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.
| Cirsochilus Temporal range: | |
|---|---|
 | |
| Cirsochilus moucharti | |
Scientific 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) | |
| Synonyms[1] | |
| |
Description
editMembers of the genus have a thickened inner lip, sharp edge, and a pearly shell.[2]
Taxonomy
editCirsochilus 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
editFossils 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
editSpecies 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)
Gallery
edit
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References
edit- 1 2 3 Cirsochilus Cossmann, 1888 †. Retrieved through: World Register of Marine Species on 13 January 2026.
- 1 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.
- ↑ Pacaud, J.M.; Le Renard, J. (1995). "Révision des Mollusques paléogènes du Bassin de Paris. IV- Liste systématique actualisée". Cossmanniana. 3 (4): 151–187.
- ↑ "†Cirsochilus Cossmann 1888 (snail)". The Paleobiology Database. Retrieved 13 January 2026.