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Ancistrobasis

Drawing with a basal and an apertural view of a shell of Ancistrobasis depressa
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	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)

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

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 a 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:

Ancistrobasis adonis Marshall, 1991
Ancistrobasis boucheti Marshall, 1991
Ancistrobasis caledonica Marshall, 1991
Ancistrobasis compsa Melvill, 1904
Ancistrobasis depressa (Dall, 1889)^[4]
Ancistrobasis dilecta Marshall, 1983
Ancistrobasis largoi Poppe, Tagaro & Dekker, 2006^[5]
Ancistrobasis monodon (Schepman, 1908)
Ancistrobasis reticulata (Philippi, 1844)^[6]
Ancistrobasis scitula Marshall, 1991
Ancistrobasis tiara Marshall, 1991
Ancistrobasis zumbii Lima, Christoffersen & Barros, 2013

Species brought into synonymy

Ancistrobasis costulata (Watson, 1879): synonym of Ancistrobasis reticulata (Philippi, 1844)
Ancistrobasis regina Marshall, 1983: synonym of Basilissopsis regina (Marshall, 1983)

References

^ 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.
^ ^a ^b Ancistrobasis Dall, 1889. Retrieved through: World Register of Marine Species on 26 March 2013.
^ 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)^{[permanent dead link‍]}
^ Ancistrobasis depressa (Dall, 1889). Retrieved through: World Register of Marine Species on 18 April 2010.
^ Ancistrobasis largoi Poppe, Tagaro & Dekker, 2006. Retrieved through: World Register of Marine Species on 18 April 2010.
^ 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

Taxon identifiers
Ancistrobasis	Wikidata: Q3167941 Wikispecies: Ancistrobasis CoL: 7NP2S EoL: 60900 GBIF: 2293652 iNaturalist: 246954 IRMNG: 1008236 ITIS: 72230 NBN: NHMSYS0000560296 NZOR: 5cb3205c-5c08-4faa-852c-3e981a62c1f8 Open Tree of Life: 2915203 Paleobiology Database: 58379 Plazi: 7B148014-4B4C-FF90-FF7A-FE45D0B8C3BE WoRMS: 138469

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