Ed., Beijing: Sci. Press, 1964, pp. 26–39.
Lu, Y. and Lin, H., Late Cambrian and earliest Ordovician trilobites of Jiangshan–Changshan area, Zhejiang, in Stratigraphy and Palaeontology of Systematic Boundaries in China, Cambrian–Ordovician Boundary, Hefei: Anhui Sci. Techn. Publ. House, 1984, vol. 1, pp. 45–164.
Lu, Y. and Lin, H., Late Late Cambrian and earliest Ordovician trilobites of Jiangshan–Changshan area, Zhejiang, in Stratigraphy and Palaeontology of Systematic Boundaries in China, Cambrian–Ordovician Boundary, Hefei: Anhui Sci. Techn. Publ. House, 1989, vol. 1, pp. 45–143
Lu, Y., Zhang, W., Zhu, Z., Qian, Y., and Xiang, L., Trilobites of China, Beijing: Sci. Press, 1965.
Lu, Y., Zhang, W., Qian, Y., Zhu, Z., Lin. H., Zhou, Z., Zhang, S., and Yuan J., Cambrian trilobites, in Handbook of Stratigraphy and Palaeontology, Beijing: Southwest China Sci. Press, 1974, pp. 82–107.
Ludvigsen, R., Upper Cambrian and Lower Ordovician trilobite biostratigraphy of the Rabbitkettle Formation, western district of Mackenzie, Life Sci. Contrib., Roy. Ontario Mus., 1982, pp. 1–134.
Ludvigsen, R., Westrop, S.R., and Kindle, C.H., Sunwaptan (Upper Cambrian) trilobites of the Cow Head Group, western Newfoundland, Canada, Palaeontogr. Can., 1989, vol. 6, pp. 1–175.
Moore, R.C., Ed., Systematic descriptions of Trilobita, in Treatise on Invertebrate Paleontology: Part. O. Arthropoda 1, Lawrence: Univ. Kansas Press, 1959, pp. O170–O526.
Müller, K. and Walossek, D., Morphology, ontogeny, and life habit of Agnostus pisiformis from the Upper Cambrian of Sweden, Foss. Strata, 1987, vol. 19, pp. 1–123.
Naimark, E., Ontogeny of Agnostida, Palaeoworld, 2006, vol. 261, no. 15, pp. 315–327.
Naimark, E., Comparative ontogeny of different species of agnostina, Paleontol. J., 2007, vol. 41, no. 1, pp. 69–78.
Naimark, E., Morphogenesis in the genus Peronopsis Hawle et Corda (Agnostina), Paleontol. J., 2008, vol. 42, no. 4, pp. 389–400.
Naimark, E., Hundred species of the genus Peronopsis Hawle et Corda, 1847, Paleontol. J., 2012, vol. 46, no. 9, pp. 945–1057.
Naimark, E., Revision of Eurudagnostus Lermontova (Agnostida, ?Trilobita), Paleontol. J., 2014, vol. 48, no. 2, pp. 166–176.
Naimark, E., Revision of Rseudorhaptagnostus Lermontova (Agnostida, ?Trilobita), Paleontol. J., 2016, vol. 50, no. 1, pp. 54–68.
Nielsen, A.T., A review of Ordovician agnostid genera (Trilobita), Transact. Roy. Soc. Edinburgh Erath Sci., 1997, vol. 87, pp. 463–501.
Ogienko, L.V. and Garina, S.Yu., Stratigrafiya i trilobity kembriya Sibirskoi platformy (Cambrian Stratigraphy and Trilobites of the Siberian Platform), Moscow: Nauch. Mir, 2001.
Öpik, A.A., The geology and palaeontology of the headwaters of the Burke River, Queensland, Bull. Bur. Miner. Res. Austral., Geol. Geophys., 1961a, vol. 53, pp. 1–249.
Öpik, A.A., Alimentary Caeca of Agnostids and other Trilobites, Paleontology, 1961b, vol. 3, pp. 410–438.
Öpik, A.A., Early Upper Cambrian fossils from Queensland, Bull. Bur. of Min. Res. Australia, Geol. Geophys., 1963, vol. 64, pp. 1–133.
Öpik, A.A., The Myndyallan Fauna of North-Western Queensland, Bull. Bur. of Min. Res., Geol. Geophys., 1967, vol. 74, pp. 1–399.
Öpik, A.A., Middle Cambrian agnostids: Systematics and biostratigraphy, Bull. Bur. of Min. Res. Australia, Geol. Geophys., 1979, vol. 172, pp. 1–187.
Palmer, A.R., An appraisal of the Great Basin Middle Cambriam trilobites, described before 1900, US Geol. Surv. Prof. Pap., 1954, vol. 264–D, pp. 1–86.
Palmer, A.R., Trilobites of the Upper Cambrian Dunderberg Shale, Eureka District, Nevada, US Geol. Surv. Prof. Pap., 1960, vol. 334–C, pp. 1–109.
Palmer, A.R., Glyptagnostus and associated trilobites in the United States, US Geol. Surv. Prof. Pap, 1962, vol. 374–F, pp. 1–63.
Palmer, A.R., Cambrian trilobites of East–central Alaska, US Geol. Survey Prof. Pap., 1968, vol. 559–B, pp. 1–115.
Palmer, A.R. and Gatehause, C.G., US Geol. Survey Prof. Pap., 1972, vol. 456–D, pp. 1–37.
Pegel, T.V., New species of the Middle Cambrian trilobites from South Yakutia, Tr. Sib. Nauchno-Issled. Inst. Geol. Geofiz. Mineral. Syr., 1978, vol. 260 (New Data on the Stratigraphy and Paleontology of Siberia), pp. 84–90.
Pegel, T.V., Evolution of trilobite biofacies in Cambrian Basins of the Siberian Platform, J. Paleontol., 2000, vol. 74, no. 6, pp. 1000–1019.
Pegel, T.V., The correlation of the different facies type sections of late Middle Cambrian in the Siberian Platform, in Regional’naya geologiya. stratigraphya i paleontologiya dokembriya i nizhnego paleozoya Sibiri (Regional Geology, Stratigraphy and Paleontology of the Precambrian and Lower Paleozoic of Siberian, Novosibirsk: Tr. Sib. Nauchno–Issled. Inst. Geol. Geofiz. Mineral. Syr., 2010, pp. 110–123.
Pegel, T.V., Biofacies and age of Cambrian trilobite associations of the Diringde reef complex (northern Siberian Platform, Russia), Bull. Geosci., 2014, vol. 89, no. 2, pp. 335–345.
Pegel, T.V., Egorova, L.I., Shabanov, Yu.,Ya., Korovnikov, I.V., Luchinina, V.A., Salikhova, A.K., Sundukov, V.M., Fedorov, A.B., Zhuravlev, A.Yu., Parkhaev, P.Yu., and Demidenko, Yu.E. Stratigrafiya neftegazonosnykh basseinov Sibiri (v devyati knigakh): kembrii Sibirskoi platformy (Stratigraphy of oil and gas basins of Siberia) (in nine books): Cambrian of Siberian Platform, vol. 2: Paleontologiya (Paleontology), Kontorovich, A.E., Ed., Novosibirsk: Inst. Neftegaz. Geol. Geofiz. Sib. Otd. Ross. Akad. Nauk, 2016.
Pegel, T.V. and Sukhov, S.S., Cambrian biostratigraphy and sedimentary evolution of the Siberian Platform, in Proceedings of the 3rd IGCP 591 Annual Meeting, Lund, 9–19 June 2013, 2013, pp. 260–261.
Pek, I. and Vanek, J., Revision of the genera Peronopsis Hawle et Corda, 1847 and Diplorrhina Hawle et Corda, 1847 (Trilobita) from the Middle Cambrian of Bohemia, Vest. Usrted. Ustavu Geol., 1971, vol. 46, no. 5, pp. 269–275
Peng, S.C., Upper Cambrian biostratigraphy and trilobite faunas of the Cili Taoyuan area, north–western Hunan, China, Assoc. Australas. Palaeontol. Mem., 1992, vol. 13, pp. 1–119.
Peng, S.C. and Babcock, L.E., Two Cambrian agnostoid trilobites, Agnostotes orientalis (Kobayashi, 1935) and Lotagnostus americanus (Billings, 1860): Key species for defining global stages of the Cambrian System, Geosci. J., 2005, vol. 9, pp. 107–115.
Peng, S., Hughes, N.C., Heim, N.A., Sell, B.K., Zhu, X.-J., Myrow, P.M., and Parcha, S.K., Cambrian trilobites from the Parahio and Zanskar valleys, Indian Himalaya, Paleontol. Soc. Mem., 2009, vol. 71, pp. 1–95.
Peng, S. and Robison, R.A., Agnostid biostratigraphy across the Middle–Upper Cambrian boundary in Unan, China, Paleontol. Soc. Mem., 2000, vol. 53, pp. 1–104.
Petrunina, Z.E. and Gabova, M.F., Trilobites of the Upper Cambrian from Kuznetsk Alatau and Salair (Ust’- Kul’bichskii Regional Stage), in Paleontologiya Kuzbassa (Paleontology of the Kuzbass), 2008, vol. 1, pp. 1–114.
Pokrovskaya, N.V., Agnostidy srednego kembriya Yakutii (Agnostida from the Middle Cambrian of Yakutia), Moscow: Akad. Nauk SSSR, 1958.
Pokrovskaya, N.V., Class Trilobita: order Miomera, in Osnovy paleontologii (Fundamentals of Paleontology), Chernysheva, N.E., Ed., Moscow: Gosnauchtekhizdat, 1960, pp. 54–61.
Poletaeva, O.K. and Romanenko, E.V., Some trilobites from the Middle and Late Cambrian of Altai, Paleontol. J., 1970, no. 2, pp. 72–83.
Poulsen, Ch., Fossils from the Late Middle Cambrian Bolaspidella Zone of Mendoza, Argentina, Mat. Fys. Medd. Dan. Vid. Selsk., 1960, vol. 32, no. 11, pp. 1–42.
Pratt, B.R., Trilobites of the Marjuman and Steptoean stages (Upper Cambrian), Rabibitkettle Formation, southern Mackenzie Mountains, northwest Canada, Paleontogr. Can., 1992, no. 9, pp. 1–179.
Qiu, H., Lu, Y., Zhu, Z., Bi, D., Lin, T., Zhang, Q., Qian, Y., Ju, T., Han, N., and Wei, X., Trilobita, in Palaeontological Atlas of East China, part 1: Early Paleozoic, Beijing: Geol. Publ. House, 1983, pp. 28–254.
Rasetti, F., Middle Cambrian trilobites from the conglomerates of the Quebec (exclusive of the Ptychopariidea), J. Paleontol., 1948, vol. 22, no. 3, pp. 45–52.
Rasetti, F., Middle Cambrian Stratigraphy and Faunas of the Canadian Rocky Mountains, Smithson. Misc. Coll., 1951, vol. 116, no, 5, pp. 3–276.
Rasetti, F. and Teokritoff, G., Lower Cambrian agnostid trilobites of North America, J. Paleontol., 1967, vol. 41, no. 1, pp. 188–196.
Repina, L.N., Biofacies of trilobites in Early Cambrian of the Siberian Platform, in Sreda i zhizn’ v geologicheskom proshlom. Paleobiogeografiya i paleoekologiya (Life and Environments in the Geological Past: Paleobiogeography and Paleoecology), Novosibirsk: Nauka, 1983, pp. 54–76.
Repina, L.N., Types of trilobite associations and their relationships with landscapes in the Early Cambrian sea of the Siberian Platform, in Sreda i zhizn’ v geologicheskom proshlom. Paleolandshafty morei i kontinentov (Life and Environments in the Geological Past: Paleolanscapes of Oceans and Continents), Novosibirsk: Nauka, 1987, pp. 13–26.
Repina, L.N., Petrunina, Z.E., and Hairullina, T.I., Trilobites, in Stratigrafiya i fauna nizhnego paleozoya severnykh predgorii Turkestanskogo i Alaiskogo khrebtov (yuzhniy Tyan’–Shan’) (Stratigraphy and Fauna of the Lower Paleozoic of the Northern Foothills of Turkestan and Alai Mountain Ranges (Southern Tien Shan)), Novosibirsk: Nauka, Sib. Otd., 1975, pp. 100–233.
Resheniya Vsesoyuznogo stratigraficheskogo soveshchaniya po dokembriyu, paleozoyu i chetvertichnoi sisteme Srednei Sibiri, chast’ 1 (verkhnii proterozoi i nizhnii paleozoi) (Resolution of All–Union Stratigraphical Meeting on the Precambrian, Paleozoic, and Quaternary System of Middle Siberia: Part1. Upper Proterozoic and Lower Paleozoic), Novosibirsk: Sib. Nauchno–Issled. Inst. Geol. Geofiz. Mineral. Syr., 1983.
Resser, Ch.E., Middle Cambrian fossils from Pend Oreille Lake, Idaho, Smithson. Miscell. Coll., 1938, vol. 97, no 3, pp. 1–12.
Resser, C.E. and Howell, B.F., Lower Cambrian Olenellus Zone of the Appalachians, Geol. Soc. Am., 1938, vol. 49, pp. 195–248.
Robison, R.A., Middle Cambrian faunas from Western Utah, J. Paleontol., 1964, vol. 38, no. 3, pp. 79–92.
Robison, R.A., Some Middle Cambrian agnostoid trilobites from western North America, J. Paleontol., 1982, vol. 56, pp. 132–160.
Robison, R.A., Cambrian Agnostida of North America and Greenland: Part1. Ptychagnostidae, Univ. Kansas Paleontol. Contrib., 1984, vol. 109, pp. 1–59.
Robison, R.A., Triloibites of the Holm Dal Formation (Late Middle Cambrian), central North Greenland, Meddr. Grønland, Geosci., 1988, vol. 20, pp. 23–103.
Robison, R.A., Agnostoid trilobites from the Henson Gletcher and Kap Stanton formations (Middle Cambrian), North Greenland, Bull. Grønland. Geol. Unders., 1994, vol. 169, pp. 25–77.
Robison, R.A., Revision of the Middle Cambrian trilobite Agnostus acadicus Hartt, J. Paleontol., 1995, vol. 69, no. 1, pp. 302–306.
Romanenko, E.V., Cambrian trilobites from the Bol’shaya Isha River section (northeastern Altai), Tr. Inst. Geol. Geofiz. Sib. Otd. Akad. Nauk SSSR, 1977, vol. 313 (Biostratigraphy and Fauna of the Upper Cambrian and Its Boundary Beds), pp. 161–183.
Romanenko, E.V., Trilobites of the Middle/Upper Cambrian boundary in Altai, Paleontol. J., 1985, no. 4, pp. 54–63.
Romanenko, E.V., New trilobites from the Cambrian phosphatic deposits in Altai, Paleontol. J., 1988, no. 2, pp. 43–53.
Romanenko, M.F. and Romanenko, E.V., Some aspects of paleogeography and trilobites of the Cambrian from Gornyi Altai, Izv. Altai. Otd. Geogr. Obshch. SSSR, 1967, vol. 8, pp. 62–96.
Rosova, A.V., Upper Cambrian trilobites of Salair (Tolstochikhinskaya Formation), Tr. Inst. Geol. Geofiz. Sib. Otd. Akad. Nauk SSSR, 1960, vol. 5, pp. 1–116.
Rosova, A.V., Biostratigraphic scheme for the upper Middle Cambian and Upper Cambrian, and new Upper Cambrian trilobites, Geol. Geophys., 1963, no. 9, pp. 3–19.
Rosova, A.V., Biostratigraphiya i opisanie trilobitov srednego i verkhnego kembriya severo-zapada Sibirskoy platformy (Middle and Upper Cambrian Biostratigraphy and Descriptions of Trilobites from the Northwestern Siberian Platform), Moscow: Nauka, 1964, pp. 3–148.
Rosova, A.V., Upper Cambrian and Lower Ordovician biostratigraphy and trilobites of the northwestern Siberian Platform, Tr. Inst. Geol. Geofiz. Sib. Otd. Akad. Nauk SSSR, 1968, vol. 36, pp. 1–196.
Rosova, A.V., Some Upper Cambrian and Lower Ordovician trilobites from the Rybnaya, Khantaika, Kureika, and Letnyaya river basins, Tr. Inst. Geol. Geofiz. Sib. Otd. Akad. Nauk SSSR, 1977, vol. 313 (Biostratigraphy and Fauna of the Upper Cambrian and Its Boundary Beds), pp. 54–84.
Rosova, A.V., Upper Cambrian and Lower Ordovician biogeography of the Siberian Platform (based on trilobites), in Sreda i zhizn’ v geologicheskom proshlom. Voprosy ekostratigrafii (Life and Environments in the Geological Past: Questions of Ecostratigraphy), Novosibirsk: Nauka, 1979, pp. 87–99.
Rusconi, C., Trilobites Cambricos del Cerro Pelado (Mendoza), Bull. Paleonol. Buenos Aires, 1951, no. 24, pp. 303–306.
Rushton, A.W.A., The Cambrian trilobites from the Purley Shales of Warwickshire, London: Palaeontogr. Soc., 1966.
Rushton, A.W.A., Fossils from the Middle–Upper Cambrian transition in the Nuneaton District, Palaeontology, 1978, vol. 21, part 2, pp. 245–283.
Rushton, A.W.A., A review of the Middle Cambrian Agnostida from the Abbey Shales, England, Alcheringa, 1979, vol. 3, nos. 1–2, pp. 43–61.
Rushton, A.W.A., Revision of the Furongian agnostoid Lotagnostus trisectus (Salter), Mem. Assoc. Australas. Palaeontol., 2009, vol. 37, pp. 273–279.
Rushton, A.W.A. and Weidner, T., The Middle Cambrian paradoxidid trilobite Hydrocephalus from Jämtland, central Sweden, Acta Geol. Polon., 2007, vol. 57, no. 4, pp. 391–401.
Savitzkiy, V.E., Evtushenko, V.M., Egorova, L.I., Kontorovich, A.E., and Shabanov, Yu.Ya., Cambrian of the Siberian Platform (Yudoma–Olenek type of section: Kuonamka complex of deposits), Tr. Sib. Nauchno-Issled. Inst. Geol. Geofiz. Mineral Syr., 1972, vol. 130, pp. 1–198.
Schmidt, F., Ueber einige neue ostibirische Trilobiten und vermandte Thierformen, Bull. Acad. Imp. Sci. St.-Petersburg, 1886, vol. 30, no, 4, pp. 501–512.
Shabanov, Yu.Ya., Astashkin, V.A., Pegel, T.V., Egorova, L.I., Zhuravleva, I.T., Pelman, Yu.L., Sundukov, V.M., Stepanova, M.V., Sukhov, S.S., Fedorov, A.B., Shishkin, B.B., Vaganova, N.V., Ermak, V.I., Ryabukha, K.V., Yadrenkina, A.G., Abaimova, G.P., Lopushinskaya, T.V., Sychev, O.V., and Moskalenko, T.A., Nizhnii paleosoi yugo-zapadnogo sklona Anabarskoi anteklizy (po materialam bureniya) (Lower Paleozoic of the Southeastern Slope of the Ananbar Anteclyse Based on Drilling Records), Novosibirsk: Sib. Otd. Akad. Nauk SSSR, 1987.
Shabanov, Yu.Ya, Korovnikov, I.V., Pereladov, V.S., and Fefelov, A.F., Excursion 1a: The traditional Lower–Middle Cambrian boundary in the Kuonamka Formation of the Molodo River section (the southeastern slope of the Olenek Uplift of the Siberian Platform) proposed as a candidate for GSSP of the lower boundary of the Middle Cambrian and its basal (Molodian) stage, defined by the FAD of Ovatoryctocara granulata, in The Cambrian System of the Siberian Platform: Part 2. North-East of the Siberian Platform, Moscow–Novosibirsk: Paleontol. Inst. Ross. Akad. Nauk SSSR, 2008, pp. 8–59.
Shaw, A.B., The palaeontology of northwestern Vermont:1. New Late Cambrian trilobites, J. Paleontol., 1951, vol. 25, pp. 97–114.
Shergold, J.H., Late Upper Cambrian trilobites from the Gola Beds, Western Queensland, Austral. Bureau Mineral Res. Geol. Geophys., 1971, vol. 112, pp. 1–127.
Shergold, J.H., Late Upper Cambrian trilobites from the Gola Beds, western Queensland, Austral. Bureau Mineral Res. Geol. Geophys., 1972, vol. 112, pp. 1–127.
Shergold, J.H., Late Cambrian and Early Ordovician trilobites from the Burke River Structural Belt, western Queensland, Austral. Bureau Mineral Res. Geol. Geophys., 1975, vol. 153, part 1, pp. 1–246.
Shergold, J.H., Classification of the trilobite Pseudagnostus, Palaeontology, 1977, vol. 20, no. 1, pp. 69–100.
Shergold, J.H., Late Cambrian trilobites from the Chatsworth limestone: Western Queensland, Austral. Bureau Mineral Res. Geol. Geophys., 1980, vol. 186, pp. 1–111.
Shergold, J.H., Idamean: Late Cambrian trilobites, Burke River Structural Belt, western Queensland, Austral. Bureau Mineral Res. Geol. Geophys., 1982, vol. 187, pp. 1–69.
Shergold, J.H. and Laurie, J.R., Ptychagnostus Jaekel, 1909 and Glyptagnostus Whitehouse, 1936 (Trilobita): Proposed conservation of accepted usage, Bull. Zool. Nomencl., 1991, vol. 48, no 3, pp. 200–202.
Shergold, J.H. and Laurie, J.R., Suborder Agnostina Salter, 1864, in Treatise on Invertebrate Paleontology: Part O: Arthropoda 1: Trilobita 1, Lawrence: Univ. Kansas Press, 1997, pp. 331–383.
Shergold, J.H., Laurie, J.R., and Sun, X., Classification and review of the trilobite, Order Agnostida Salter, 1864: An Australian perspective, Canberra: Austral. Gover. Publ. Serv., 1990.
Shergold, J.H. and Sdzuy, K., Cambrian and Early Ordovician trilobites from Sultan Dag, central Turkey, Senckenb. Letheae, 1984, vol. 65, nos. 1/3, pp. 51–135.
Shergold, J.H. and Webers, G.F., Late Dresbachian and other trilobite faunas, Heritage Range, Mem. Geol. Soc. Am., 1992, vol. 170, pp. 125–168.
Shimer, H.W. and Shrock, R.R., Index Fossils of North America, New York–London: J. Wiley and Sons–Chapman and Hall, 1944.
Šnajdr, M., O nových trilobitech z èeského kambria (On new trilobites of the Cambrian of Bohemia), Vìst. Ústr. Úst. Geol., 1957, vol. 32, pp. 235–244.
Šnajdr, M., Trilobiti ceskeho stredniho Kambria, Rozpr. Ustred.o Ustr. Geol., 1958, vol. 24, pp. 1–280.
Šnajdr, M., Bohemian Trilobites, Praha: Czech Geol. Surv., 1990.
Sobolevskaya, R. and Kaban’kov, V.Ya., Stratigrafiya kembriiskikh otlozhenii Gornogo Taimyra (Stratigraphy of the Cambrian Deposits of the Taimyr Mountain Region), St. Petersburg: Vseross. Nauchno-Issled. Inst. Okean. Geol., 2014.
Sohn, J.W. and Choi, D.K., An uppermost Cambrian trilobite fauna from the Yongwol Group, Trabaeksan Basin, Korea, Ameghiniana, 2002, vol. 39, pp. 59–76.
Suárez-Soruco, R., Nuevos trilobites del Tremadociano inferior (Ordovicico) del sur de Bolivia, Rev. Técn. YPFB, Bolivia, 1975, vol. 4, no. 3, pp. 129–146.
Sukhov, S.S., Cambrian depositional history of the Siberian craton: Evolution of the carbonate platforms and basins, Sediment. Fac. Palaeogeogr., 1997, vol. 17, no. 5, pp. 27–39.
Sukhov, S.S., Shabanov, Yu.Ya., Pegel, T.V., Saraev, S.V., Philippov, Yu.F., Korovnikov, I.V., Sundukov, V.M., Fedorov, A.B., Varlamov, A.I., Efimov, A.S., Kontorovich, V.A., and Kontorovich, A.E., Stratigrafiya neftegazonosnykh basseinov Sibiri (v devyati knigakh): kembrii Sibirskoi Platformy (Stratigraphy of oil and gas basins of Siberia (in nine books): Cambrian of Siberian Platform), vol. 1: Stratigrafiya (Stratigraphy), Kontorovich, A.E., Ed., Novosibirsk: Inst. Neftegaz. Geol. Geofiz. Sib. Otd. Ross. Akad. Nauk, 2016.
Sun, X., Cambrian agnostids from the North China Platform, Palaeontol. Cathayana, 1989, no. 4, pp. 53–99.
Taylor, K. and Rushton, A.W.A., The pre-Westphalian geology of the Warwickshire Coalfield, Bull. Geol. Surv. Great Brit., 1972, vol. 35, pp. 1–150.
Tortello, M.F., Una nueva especie de Leiagnostus (Trilobita, Agnostida) en el Tremadociano superior (Ordovicico Inferior) de Salta, Argentina, Ameghiniana, 1998, vol. 35, no. 1, pp. 97–99.
Tortello, M.F., A systematic revision of the late Furongian trilobites from Cerro Pelado, Mendoza, Argentina, Ameghiniana, 2014, vol. 51, no. 4, pp. 295–310.
Tortello, M.F. and Acenolaza, G.F., Trilobites agnóstidos del límite Cámbrico–Ordovícico de la Formación Lampazar, Sierra de Cajas, Provincia de Jujuy, Argentina, Rev. Españ. Paleontol., 1993, vol. 8, no. 2, pp. 177–184.
Tortello, M.F. and Esteban, S.B., Trilobites del Cámbrico Tardío de la Formación Lampazar (sierra de Cajas, Jujuy, Argentina): Implicancias bioestratigráficas y paleoambientales, Ameghiniana, 2003, vol. 40, no. 3, pp. 323–344.
Tortello, M.F. and Esteban, S.B., Trilobites agnóstidos del Cámbrico Tardío de la Sierra de Famatina (La Rioja, Argentina): Significado bioestratigráfico y paleoambiental, INSUGEO, Ser. Corr. Geol., 2005, vol. 19, pp. 157–168.
Tortello, M.F. and Esteban, S., Early Ordovician trilobites from the Nazareno area, northwestern Argentina, J. Paleontol., 2014, vol. 88, no. 5, pp. 925–947.
Troedsson, G.T., On the Cambro-Ordovician faunas of Western Quruq tagh, Eastern T’ien-Shan, Palaeontol. Sin. Whole Ser. No 106, New Ser. B, Nanking: Geol. Surv. China, 1937.
Tullberg, S.A., Om Agnostus–arterne i de kambriska aflagringarne vid Andrarum, Sver. Geol. Unders. Ser. C, 1880, vol. 42, no. 1, pp. 1–38.
Varlamov, A.I., Pack, K.L., and Rosova, A.V., Stratigrafiya i trilobity verkhnego kembriya razreza r. Chopko. Noril’skii rayon, severo–zapad Sibirskoi platformy (Stratigraphy and Trilobites of the Chopko River Section, Norilsk Region, Northwestern Siberian Platform), Novosibirsk: Nauka, 2005.
Varlamov, A.I. and Rosova, A.V., New Upper Cambrian Siberian regional stages (Eveniysk Series), in Novye dannye po stratigrafii i paleontologii nizhnego paleozoya Sibiri (New Data on the Stratigraphy and Paleontology of the Lower Paleozoic of Siberia), Novosibirsk: Sib. Nauchno-Issled. Inst. Geol. Geofiz. Mineral. Syr., 2009, pp. 3–61.
Weidner, T. and Nielsen, A.T., Tomagnostus sibiricus Pokrovskaya & Egorova, 1972 (Trilobita) from the Middle Cambrian Exsulans Limestone of Scania, Sweden, GFF, 2015, vol. 137, no. 1, pp. 9–19.
Westergård, A.H., Paradoxides oelandicus beds of Oland: With the account of a diamond boring through the Cambrian at Mossberga, Sver. Geol. Undersok., Ser. C, 1936, no. 394, part 30, pp. 1–65.
Westergård, A.H., Agnostidea of the Middle Cambrian of Sweden, Sver. Geol. Unders., Ser. C, 1946, no. 477, pp. 1–85.
Westergård, A.H., Supplementary notes on the Upper Cambrian trilobites of Sweden, Sver. Geol. Unders., Ser. C, 1947, no. 489, pp. 1–34.
Westrop, S.R., Trilobites of the Upper Cambrian Sunwaptan Stage, southern Rocky Mountains, Alberta, Palaeontogr. Can., 1986, no. 3, pp. 1–75.
Westrop, S.R. and Adrain, J.M., Biogeographic shifts in a transgressive succession: The Cambrian (Furongian, Jiangshanian; Latest Steptoean–Earliest Sunwaptan) agnostoid arthropods Kormagnostella Romanenko and Biciragnostus Ergaliev in North America, J. Paleontol., 2013, vol. 87, no. 5, pp. 804–817.
Westrop, S.R., Adrain, J.M., and Landing, E., The Cambrian (Sunwaptan, Furongian) agnostoid arthropod Lotagnostus Whitehouse, 1936, Bull. Geosci., 2011, vol 86, no. 3, pp. 569–594.
Westrop, S.R. and Eoff, J.D., Late Cambrian (Furongian; Paibian, Steptoean) agnostoid arthropods from the Cow Head Group, Western Newfoundland, J. Paleontol., 2012, vol. 86, no. 2, pp. 201–237.
Westrop, S.R., Ludvigsen, R., and Kindle, C.H., Marjuman (Cambrian) trilobites of the Cow Head Group, Western Newfoundland, J. Paleontol., 1996, vol. 70, no. 5, pp. 804–829.
Whitehouse, F.W., The Cambrian faunas of North–Eastern Australia, Mem. Queensland Mus., 1936, vol. 11, parts 1 and 2, pp. 1–114.
Whitehouse, F.W., The Cambrian faunas of northeastern Australia: Part3. The Polymerid trilobites, Mem. Queensland Mus., 1939, vol. 11, pp. 179–282.
Xiang, L. and Zhang, T., Stratigraphy and trilobite faunas of the Cambrian in the western part of northern Tianshan, Xinjiang, Geol. Mem., Ser. 2, 1985, vol. 4, pp. 1–243.
Zhang, T., Trilobita. Paleontological Atlas of Northwest China, Xinjiang Province, Beijing: Geol. Publ. House, 1981, vol. 1, pp. 134–213.
Zhou, Zh., Notes on Chinese Ordovician agnostids, Acta Palaeontol. Sin., 1987, vol. 26, pp. 639–661.
Zhou, Z. and Zhen, Y., Trilobite record of China, Beijing: Sci. Press, 2008.
Zhu, Z., Lin, H. Zhang, Z., Trilobites, in Atlas of the Palaeontology of Northwestern China, Qinghai, Beijing: Geol. Publ. House, 1979, vol. 2, pp. 81–116.
Żylińska, A., Late Cambrian trilobites from the Holy Cross Mountains, central Poland, Acta Geol. Polon., 2001, vol. 51, no. 4, pp. 333–383.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Naimark, E.B., Pegel, T.V. Revision of the Cambrian Agnostina (Trilobita?) from Russia. Paleontol. J. 51, 1167–1248 (2017). https://doi.org/10.1134/S0031030117110016
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0031030117110016