Abyssochrysos

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

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

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

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. ↑ 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. 1 2 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.
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