Basilissopsis

Basilissopsis is a genus of sea snails, marine gastropod mollusks in the family Seguenziidae.[1]

Basilissopsis
Shell of Basilissopsis charcoti (holotype at MNHN, Paris)
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Superfamily: Seguenzioidea
Family: Seguenziidae
Subfamily: Seguenziinae
Genus: Basilissopsis
Dautzenberg & Fischer, 1897
Type species
Basilissopsis watsoni
Dautzenberg & H. Fischer, 1897

In 1897 Dautzenberg and Fischer created this new genus for their specimen of Basilissopsis watsoni, based on the shell characteristics of discolored specimens that were non-nacreous and lacked labral sinuses.[2] This was however contradicted later by the discovery of other species in this genus that possess nacre and labral sinuses. This puts this genus in the family Seguenziidae.[3]

Description

Nothing is known of the anatomy of the soft body in these species. The conical shell has peripheral carina and collabral axial riblets. All whorls contain midwhorl angulation but spiral lirae are absent. The U-shaped posterior sinus is shallow. There is no anterolateral sinus. A basal sinus is present. A columellar sinus is lacking. The aperture has a rhomboidal shape. A columellar tooth is lacking. The umbilicus contains a septum. The shell has no microsculpture. There are no data about the radula.[3]

Species

Species within the genus Basilissopsis include:

References
  1. Basilissopsis Dautzenberg & Fischer, 1897. Retrieved through: World Register of Marine Species on 26 March 2013.
  2. Dautzenberg and H. Fischer. 1897. Campagnes scientifiques de S. A. Ie Prince Albert l de Monaco. Diagnoses d'especes nouvelles de gasteropodes. Bull. Soc. Zool. Fr. 22: 37-45.
  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. Basilissopsis hakuhoae Kurihara & Ohta, 2008. Retrieved through: World Register of Marine Species on 18 April 2010.
  5. Basilissopsis rhyssa (Dall, 1927). Retrieved through: World Register of Marine Species on 18 April 2010.
  6. Basilissopsis watsoni Dautzenberg & H. Fischer, 1897. 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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