Abstract
The morphology of Ilyocryptus brevidentatus Ekman, 1905 is redescribed based on the syntypes from Falklands and South Georgia, and additional material from Signy Island and southern portion of Chile and Argentina. It is not possible to select a lectotype, and specify the exact type locality, because Ekman, or a subsequent investigator, mixed all specimens from all localities in one tube. A series of unique traits in the thoracic limbs of this species was revealed. A preliminary key for the discrimination of all adequately studied species of Ilyocryptus based exclusively on characters of their limbs is proposed. All Australian records of I. brevidentatus seem to apply to other species, superficially similar to it.
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References
Alonso, M., 1996. Fauna Iberica. Crustacea Branchiopoda. Mus. Nac. Cien. Natur. Consejo Superior de Investigaciones Cientificas, Madrid, 486 pp.
Cervantes-Martínez, A., M. Gutiérrez-Aguirre & M. Elías-Gutiérrez, 2000. Description of Ilyocryptus nevadensis (Branchiopoda, Anomopoda), a new species from a high altitude crater lake in the volcano Nevado de Toluca, Mexico. Crustaceana 73: 311-321.
Dumont, H. J. & K. Martens, 1996. The freshwater microcrustacea of Easter Island. Hydrobiologia 325: 83-99.
Ekman, S., 1905. Cladoceren und Copepoden aus antarktischen und subantarktishen Binnengewässern. Wiss. Ergebn. Schwed. Sudpolar Expedition 1901–1903. 5(4): 1-40.
Frey, D. G., 1988. Alona weinecki Studer on the subantarctic islands, not Alona rectangula Sars (Chydoridae, Cladocera). Limnol. Oceanogr. 33: 1386-1411.
Frey, D. G., 1993. Species of Pleuroxus (Anomopoda, Chydoridae) from the subantartic islands and southernmost South America: a partial unravelling of the Pleuroxus aduncus problem. Hydrobiologia 262: 145-188.
Heywood, R. B., 1967. The freshwater lakes of Signy Island and their fauna. Phil. Trans. r. Soc., Lond. (B) 252: 347-362.
Kotov, A. A., 1999. Morphology and variability of Ilyocryptus agilis Kurz, 1878 and Ilyocryptus cf. cuneatus Štifter, 1988 from Lake Glubokoe, Moscow Area, central Russia (Branchiopoda: Anomopoda). Arthropoda Selecta 8(1): 3-22.
Kotov, A. A., 2000. Redescription of Ilyocryptus tuberculatus Brehm, 1913 (Anomopoda, Branchiopoda). Hydrobiologia 428: 115-128.
Kotov, A. A. & H. J. Dumont, 2000. Analysis of the Ilyocryptus spinifer s. lat. species group (Anomopoda, Branchiopoda), with description of a new species. Hydrobiologia 428: 85-113.
Kotov, A. A. & B. V. Timms, 1998. Ilyocryptus smirnovi n. sp. (Branchiopoda, Anomopoda)-a new member of the species group Ilyocryptus brevidentatus s. lat. from Australia. Hydrobiologia 380: 127-139.
Kotov, A. A. & J. L. Williams, 2000. Ilyocryptus spinifer Herrick 1882 (Anomopoda, Branchiopoda): a redescription based on North American material and designation of a neotype from Minnesota. Hydrobiologia 428: 67-84.
Kotov A. A., H. J. Dumont & K. Vandamme, 2002. Redescription of Ilyocryptus sarsi Stingelin, 1913. Hydrobiologia 472: 207-222.
Kotov, A. A., M. Elías-Gutiérrez & J. L. Williams, 2002. A preliminary revision of sordidus-like species of Ilyocryptus Sars, 1862 (Anomopoda, Branchiopoda) in North America, with description of I. bernerae n. sp. Hydrobiologia 472: 141-176.
Olivier, S. R., 1962. Los cladóceros Argentinos, con clave de las spesies, notas biológicas y distribución geográfica. Rev. Mus. La Plata, n. s., sec. Zool. 7: 173-269.
Paggi, J. C., 1987. Estudios limnológicos en la isla Decepción, Shetland del Sur, Antártida: aspectos taxonómicos de los Crustáceos del zooplancton. Dir. Nac. Antart., Contribución No. 338: 1-34.
Paggi, J. C., 1989. A new species of Ilyocryptus (Anomopoda: Macrothricidae) from the River Parana basin, Argentina. Hydrobiologia 182: 239-248.
Paggi, J. C., 1992. A new species of Ilyocryptus (Anomopoda: Macrothricidae) from Argentina. Hydrobiologia 231: 141-151.
Paggi, J. C., 1993. Análisis preliminar de la distribución geográfica de los cladóceros suramericanos. In Boltovskoy, A. & H. L. López (eds), Conferencias de Limnología. Instituto de Limnología 'Dr. R.A. Ringuelet'. La Plata: 107-113.
Paggi, J. C., 1998. ‘Cladocera’ (Anomopoda y Ctenopoda). In Morrone, J. J. & S. Coscarón (eds), Biodiversidad de Artrópodos Argentinos. Una Perspectiva Biotaxonómica. La Plata, Ediciones Sur: 507-518.
Pugh, P. J. A., H. J. G. Dartnall & S. J. McInnes, 2002. The nonmarine Crustacea of Antarctica and the Islands of the Southern Ocean: biodiversity and biogeography. J. nat Hist., Lond. 36: 1047-1103.
Sars, G. O., 1909. Freshwater Entomostraca from South-Georgia. Arch. Math. Naturv. 30(5): 14-17.
Shiel, R. J. & J. A. Dickson. Cladocera recorded from Australia. Trans. r. Soc. S. Aust. 119: 29-40.
Smirnov, N. N., 1971. Chydoridae fauni mira. Fauna SSSR. Rakoobraznie 1(2): 1-531. (Chydoridae of the world fauna. In Russian).
Smirnov, N. N., 1976. Macrothricidae i Moinidae fauni mira. Fauna SSSR. Rakoobraznie 1(3): 1-237 (Macrothricidae and Moinidae of the world. In Russian).
Smirnov, N. N., 1995. Check-list of the Australian Cladocera (Crustacea). Arthropoda Selecta 4(1): 3-6.
Smirnov, N. N. & B. V. Timms, 1983. A revision of the Australian Cladocera (Crustacea). Records of the Australian Museum. Suppl. 1: 1-132.
Štifter, P., 1988. Two new species of the genus Ilyocryptus (Cladocera, Crustacea) confused with I. sordidus Lievin. Vést. èesk. Spoleè. zool. 52: 290-301.
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Kotov, A.A., Paggi, J.C. & Elías-Gutiérrez, M. Redescription of Ilyocryptus brevidentatus Ekman, 1905 (Anomopoda, Cladocera, Branchiopoda). Hydrobiologia 481, 1–18 (2002). https://doi.org/10.1023/A:1021210414160
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DOI: https://doi.org/10.1023/A:1021210414160