Biology:Cirsochilus

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Cirsochilus is an extinct genus of sea snails, marine gastropod molluscs in the family Colloniidae.[1] Fossils of the genus date to between the Cretaceous and the Quaternary periods, and are found globally.

Description

Members of the genus have a thickened inner lip, sharp edge, and a pearly shell.[2]

Taxonomy

Cirsochilus was first described by Maurice Cossmann in 1888 as a subgenus of Collonia.[2] It was raised to genus level by Jean-Michel Pacaud and Jacques Le Renard in 1995.[3]

Distribution

Fossils of the genus date to between the Cretaceous period and Quaternary period, and have been found in the Americas, Europe, Asia and Oceania.[4]

Species

Species within the genus Cirsochilus include:[1]

  • † Cirsochilus caillati (Deshayes, 1863)
  • † Cirsochilus defectus (Pezant, 1908)
  • † Cirsochilus disjunctus (Deshayes, 1863)
  • † Cirsochilus grignonensis (Deshayes, 1863)
  • † Cirsochilus jucundus (Deshayes, 1863)
  • † Cirsochilus lamarckii (A. d'Orbigny, 1850)
  • † Cirsochilus macrostoma (Deshayes, 1863)
  • † Cirsochilus moucharti Pacaud & Merle, 2017
  • † Cirsochilus obsoletus (Cossmann, 1888)
  • † Cirsochilus pilulatus Darragh, 1997
  • † Cirsochilus priscus (A. W. B. Powell, 1935)
  • † Cirsochilus ryukyuensis MacNeil, 1961
  • † Cirsochilus semperi (Deshayes, 1863)
  • † Cirsochilus tricarinatus (Laws, 1939)
  • † Cirsochilus tricincta (P. Marshall, 1919)
  • † Cirsochilus varius (Defrance, 1818)

References

  1. ↑ 1.0 1.1 Cirsochilus Cossmann, 1888 †. Retrieved through: World Register of Marine Species on 13 January 2026.
  2. ↑ 2.0 2.1 Cossmann, M. (1888). "Catalogue illustré des coquilles fossiles de l'Éocène des environs de Paris" (in French). Annales de la Société Royale Malacologique de Belgique 23: 72. https://www.biodiversitylibrary.org/page/5609343. 
  3. ↑ Pacaud, J.M.; Le Renard, J. (1995). "Révision des Mollusques paléogènes du Bassin de Paris. IV- Liste systématique actualisée". Cossmanniana 3 (4): 151-187. 
  4. ↑ "†Cirsochilus Cossmann 1888 (snail)". https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=8667. 

Wikidata ☰ Q28074259 entry



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