Early Metazoan Evolution and the Meaning of Its Fossil Record

  • Jerzy Dzik
Part of the Evolutionary Biology book series (EBIO, volume 27)


Much new data on late Precambrian and early Phanerozoic metazoan fossils have recently emerged as a result of discoveries of new fossil sites (Mikulic et al., 1985; Conway Morris, 1989; Hou et al., 1991), reinterpretation of earlier findings (Whittington, 1980; Conway Morris, 1985b; Conway Morris et al., 1987), and application of new paleontological techniques. Chemical extraction from the rock matrix of originally phosphatic or phosphatized skeletal fossils (Rozanov et al., 1969; Qian and Bengtson, 1989;Bengtson et al., 1990; Dzik et al., 1993), as well as finely phosphatized arthropod cuticles and soft tissues (Müller, 1979, 1983; Müller and Walossek, 1985; Andres, 1989) has appeared especially fruitful. The importance of this new source of evidence has been inadequately acknowledged not only in the zoological but even in the paleontological literature, partly because of diverging opinions on the significance of geological age in phylogenetic inference (Patterson, 1981; Briggs and Fortey, 1989).


Lower Cambrian Muscle Scar Rugose Coral Acta Palaeontol Burgess Shale 
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  1. Alberti, G. K. B., 1985, Neue Taxa der Dacryoconarida, insbesondere der Corniculinidae n. fam., aus dem basalen Flemersbacher Tentaculitenkalk (Bayerische Faziesreihe, Unter-Devon) von Oberfranken, Mitt. Geol.-Paläontol. Inst. Univ. Hamburg 59:39–50.Google Scholar
  2. Aldridge, R. J., Briggs, D. E. G., Clarkson, E. N. K., and Smith, M. P., 1986, The affinities of conodonts—New evidence from the Carboniferous of Edinburgh, Scotland, Lethaia 19:279–291.CrossRefGoogle Scholar
  3. Andres, D., 1988, Strukturen, Apparate und Phylogenie primitiver Conodonten, Palaeontographica 200A.-105–152.Google Scholar
  4. Andres, D., 1989, Phosphatisierte Fossilien aus dem unteren Ordoviz von Südschweden, Berl. Geowiss. Abh. (A) 106:9–19.Google Scholar
  5. Arduini, P., Pinna, G., and Teruzzi, G., 1981, Megaderaion sinemuriense n. g. n. sp., a new fossil enteropneust of the Sinemurian of Osteno in Lombardy, Atti Soc. Ital. Sci. Nat. Mus. Civ. Stor. Nat. Milano 122:104–108.Google Scholar
  6. Bandel, K., 1982, Morphologie und Bildung der frühontogenetischen Gehäuse bei conchiferen Mollusken, Facies 7:1–198.CrossRefGoogle Scholar
  7. Bandel, K., 1986, The reconstruction of “Hyolithes kingl” as annelid worm from the Cambrian of Jordan, Mitt. Geol.-Paläontol. Inst. Univ. Hamburg 61:35–101.Google Scholar
  8. Bardack, D., 1986, Les premiers fossiles de hagfish (Myxiniformes) et Enteropneusta (Hemichordata) dépots de la faune (Pennsylvanienne) du Mazon Creek dans Illinois, USA, Bull. Trimestr. Soc. Hist. Nat. Amis Mus. Autun 116:97.Google Scholar
  9. Bardack, D., 1991, First fossil hagfish (Myxinoidea): A record from the Pennsylvanian of Illinois, Science 254:701–703.PubMedCrossRefGoogle Scholar
  10. Bardack, D., and Richardson, E. S., Jr., 1977, New agnathous fishes from the Pennsylvanian of Illinois, Fieldiana Geol. 33:489–510.Google Scholar
  11. Bengtson, S., 1970, The lower Cambrian fossil Tommotia, Lethaia 3:363–392.CrossRefGoogle Scholar
  12. Bengtson, S., 1977, Early Cambrian button-shaped phosphatic microfossils from the Siberian Platform, Palaeontology 20:751–762.Google Scholar
  13. Bengtson, S., 1981, Atractosella, a Silurian alcyonacean octocoral, J. Paleontol. 55:281–294.Google Scholar
  14. Bengtson, S., 1983, The early history of the Conodonta, Fossils Strata 15:5–19.Google Scholar
  15. Bengtson, S., 1991a, The origin and extinction of phyla, Geol. Fören. Stockh. Förh. 113:76–77.CrossRefGoogle Scholar
  16. Bengtson, S., 1991b, Oddballs from the Cambrian start to get even, Nature 351:184–185.CrossRefGoogle Scholar
  17. Bengtson, S., 1992, The cup-shaped Cambrian fossil Maikhanella and the relationship between coeleoscleritophorans and molluscs, Lethaia 25:401–420.CrossRefGoogle Scholar
  18. Bengtson, S., and Conway Morris, S., 1984, A comparative study of lower Cambrian Halkieria and middle Cambrian Wiwaxia, Lethaia 17:307–329.CrossRefGoogle Scholar
  19. Bengtson, S., and Urbanek, A., 1986, Rhabdotubus, a Middle Cambrian rhabdopleurid hemichordate, Lethaia 19:293–308.CrossRefGoogle Scholar
  20. Bengtson, S., and Yue, Z., 1992, Predatorial borings in Late Precambrian mineralized exoskeletons, Science 257:367–369.PubMedCrossRefGoogle Scholar
  21. Bengtson, S., Matthews, S. C., and Missarzhevsky, V. V., 1986, The Cambrian netlike fossil Microdictyon, in: Problematic Fossil Taxa, (A. Hoffman and M. H. Nitecki, eds.), pp. 97–115, Oxford University Press, Oxford.Google Scholar
  22. Bengtson, S., Conway Morris, S., Cooper, B. J., Jell, P. A., and Runnegar, B. N., 1990, Early Cambrian fossils from South Australia, Mem. Assoc. Australas. Palaeontol. 9:1–364.Google Scholar
  23. Berg-Madsen, V., 1987, Tuarangia from Bornholm (Denmark) and similarities in Baltoscandian and Australasian late middle Cambrian faunas, Alcheringa 11:245–259.CrossRefGoogle Scholar
  24. Bergström, J., 1986, Metazoan evolution—A new model, Zool. Scripta 15:189–200.CrossRefGoogle Scholar
  25. Bergström, J., 1991, Metazoan evolution around the Precambrian—Cambrian transition, in: The Early Evolution of Metazoa and Significance of Problematic Taxa, (S. Conway Morris and A. S. Simonetta, eds.), pp. 25–34, Cambridge University Press, Cambridge.Google Scholar
  26. Bergström, J., Stürmer, W., and Winter, G., 1980, Palaeoisopus, Palaeopantopus and Palaeothea, pycnogonid arthropods from the Lower Devonian Hunsrück Slate, West Germany. Paläontol. Z. 54:7–54.Google Scholar
  27. Bischoff, G. C. O., 1978, Internal structures of conulariid tests and their functional significance, with special reference to Circoconulariina n. subord, Senckenb. Lethaea 59:275–327.Google Scholar
  28. Blieck, A., 1992, At the origin of chordates, Geobios 25:101–113.CrossRefGoogle Scholar
  29. Briggs, D. E. G., 1976, The arthropod Branchiocaris n. gen., middle Cambrian, Burgess Shale, British Columbia, Bull. Geol. Surv. Can. 264:1–17.Google Scholar
  30. Briggs, D. E. G., 1978, The morphology, mode of life, and affinities of Canadaspis perfecta (Crustacea: Phyllocarida), middle Cambrian, Burgess Shale, British Columbia, Philos. Trans. R. Soc. Lond. B 281:439–487.CrossRefGoogle Scholar
  31. Briggs, D. E. G., 1981, The arthropod Odaraia alata Walcott, middle Cambrian, Burgess Shale, British Columbia, Philos. Trans. R. Soc. Lond. B 291:541–584.CrossRefGoogle Scholar
  32. Briggs, D. E. G., 1991, Extraordinary fossils, Am. Sci. 79:130–141.Google Scholar
  33. Briggs, D. E. G., and Collins, D., 1988, A middle Cambrian chelicerate from Mount Stephen, British Columbia, Palaeontology 31:779–798.Google Scholar
  34. Briggs, D. E. G., and Fortey, R. A., 1989, The early radiation and relationships of the major arthropod groups, Science 246:241–243.PubMedCrossRefGoogle Scholar
  35. Briggs, D. E. G., Bruton, D. L., and Whittington, H. B., 1979, Appendages of the arthropod Aglaspis spinifer (Upper Cambrian, Wisconsin) and their significance, Palaeontology 22:167–180.Google Scholar
  36. Briggs, D. E. G., Clarkson, E. N. K., and Aldridge, R. J., 1983, The conodont animal, Lethaia, 16:1–14.CrossRefGoogle Scholar
  37. Butterfield, N. J., 1990, A reassessment of the enigmatic Burgess Shale fossil Wiwaxia corrugata (Matthew) and its relationship to the polychaete Canadia spinosa Walcott, Paleobiology 16:287–303.Google Scholar
  38. Chen, J., 1988, Precambrian metazoans of the Huai River drainage area (Anhui, E. China): Their taphonomic and ecological evidence, Senckenb. Lethaea 69:189–215.Google Scholar
  39. Chen, J., and Erdtmann, B.-D., 1991, Lower Cambrian fossil Lagerstätte from Chengjiang, Yunnan, China: Insight for reconstructing early metazoan life, in: The Early Evolution of Metazoa and Significance of Problematic Taxa (S. Conway Morris and A. Simonetta, eds.), pp. 57–76, Cambridge University Press, Cambridge.Google Scholar
  40. Chen, J., Hou, X., and Lu, H., 1989a, Early Cambrian netted scale-bearing worm-like sea animal, Acta Palaeontol. Sin. 28:1–16.Google Scholar
  41. Chen, J., Hou, X., and Lu, H., 1989b, Early Cambrian hock glass-like rare sea animal Dinomischus (Entoprocta) and its ecological features, Acta Palaeontol. Sin. 28:59–71.Google Scholar
  42. Conway Morris, S., 1976, A new Cambrian lophophorate from the Burgess Shale of British Columbia, Palaeontology 19:199–222.Google Scholar
  43. Conway Morris, S., 1977a, A redescription of the Middle Cambrian worm Amiskwia sagittiformis Walcott from the Burgess Shale of British Columbia, Paläontol. Z. 51:271–287.Google Scholar
  44. Conway Morris, S., 1977b, Fossil priapulid worms, Spec. Pap. Palaeont. 20:1–97.Google Scholar
  45. Conway Morris, S., 1979a, The Burgess Shale (Middle Cambrian) fauna, Annu. Rev. Ecol. Syst. 10:327–349.CrossRefGoogle Scholar
  46. Conway Morris, S., 1979b, Middle Cambrian polychaetes from the Burgess Shale of British Columbia, Philos. Trans. R. Soc. Lond. B 285:227–274.CrossRefGoogle Scholar
  47. Conway Morris, S., 1985a, The middle Cambrian metazoan Wiwaxia corrugata (Matthew) from the Burgess Shale and Ogygopsis Shale, British Columbia, Canada, Philos. Trans. R. Soc. Lond. B 307:507–586.CrossRefGoogle Scholar
  48. Conway Morris, S., 1985b, Cambrian Lagerstätten: Their distribution and significance, Philos. Trans. R. Soc. Lond. B 311:49–65.CrossRefGoogle Scholar
  49. Conway Morris, S., 1989, The persistence of Burgess Shale-type faunas: Implications for the evolution of deeper-water faunas, Trans. R. Soc. Edinburgh 80:271–283.CrossRefGoogle Scholar
  50. Conway Morris, S., 1990, Typhloesus wellsi (Melton & Scott 1973), a bizarre metazoan from the Carboniferous of Montana, Philos. Trans. R. Soc. Lond. B 327:595–624.CrossRefGoogle Scholar
  51. Conway Morris, S., and Chen, M., 1992, Carinachitids, hexaconulariids, and Punctatus: problematic metazoans from the Early Cambrian of South China, J. Paleont., 66:384–406.Google Scholar
  52. Conway Morris, S., and Peel, J. S., 1990, Articulated halkieriids from the lower Cambrian of north Greenland, Nature 345:802–805.CrossRefGoogle Scholar
  53. Conway Morris. S., and Robison, R. A., 1986, Middle Cambrian priapulids and other soft-bodied fossils from Utah and Spain, Univ. Kansas Paleontol. Contrib. 117:1–22.Google Scholar
  54. Conway Morris, S., and Robison, R. A., 1988, More soft-bodied animals and algae from the middle Cambrian of Utah and British Columbia, Univ. Kansas Paleontol. Contrib. 122:1–48.Google Scholar
  55. Conway Morris, S., Peel, J. S., Higgins, A. K., Soper, N. J., and Davis, N. C., 1987, A Burgess Shale-like fauna from the lower Cambrian of North Greenland, Nature 326:181–183.CrossRefGoogle Scholar
  56. Dahl, E., and Hessler, R. R., 1982, The crustacean lacinia mobilis: A reconsideration of its origin, function and phylogenetic implications, Zool. J. Linn. Soc. 74:133–146.CrossRefGoogle Scholar
  57. Dilly, P. N., 1985, The prosicular stage of Rhabdopleura (Pterobranchia: Hemichordata), J. Zool. A (Lond.) 206:163–174.Google Scholar
  58. Donovan, S. K., and Paul, C. R. C., 1985, A new possible armoured worm from the Tremadoc of Sheinton, Shropshire, Proc. Geol. Assoc. 96:87–91.CrossRefGoogle Scholar
  59. Durham, J. W., 1974, Systematic position of Eldonia ludwigi Walcott, J. Paleont., 48:750–755.Google Scholar
  60. Dzik, J., 1978, Larval development of the hyolithids, Lethaia 11:293–299.CrossRefGoogle Scholar
  61. Dzik, J., 1980, Ontogeny of Bactrotheca and related hyoliths, Geol. Fören. Stockh. Förh. 102(3): 223–233.CrossRefGoogle Scholar
  62. Dzik, J., 1981a, Evolutionary relationships of early Palaeozoic ‘cyclostomatous’ Bryozoa, Palaeontology 24(4):827–861.Google Scholar
  63. Dzik, J., 1981b, Origin of the Cephalopoda, Acta Palaeontol. Polon. 26(2):161–191.Google Scholar
  64. Dzik, J., 1983, Larval development and relationships of Mimospira—A presumably hyperstrophic Ordovician gastropod, Geol. Fören. Stockh. Förh. 104(3):231–239.CrossRefGoogle Scholar
  65. Dzik, J., 1986a, Turrilepadida and other Machaeridia, in: Problematic Fossil Taxa (A. Hoffman and M. H. Nitecki, eds.), pp. 116–134, Oxford University Press, Oxford.Google Scholar
  66. Dzik, J., 1986b, Chordate affinities of the conodonts, in: Problematic Fossil Taxa (A. Hoffman and M. H. Nitecki, eds.), pp. 240–254, Oxford University Press, Oxford.Google Scholar
  67. Dzik, J., 1991a, Is fossil evidence consistent with traditional views of the early Metazoan phylogeny? in The Early Evolution of Metazoa and Significance of Problematic Taxa (S. Conway Morris and A. Simonetta, eds.), pp. 47–56, Cambridge University Press, Cambridge.Google Scholar
  68. Dzik, J., 1991b, Possible solitary bryozoan ancestors from the early Palaeozoic and the affinities of the Tentaculita, in: Bryozoaires actuels et fossiles: Bryozoa Living and Fossil (Société des Sciences Naturelles de l’Ouest de la France, Mémoire hors série 1) (F. P. Bigey and J.-L. d’Hondt, eds.), pp. 121–131.Google Scholar
  69. Dzik, J., 1991c, Features of the fossil record of evolution, Acta Palaeontol. Polon. 36(2):91–113.Google Scholar
  70. Dzik, J., 1991d, Evolution of oral apparatuses in conodont chordates, Acta Palaeontol. Polon. 36(3):265–323.Google Scholar
  71. Dzik, J., 1992a, Dzieje zycia na Ziemi. Wprowadzenie do paleobiologii, Panstwowe Wydawnictwo Naukowe, Warsaw.Google Scholar
  72. Dzik, J., 1992b, Early astogeny and relationships of the Ordovician rhabdomesid bryozoans, Acta Palaeontol. Polon. 37:37–54.Google Scholar
  73. Dzik, J., and Drygant, D., 1986, The apparatus of panderodontid conodonts, Lethaia 19(2): 133–141.CrossRefGoogle Scholar
  74. Dzik, J., and Korn, D., 1992, Devonian ancestors of Nautilus, Paläontol. Z. 66:81–98.Google Scholar
  75. Dzik, J., and Krumbiegel, G., 1989, The oldest ‘onychophoran’ Xenusion: A link connecting phyla? Lethaia 22(2): 169–181.CrossRefGoogle Scholar
  76. Dzik, J., Olempska, E., and Pisera A., 1993, Ordovician carbonate platform ecosystem of the Holy Cross Mountains, Palaeontol Polon., in press.Google Scholar
  77. Elliott, D. K., 1987, A reassessment of Astraspis desiderata, the oldest North American vertebrate, Science 237:190–192.PubMedCrossRefGoogle Scholar
  78. Emerson, M. J., and Schram, F. R., 1986, Remipedia. Part 2. Paleontology, Proc. San Diego Soc. Nat. Hist. 7:1–52.Google Scholar
  79. Emerson, M. J., and Schram, F. R., 1990, The origin of crustacean biramous appendages and the evolution of Arthropoda, Science 250:667–669.PubMedCrossRefGoogle Scholar
  80. Evans, K. R., and Rowell, A. J., 1990, Small shelly fossils from Antarctica: An early Cambrian faunal connection with Australia, J. Paleontol. 64:692–699.Google Scholar
  81. Fortey, R. A., and Cooper, R. A., 1986, A phylogenetic classification of the graptoloids, Palaeontology 29:631–654.Google Scholar
  82. Glaessner, M. F., 1979, Lower Cambrian Crustacea and annelid worms from Kangaroo Island, South Australia, Alcheringa 3:21–31.CrossRefGoogle Scholar
  83. Gould, S. J., 1989, Wonderful Life. The Burgess Shale and the Nature of History, Norton, New York.Google Scholar
  84. Grant, S. W., 1990, Shell structure and distribution of Cloudina, a. potential index fossil for the terminal Proterozoic, in: Proterozoic Evolution and Environments (A. H. Knoll and J. H. Ostrom, eds.),Am. J. Sci. Spec. Vol. 290-A:261–294.Google Scholar
  85. Haszprunar, G., 1992, The first mollusks—Small animals, Boll. Zool. 59:1–16.CrossRefGoogle Scholar
  86. Hinz, I., Kraft, P., Mergl, M., and Müller, K. J., 1990, The problematic Hadimopanella, Kaimenella, Milaculum and Utahphospha identified as sclerites of Palaeoscolecida, Lethaia 23:217–221.CrossRefGoogle Scholar
  87. Hou, X., and Chen, J., 1989a, Early Cambrian tentacled worm-like animals (Facivermis gen. nov.) from Chengjiang, Yunnan, Acta Palaeontol. Sin. 28:32–41.Google Scholar
  88. Hou, X., and Chen, J., 1989b, Early Cambrian arthropod-annelid intermediate sea animal, Luolishania gen. n. from Chengjiang, Yunnan, Acta Palaeontol. Sin. 28:207–213.Google Scholar
  89. Hou, X., and Sun, W., 1988, Discovery of Chengjiang fauna at Meishucun, Jinning, Yunnan, Acta Palaeontol. Sin. 27:1–12.Google Scholar
  90. Hou, X., Ramsköld, L., and Bergström, J., 1991, Composition and preservation of the Chengjiang fauna—A Lower Cambrian soft-bodied biota, Zool. Scripta 20:395–411.CrossRefGoogle Scholar
  91. Hughes, C. P., 1975, Redescription of Burgessia bella from the middle Cambrian Burgess Shale, British Columbia, Fossils Strata 4:415–435.Google Scholar
  92. Jeffries, R. P. S., Lewis, M., and Donovan, J. K., 1987, Protocystites menevensis—A stem group chordate (Cornute) from the middle Cambrian of South Wales, Palaeontology 30:429–484.Google Scholar
  93. Jell, P. A., 1979, Plumulites and the Machaeridian problem, Alcheringa 3:253–259.CrossRefGoogle Scholar
  94. Jell, P. A., and Jell, J. S., 1976, Early middle Cambrian corals from western New South Wales, Alcheringa 1:181–195.CrossRefGoogle Scholar
  95. Jenkins, R. J. F., 1985, The enigmatic Ediacaran (late Precambrian) genus Rangea and related forms, Paleobiology 11:336–355.Google Scholar
  96. Jensen, S., 1990, Predation by early Cambrian trilobites on infaunal worms—Evidence from the Swedish Mickwitzia Sandstone, Lethaia 23:29–42.CrossRefGoogle Scholar
  97. Jones, D., and Thompson, I., 1977, Echiura from the Pennsylvanian Essex fauna of northern Illinois, Lethaia 10:317–325.CrossRefGoogle Scholar
  98. Kerber, M., 1988, Mikrofossilien aus unterkambrischen Gesteinen der Montagne Noire, Frankreich, Palaeontogr. A 202:127–203.Google Scholar
  99. Kukalova-Peck, J., 1986, New Carboniferous Diplura, Monura, and Thysanura, the hexapod ground plan, and the role of thoracic side lobes and the origin of wings (Insecta), Can. J. Zool. 65:2327–2345.CrossRefGoogle Scholar
  100. Lafuste, J., Debrenne, F., Gandin, A., and Gravestock, D., 1991, The oldest tabulate coral and the associated Archaeocyatha, lower Cambrian, Flinders Ranges, South Australia, Geobios 24:697–718.CrossRefGoogle Scholar
  101. Lund, R., and Janvier, P., 1986, A second lamprey from the lower Carboniferous (Namurian) of Bear Gulch, Montana (U.S.A.), Geobios 19:647–652.CrossRefGoogle Scholar
  102. Mallatt, J., 1984, Early vertebrate evolution: Pharyngeal structure and the origin of gnathostomes, J. Zool. (Lond.) 204:169–183.CrossRefGoogle Scholar
  103. Marek, L., 1967, The class Hyolitha in the Caradoc of Bohemia, Sborn. Geol. Věd. Paleontol. 9:51–114.Google Scholar
  104. Marek, L., and Yochelson, E. L., 1976, Aspects of the biology of Hyolitha (Mollusca), Lethaia 9:65–82.CrossRefGoogle Scholar
  105. McKinney, F. K., and Jackson, J. B. C., 1989, Bryozoan Evolution, Unwin Hyman, Boston.Google Scholar
  106. McLean, J. H., 1981, The Galapagos rift limpet Neomphalus: Relevance to understanding the evolution of a major Paleozoic-Mesozoic radiation, Malacologia 21:291–336.Google Scholar
  107. Mikulic, D. G., Briggs, D. E. G., and Kluessendorf, J., 1985, A new exceptionally preserved biota from the lower Silurian of Wisconsin, U.S.A., Philos. Trans. R. Soc. Lond. B 311:75–85.CrossRefGoogle Scholar
  108. Müller, K. J., 1979, Phosphatocopine ostracodes with preserved appendages from the upper Cambrian of Sweden, Lethaia 12:12–27.CrossRefGoogle Scholar
  109. Müller, K. J., 1983, Crustacea with preserved soft parts from the upper Cambrian of Sweden, Lethaia 16:93–109.CrossRefGoogle Scholar
  110. Müller, K. J., and Miller, J. F., 1976, The problematic microfossils Utahphospha from the upper Cambrian of the western United States, Lethaia 9:391–395.CrossRefGoogle Scholar
  111. Müller, K. J., and Walossek, D., 1985, A remarkable arthropod fauna from the upper Cambrian “Orsten” of Sweden, Trans. R. Soc. Edinburgh 76:161–172.CrossRefGoogle Scholar
  112. Müller, K. J., and Walossek, D., 1986a, Martinssonia elongata gen. et sp. n., a crustacean-like euarthropod from the upper Cambrian ‘Orsten’ of Sweden, Zool. Scripta 15:73–92.CrossRefGoogle Scholar
  113. Müller, K. J., and Walossek, D., 1986b, Arthropod larvae from the upper Cambrian of Sweden, Trans. R. Soc. Edinburgh 77:157–179.CrossRefGoogle Scholar
  114. Müller, K. J., and Walossek, D., 1988, External morphology and larval development of the upper Cambrian maxillopod Bredocaris admirabilis, Fossils Strata 23:1–70.Google Scholar
  115. Patterson, C., 1981, Significance of fossils in determining evolutionary relationships, Annu. Rev. Ecol. Syst. 12:195–223.CrossRefGoogle Scholar
  116. Paul, C. R. C., 1988, The phylogeny of the cystoids. in: Echinoderm Phylogeny and Evolutionary Biology (C. R. C. Paul and A. B. Smith, eds.), pp. 199–213, Clarendon Press, Oxford.Google Scholar
  117. Paul, C. R. C., and Smith, A. B., 1984, The early radiation and phylogeny of echinoderms, Biol. Rev. 59:443–481.CrossRefGoogle Scholar
  118. Peel, J., 1991, Functional morphology of the class Helcionelloida nov., and the early evolution of the Mollusca, in: The Early Evolution of Metazoa and Significance of Problematic Taxa (S. Conway Morris and A. Simonetta, eds.), pp. 157–177, Cambridge University Press, Cambridge.Google Scholar
  119. Peel, J., and Berg-Madsen, V., 1988, A new salterellid (Phylum Agmata) from the upper middle Cambrian of Denmark, Bull. Geol. Soc. Denmark 37:75–82.Google Scholar
  120. Pojeta, J., Jr., 1978, The origin and early taxonomic diversification of pelecypods, Philos. Trans. R. Soc. Lond. B 284:225–246.CrossRefGoogle Scholar
  121. Pojeta, J., Jr., and Runnegar, B., 1979a, The paleontology of rostroconch molluscs and the early history of the phylum Mollusca, U. S. Geol. Surv. Prof. Pap. 968:1–85.Google Scholar
  122. Pojeta, J., Jr., and Runnegar, B., 1979b, Rhytiodentalium kentuckyensis, a new genus and new species of Ordovician scaphopod, and the early history of scaphopod molluscs, J. Paleontol. 53:530–541.Google Scholar
  123. Qian, Y., and Bengtson, S., 1989, Palaeontology and biostratigraphy of the early Cambrian Meishucunian Stage in Yunnan Province, South China, Fossils Strata 24:1–156.Google Scholar
  124. Ramsköld, L., 1992a, The second leg row of Hallucigenia discovered, Lethaia 25:221–224.CrossRefGoogle Scholar
  125. Ramsköld, L., 1992b, Homologies in Cambrian Onychophora, Lethaia 25:443–460.CrossRefGoogle Scholar
  126. Ramsköld, L., and Hou, X., 1991, New early Cambrian animal and onychophoran affinities of enigmatic metazoans, Nature 351:225–228.CrossRefGoogle Scholar
  127. Reif, W.-E., 1982, Evolution of dermal skeleton and dentition in vertebrates. The odontode regulation theory, Evolutionary Biology, Vol. 15 (M. K. Hecht, B. Wallace, and G. T. Prance, eds.), pp. 287–368, Plenum Press, New York.CrossRefGoogle Scholar
  128. Rickards, R. B., and Stait, B. A., 1984, Psigraptus, its classification, evolution and zooid, Alcheringa 8:101–111.CrossRefGoogle Scholar
  129. Ritchie, A., and Gilbert-Tomlinson, J., 1977, First Ordovician vertebrates from the southern hemisphere, Alcheringa 1:351–368.CrossRefGoogle Scholar
  130. Rolfe, W. D. I., 1981, Septemchiton—A misnomer, J. Paleontol. 55:675–677.Google Scholar
  131. Rowell, A. J., and Caruso, N. E., 1985, The evolutionary significance of Nisusia sulcata, and early articulate brachiopod, J. Paleontol. 59:1227–1243.Google Scholar
  132. Rozanov, A. J., Missarzhevsky, V. V., Volkova, N. A., Voronova, L. G., Krylov, I. N., Keller, B. M., Korolyuk, I. K., Lendzion, K., Michniak, R., Pychova, N. G., and Sidorov, A. D., 1969, Tommotian Stage and the Cambrian lower boundary problem, Trudy Inst. Geol. Akad. Nauk SSSR 206:1–380 [in Russian].Google Scholar
  133. Rozhnov, S. V., Fedorov, A. B., and Sayutina, T. A., 1992, Lower Cambrian Echinodermata on the USSR territory, Paleontol. Zh. 1992:53–66 [in Russian].Google Scholar
  134. Runnegar, B., 1981, Muscle scars, shell form and torsion in Cambrian and Ordovician univalved molluscs, Lethaia 14:311–322.CrossRefGoogle Scholar
  135. Runnegar, B., Pojeta, J., Jr., Morris, N. J., Taylor, J. D., Taylor, M. E., and McClung, G., 1975, Biology of the Hyolitha, Lethaia 8:181–191.CrossRefGoogle Scholar
  136. Runnegar, B., Pojeta, J., Jr., Taylor, M. E., and Collins, D., 1979, New species of the Cambrian and Ordovician chitons Matthevia and Chelodes from Wisconsin and Queensland: Evidence for the early history of polyplacophoran molluscs, J. Paleontol. 53:1374–1394.Google Scholar
  137. Sansom, I. J., Smith, M. P., Armstrong, H. A., and Smith, M. M., 1992, Presence of the earliest vertebrate hard tissues in conodonts, Science 256:1308–1311.PubMedCrossRefGoogle Scholar
  138. Schram, F. R., 1973, Pseudocoelomates and a nemertine from the Illinois Pennsylvanian, J. Paleontol. 47:985–989.Google Scholar
  139. Schram, F. R., 1978, Arthropods: A convergent phenomenon, Fieldiana Geol. 39:61–108.Google Scholar
  140. Schram, F. R., 1979, Worms of the Mississippian Bear Gulch Limestone of central Montana, U.S.A., Trans. San Diego Soc. Nat. Hist. 19:107–120.Google Scholar
  141. Schram, F. R., Yager, J., and Emerson, M. J., 1986, Remipedia. Part 1. Systematics, San Diego Soc. Nat. Hist. Mem. 15:1–60.Google Scholar
  142. Scilacher, A., 1989, Vendozoa: Organismic construction in the Proterozoic biosphere, Lethaia 22:229–239.CrossRefGoogle Scholar
  143. Scilacher, A., 1992, Vendobionta and Psammocorallia: Lost constructions of Precambrian evolution, J. Geol. Soc. Lond. 149:607–613.CrossRefGoogle Scholar
  144. Smith, A. B., 1988, Patterns of diversification and extinction of early Palaeozoic echinoderms, Palaeontology 31:799–828.Google Scholar
  145. Smith, M. P., Briggs, D. E. G., and Aldridge, R. J., 1987, A conodont animal from the lower Silurian of Wisconsin, USA, and the apparatus architecture of panderodontid conodonts, in: Palaeobiology of Conodonts (R. J. Aldridge, ed.), pp. 91–104, Ellis Horwood, Chichester.Google Scholar
  146. Sprinkle, J., 1973, Morphology and evolution of blastozoan echinoderms, Mus. Comp. Zool. Harvard Univ. Spec. Publ. 1973:1–283Google Scholar
  147. Stolarski, J., 1993, Ontogenetic development and functional morphology in the early growth stages of Calceola sandalina Linné, Courier Forsch. Inst. Senckenb., in press.Google Scholar
  148. Sun, W., and Hou, X., 1989, Early Cambrian medusae from Chengjiang, Yunnan, Acta Palaeontol. Sin. 28:257–270.Google Scholar
  149. Sweet, W. C., 1988, The Conodonta. Morphology, Taxonomy, Paleoecology and Evolutionary History of a Long-Extinct Animal Phylum, Clarendon Press, Oxford.Google Scholar
  150. Szaniawski, H., 1982, Chaetognath grasping spines recognized among Cambrian protoconodonts, J. Paleontol. 56:806–810.Google Scholar
  151. Ubaghs, G., and Robison, R. A., 1985, A new homoiostelean and a new eocrinoid from the middle Cambrian of Utah, Univ. Kansas Paleontol. Contrib. 115:1–24.Google Scholar
  152. Ubaghs, G., and Robison, R. A., 1988, Homalozoan echinoderms of the Wheeler Formation (middle Cambrian) of western Utah, Univ. Kansas Paleontol. Contrib. 120:1–17.Google Scholar
  153. Urbanek, A., 1986, The enigma of graptolite ancestry: Lesson from a phylogenetic debate, in: Problematic Fossil Taxa (A. Hoffman and M. H. Nitecki, eds.), pp. 184–226, Oxford University Press, Oxford.Google Scholar
  154. Ushatinskaya, G. T., 1987, Unusual inarticulate brachiopods from the lower Cambrian of Mongolia, Paleontol. Zh. 1987:62–68.Google Scholar
  155. Valkov, A. K., 1987, Biostratigraphy of the Early Cambrian of the East of Siberian Platform: Yudomo-Olenekian region, Nauka, Moscow [in Russian].Google Scholar
  156. Van dem Boogaard, M., 1988, Some data on Milaculum Müller, 1973, Scripta Geol. 88:1–25.Google Scholar
  157. Van Iten, H., 1991, Evolutionary affinities of conulariids, in: The Early Evolution of Metazoa and Significance of Problematic Taxa (S. Conway Morris and A. Simonetta, eds.), pp. 145–155, Cambridge University Press, Cambridge.Google Scholar
  158. Walossek, D., and Müller, K. J., 1990, Upper Cambrian stem-lineage crustaceans and their bearing upon the monophyletic origin of Crustacea and the position of Agnostus, Lethaia 23:409–427.CrossRefGoogle Scholar
  159. Walossek, D., and Szaniawski, H., 1991, Cambrocaris baltica n. gen. n.sp., a possible stem-lineage crustacean from the upper Cambrian of Sweden, Lethaia 24:363–378.CrossRefGoogle Scholar
  160. Webers, G. F., and Yochelson, E. L., 1989, Late Cambrian molluscan faunas and the origin of the Cephalopoda, in: Origins and Evolution of the Antarctic Biota (J. A. Crame, ed.), Geol. Soc. Spec. Publ. 47:29–42.Google Scholar
  161. Weedon, M. J., 1991, Microstructure and affinities of the enigmatic Devonian tubular fossil Trypanopora, Lethaia 24:227–234.CrossRefGoogle Scholar
  162. Whittard, W. F., 1954, Palaeoscolex piscatorum gen. et sp. nov., a worm from the Tremadocian of Shropshire, Q. J. Geol. Soc. Lond. 109:125–133.CrossRefGoogle Scholar
  163. Whittington, H. B., 1974, Yohoia Walcott and Plenocaris n. gen., arthropods from the Burgess Shale, Middle Cambrian, British Columbia, Bull. Geol. Surv. Can. 231:1–20.Google Scholar
  164. Whittington, H. B., 1975, The enigmatic animal Opabinia regalis, middle Cambrian, Burgess Shale, British Columbia, Philos. Trans. R. Soc. Lond. B 271:1–41.CrossRefGoogle Scholar
  165. Whittington, H. B., 1978, The lobopod animal Aysheaia pedunculata Walcott, middle Cambrian, Burgess Shale, British Columbia, Philos. Trans. R. Soc. Lond. B 284:165–197.CrossRefGoogle Scholar
  166. Whittington, H. B., 1979, Early arthropods, their appendages and relationships, in: The Origin of Major Invertebrate Groups (M. R. House, ed.), pp. 253–268, Academic Press, London.Google Scholar
  167. Whittington, H. B., 1980, The significance of the fauna of the Burgess Shale, middle Cambrian, British Columbia, Proc. Geol. Assoc. 91:127–148.CrossRefGoogle Scholar
  168. Whittington, H. B., 1981, Rare arthropods from the Burgess Shale, middle Cambrian, British Columbia, Philos. Trans. R. Soc. Lond. B 292:329–357.CrossRefGoogle Scholar
  169. Whittington, H. B., and Briggs, D. E. G., 1985, The largest Cambrian animal, Anomalocaris, Burgess shale, British Columbia, Philos. Trans. R. Soc. Lond. B 309:569–609.CrossRefGoogle Scholar
  170. Wright, J., 1990, Conodont apatite: Structure and geochemistry, in: Skeletal Biomineralization: Patterns, Processes and Evolutionary Trends (J. G. Carter, ed.), Vol. 1, pp. 445–459, Van Nostrand Reinhold, New York.Google Scholar
  171. Yalden, D. W., 1985, Feeding mechanisms as evidence for cyclostome monophyly, Zool. J. Linn. Soc. 84:291–300.CrossRefGoogle Scholar
  172. Yochelson, E. L., 1970, The early Cambrian fossil Salterella conulata Clark in eastern North America, U.S. Geol Surv. Prof. Pap. 683-B:1–10.Google Scholar
  173. Yochelson, E. L., 1988, Comments and criticisms concerning Bandel’s The Reconstruction of “Hyolithes Kingi” as Annelid Worm from the Cambrian of Jordan, Mitt. Geol.-Palaeontol. Inst. Univ. Hamburg 67:135–144.Google Scholar
  174. Yochelson, E. L., and Lindemann, R. H., 1986, Considerations on systematic placement of the Styliolines (Incertae sedis: Devonian), in: Problematic Fossil Taxa (A. Hoffman and M. H. Nitecki, eds.), pp. 45–58, Oxford University Press, Oxford.Google Scholar
  175. Yochelson, E. L., Flower, R. H., and Webers, G. F., 1973, The bearing of the new Late Cambrian monoplacophoran genus Knightoconus upon the origin of the Cephalopoda, Lethaia 6:275–310.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1993

Authors and Affiliations

  • Jerzy Dzik
    • 1
  1. 1.Instytut Paleobiologii PANWarsawPoland

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