Biology:Trochorbis

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Trochorbis is a genus of freshwater snails in the family Planorbidae. The type species is Trochorbis trochoideus.

Taxonomy

This genus was orignally described as a subgenus of Planorbis, named Planorbis (Trochorbis), by William Henry Benson in 1855.[1] Later authors considered Trochorbis to be synonymous with the genus Segmentina,[2][3][4] sometimes displaying it as the subgenus Planorbis (Segmentina).[5][6] In 1945, Frank C. Baker restated the group as it currently appears: its own independent genus within the subfamily Segmentininae (now tribe Segmentinini).[7] The type species is Trochorbis trochoideus.[8][7]

The genus is hypothesized to be closely related to the genus Polypylis due to similar shell characteristics.[7]

Description

Species of Trochorbis are distinguished by a disc-shaped shell where the final (body) whorl covers most of the other whorls.[9]

Species

Species within this genus include:[8]

One species remains uncertain (incertae sedis):

  • Trochorbis anastasiae Izzatullaev, 1973

References

  1. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named og-desc
  2. ↑ Dall, W. H. (1906). "Note on some forgotten mollusk-names". The Nautilus (journal) 19 (9): 105. ISSN 0028-1344. OCLC 1759527. https://www.biodiversitylibrary.org/item/17845. 
  3. ↑ Kennard, A. S.; Woodward, B. B. (1926). Synonymy of the British non-marine Mollusca (Recent and post-tertiary). pp. 89–90. doi:10.5962/bhl.title.8325. OCLC 6389905. https://www.biodiversitylibrary.org/item/34534. 
  4. ↑ Germain, L. (1923). "Catalogue of the Planorbidae in the Indian Museum (Natural History), Calcutta" (in fr). Records of the Indian Museum 21 (3): 175. ISSN 0375-099X. OCLC 1427183. https://www.biodiversitylibrary.org/item/41874. 
  5. ↑ Preston, H. B. (1915). Shipley, A. E.. ed. The fauna of British India including Ceylon and Burma. London: Taylor & Francis. p. 125. doi:10.5962/bhl.title.100762. https://www.biodiversitylibrary.org/item/180066. 
  6. ↑ Geoffrey, N. (1878). Hand list of Mollusca in the Indian Museum, Calcutta. 1. Calcutta. p. 246. doi:10.5962/bhl.title.54249. OCLC 18790669. https://www.biodiversitylibrary.org/item/114832. 
  7. ↑ 7.0 7.1 7.2 Baker, F. C. (1945). von Cleave, H. J.. ed. The molluscan family Planorbidae. University of Illinois Press. pp. 108–109. doi:10.5962/bhl.title.7026. ISBN 978-1021493705. OCLC 843977. https://www.biodiversitylibrary.org/item/30368. 
  8. ↑ 8.0 8.1 Cite error: Invalid <ref> tag; no text was provided for refs named worms
  9. ↑ Hubendick, B. (1955). "Phylogeny in the Planorbidae". Transactions of the Zoological Society of London 28: 515. doi:10.1111/j.1096-3642.1955.tb00004.x. https://zslpublications.onlinelibrary.wiley.com/doi/epdf/10.1111/j.1096-3642.1955.tb00004.x. 
  • Bank, R. A. (2017). Classification of the Recent freshwater/brackish Gastropoda of the World. Last update: January 24th, 2018. OpenAccess publication.

Wikidata ☰ Q61679066 entry



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