Chrysostoma

Chrysostoma is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.[1][2]

Chrysostoma
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Trochidae
Genus: Chrysostoma
Swainson, 1840
Type species
Turbo nicobaricus
Gmelin, 1791

Description

The solid, thick shell has a globose shape. The spire is very short . The aperture is rounded. The parietal wall bears a heavy callus which wholly or almost covers the narrow umbilicus.[3]

Species

Species within the genus Chrysostoma include:[1]

Species brought into synonymy
gollark: Not that you would want to write that unpredicatedly.
gollark: You can write a rule `+[a, (b+c)]` but not `_[a, 0]` to `_[a]` for arbitrary `_`, basically.
gollark: It isn't... able to be generic over heads of expressions, roughly.
gollark: If I have expression rewrite rules which can go both ways, it would take arbitrarily large amounts of time to do anything.
gollark: There is insufficient expressive power to write the chain rule.

References
  1. Bouchet, P. (2012). Chrysostoma Swainson, 1840. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=225491 on 2012-11-23
  2. Vaught, K.C. (1989). A classification of the living Mollusca. American Malacologists: Melbourne, FL (USA). ISBN 0-915826-22-4. XII, 195 pp.
  3. Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
  • MacNeil, F.S., 1960. Tertiary and Quaternary Gastropoda of Okinawa. U.S. Geol. S. Professional Pa., 339:0-0
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