Abyssochrysos

Abyssochrysos is a genus of bathyal sea snails, marine gastropod mollusks in the family Abyssochrysidae.[2]

Abyssochrysos
anatomy of Abyssochrysos melanioides removed from the shell
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Caenogastropoda
Superfamily:
Abyssochrysoidea
Family:
Abyssochrysidae
Genus:
Abyssochrysos

Tomlin, 1927[1]
Type species
Abyssochrysos melanioides Tomlin, 1927

Description

The characteristics (shell, radula and anatomy) of the species mark this genus as simple gastropods, unassigned in the clade Caenogastropoda. Their taenioglossate radula (formula: 2+1+1+1+2) is unique among the Prosobranchia because of the sickle-shaped rachidian tooth and the thick, sinuous, sharply cusped lateral teeth. They have tentacles but lack eyes. The mantle cavity goes deep (about 2½ whorls). The long, wide ctenidium is monopectinate. The pallial gonoducts are closed. The large penis-like organ is a right-dorsal mantle process.[3]

Species

Species within the genus Abyssochrysos include:

Species brought into synonymy
  • Abyssochrysos bicinctum Bouchet, 1991: synonym of Abyssochrysos bicinctus Bouchet, 1991
  • Abyssochrysos brasilianum Bouchet, 1991: synonym of Abyssochrysos brasilianus Bouchet, 1991
  • Abyssochrysos eburneum (Locard, 1897): synonym of Abyssochrysos eburneus (Locard, 1897)

References
  1. Tomlin J. R. le B. (1927). "Reports on the Marine Mollusca in the Collections of the South African Museum, II: Families Abyssochrysidae, Oocorythidae, Haliotidae, Tonnidae". Annals of the South African Museum 25(1): 77-83, 4 figures. page 77.
  2. Abyssochrysos Tomlin, 1927. Retrieved through: World Register of Marine Species on 4 May 2010.
  3. ¨Houbrick R.S. 1979. Classification and systematic relationships of the Abyssochrysidae, a relict family of bathyal snails (Prosobranchia; Gastropoda). Smithsonian Contributions to Zoology 290: 1-21
  4. Bouchet P. (1991). "New records and new species of Abyssochrysos (Mollusca, Caenogastropoda). Journal of Natural History 25(2): 305-313. doi:10.1080/00222939100770221.
  5. Abyssochrysos bicinctum Bouchet, 1991. Retrieved through: World Register of Marine Species on 4 May 2010.
  6. Abyssochrysos brasilianum Bouchet, 1991. Retrieved through: World Register of Marine Species on 4 May 2010.
  7. Abyssochrysos eburneum (Locard, 1897). Retrieved through: World Register of Marine Species on 4 May 2010.
  8. Abyssochrysos melanioides Tomlin, 1927. Retrieved through: World Register of Marine Species on 4 May 2010.
  9. Abyssochrysos melvilli (Schepman, 1909). Retrieved through: World Register of Marine Species on 4 May 2010.
  10. Killeen I. J. & Oliver P. G. (2000). "A new species of Abyssochrysos (Gastropoda: Loxonematoidea) from the Oman margin". Journal of Molluscan Studies 66(1): 95-98. doi:10.1093/mollus/66.1.95
  11. Abyssochrysos xouthos Killeen & Oliver, 2000. Retrieved through: World Register of Marine Species on 4 May 2010.
  • Bouchet P. (1991). New records and new species of Abyssochrysos (Mollusca, Caenogastropoda).' Journal of Natural History 25(2): 305-313
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