Ancistrobasis

Ancistrobasis is a genus of sea snails, marine gastropod mollusks in the family Seguenziidae.[2]

Ancistrobasis
Drawing with a basal and an apertural view of a shell of Ancistrobasis depressa
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Superfamily: Seguenzioidea
Family: Seguenziidae
Subfamily: Seguenziinae
Genus: Ancistrobasis
Dall, 1889 [1]
Type species
Basilissa costulata
Watson, R.B., 1879
Species

See text

Synonyms[2]

Basilissa (Ancistrobasis) Dall, 1889 (original rank)

Dall (1889) regarded (with some doubt) Ancistrobasis as a section of the closely related genus Basilissa Watson, 1879.

Description

This genus contains the dentate forms of species formerly included in the genus Basilissa.

Shell: The conical shell shows peripheral carina and collabral axial riblets. The midwhorl angulation and the spiral lirae are present on all whorls. The posterior sinus depth is shallow. The posterior sinus has an U-shape. The anterolateral sinus is absent. The rhomboidal aperture contains a basal and columellar sinus. The umbilical septum (a transverse plate secreted with early formed whorls of the shell) is absent. The shell contains pustulate microsculpture.

Radula: The rachidian tooth is broader than high with lateral wings prominent. The lateral tooth cusp is broad. The radula contains less than 10 marginal tooth pairs.[3]

Species

Species within the genus Ancistrobasis include:

Species brought into synonymy
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References
  1. Dall, W. H (1889). "Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877-1878) and in the Caribbean Sea (1879-1880), by the US Coast Survey steamer “Blake†XXIX. Report on the Mollusca. Pt. 2, Gastropoda and Scaphopoda". Bulletin of the Museum of Comparative Zoology at Harvard College. 18: 1–492.
  2. Ancistrobasis Dall, 1889. Retrieved through: World Register of Marine Species on 26 March 2013.
  3. James F. Quinn Jr., (1991), Systematic Position of Basilissopsis and Guttula, and a Discussion of the Phylogeny of the Seguenzioidea (Gastropoda: Prosobranchia), Bulletin of Marine Science, Volume 49, Numbers 1-2, September 1991 , pp. 575-598(24)
  4. Ancistrobasis depressa (Dall, 1889). Retrieved through: World Register of Marine Species on 18 April 2010.
  5. Ancistrobasis largoi Poppe, Tagaro & Dekker, 2006. Retrieved through: World Register of Marine Species on 18 April 2010.
  6. Ancistrobasis reticulata (Philippi, 1844). Retrieved through: World Register of Marine Species on 18 April 2010.
  • Marshall B.A. (1991). Mollusca Gastropoda : Seguenziidae from New Caledonia and the Loyalty Islands. In A. Crosnier & P. Bouchet (Eds) Résultats des campagnes Musorstom, vol. 7. Mémoires du Muséum National d'Histoire Naturelle, A, 150:41-109
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