Article · Wikipedia archive · Last revised Jul 1, 2026

Cirsochilus

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

Last revised
Jul 1, 2026
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Cirsochilus
Temporal range:
Cirsochilus moucharti
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Family: Colloniidae
Subfamily: Colloniinae
Genus: †Cirsochilus
Cossmann, 1888
Type species
† Cirsochilus varius
(Defrance, 1818)
Synonyms1
  • Collonia (Cirsochilus) Cossmann, 1888
  • Cirsochilus (Tipua) Marwick, 1943
  • Collonia (Cirsochilus) Cossmann, 1888
  • Tipua Marwick, 1943

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

References

  1. Cirsochilus Cossmann, 1888 †. Retrieved through: World Register of Marine Species on 13 January 2026.
  2. Cossmann, M. (1888). "Catalogue illustré des coquilles fossiles de l'Éocène des environs de Paris". Annales de la Société Royale Malacologique de Belgique (in French). 23: 72 – via Biodiversity Heritage Library.
  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)". The Paleobiology Database. Retrieved 13 January 2026.