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The first skiff beetle (Coleoptera: Myxophaga: Hydroscaphidae) from Early Cretaceous Jehol Biota

  • Chenyang Cai (a1), Andrew E. Z. Short (a2) and Diying Huang (a1)


The first skiff beetle fossil and earliest myxophagan, Hydroscapha jeholensis n. sp., is described and illustrated on the basis of a single specimen from the Lower Cretaceous Yixian Formation at Huangbanjigou of Beipiao City, Liaoning Province, Northeastern China. Based on the combination of diagnostic characters of this specimen (e.g., minute and fusiform body, short elytra, tapered abdomen, separated meso- and metacoxae, and 3-segmented tarsi), we suggest that it is a definitive representative of Hydroscaphidae belonging to the widespread hydroscaphid genus Hydroscapha LeConte, 1874. It also represents the only impression fossil of the beetle suborder Myxophaga. This find displays great significance for shedding light on the preservation of the minute aquatic beetles, since it is the first well-preserved impression fossil reported for the suborder, rather than amber inclusion.



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Beutel, R. G. 1999. Phylogenetic analysis of Myxophaga (Coleoptera) with a redescription of Lepicerus horni (Lepiceridae). Zoologischer Anzeiger, 237:291308.
Beutel, R. G., Maddison, D. R., and Haas, A. 1999. Phylogenetic analysis of Myxophaga (Coleoptera) using larval characters. Systematic Entomology, 24:171192.
Campbell, J. M. 1976. Revision of Genus Sepedophilus Gistel (Coleoptera, Staphylinidae) of America North of Mexico. Memoirs of the Entomological Society of Canada, 99:189.
Campbell, J. M. 1993. A Revision of the Genera Bryoporus Kraatz and Bryophacis Reitter and two new related genera from America North of Mexico (Coleoptera, Staphylinidae, Tachyporinae). Memoirs of the Entomological Society of Canada, 166:385.
Chang, M. M. 2003. The Jehol Biota: The emergence of feathered dinosaurs, beaked birds and flowering plants. Shanghai Scientific and Technical Publishers, Shanghai, 208 p. (In Chinese)
Crowson, R. A. 1955. The Natural Classification of the families of Coleopetera. Nathaniel Lloyd and Co., London, 187 p.
Falamarzi, S., Pütz, A., Heidari, M., and Nasserzadeh, H. 2010. Confirmed occurrence of Hydroscapha granulum in Iran, with notes on its biology (Coleoptera: Myxophaga: Hydroscaphidae). Acta Entomologica Musei Nationalis Pragae, 50:97106.
Fikáček, M. and Šípková, H. 2009. New Asian Hydroscapha, with comments on male-female association of co-occuring species (Coleoptera, Myxophaga, Hydroscaphidae). Zootaxa, 2286:3148.
Ge, S. Q., Friedrich, F., and Beutel, R. G. 2010. On the systematic position and taxonomic rank of the extinct myxophagan dagger Haplochelus (Coleoptera). Insect Systematics and Evolution, 41:329338.
Gusarov, V. I. 2000. Mesotachyporus puer, a new genus and species of Cretaceous Tachyporinae (Coleoptera: Staphylinidae) from New Jersey amber, p. 255258. InGrimaldi, D. A.(ed.), Studies on Fossils in Amber, with Particular Reference to the Cretaceous of New Jersey. Backhuys, Leiden.
Hall, W. E. 2000. Hydroscaphidae LeConte, 1874, p. 2729. InArnett, R. H. and Thomas, M. C.(eds.), American Beetles. Vol. 1, Archostemata Myxophaga, Adephaga, Polyphaga: Staphyliniformia. CRC Press, Boca Raton.
Hall, W. E. and Short, A. E. Z. 2010. A new species of Hydroscapha LeConte from northwestern Venezuela (Coleoptera: Myxophaga: Hydroscaphidae). Zootaxa, 2358:4956.
Kirejtshuk, A. G. 2009. A new genus and species of Sphaeriusidae (Coleoptera, Myxophaga) from Lower Cretaceous Burmese amber. Denisia, 26:99102.
Kirejtshuk, A. G. and Poinar, G. 2006. Haplochelidae, a new family of cretaceous beetles (Coleoptera: Myxophaga) from Burmese amber. Proceedings of the Entomological Society of Washington, 108:155164.
Leconte, J. L. 1874. Descriptions of new Coleoptera chiefly from the Pacific slope of North America. Transactions of the American Entomological Society, 5:4372.
Linnaeus, C. 1758. Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Editio decima, reformata. L. Salvii, Holmiae, 1, 824 p.
Reichardt, H. 1973. A critical study of the suborder Myxophaga, with a taxonomic reversion of the Brazilian Torridincolidae and Hydroscaphidae (Coleoptera). Arquivos de Zoologia, 24:73162.
Reichardt, H. and Hinton, H. E. 1976. On the New World beetles of the family Hydroscaphidae. Papéis Avulsos de Zoologia, São Paulo, 30:124.
Short, A. E. Z., Joly, L. J., and Garcia, M. 2010. Discovery of the skiff beetle genus Yara Reichardt and Hinton (Coleoptera: Myxophaga: Hydroscaphidae) in Venezuela, with description of a new species. Coleopterists Bulletin, 64:151156.

The first skiff beetle (Coleoptera: Myxophaga: Hydroscaphidae) from Early Cretaceous Jehol Biota

  • Chenyang Cai (a1), Andrew E. Z. Short (a2) and Diying Huang (a1)


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