Clionella semicostata

Clionella semicostata is a species of sea snail, a marine gastropod mollusk in the family Clavatulidae.[1][2]

Clionella semicostata
Four shells of Clionella semicostata (museum specimens at Naturalis Biodiversity Center)
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Conoidea
Family: Clavatulidae
Genus: Clionella
Species:
C. semicostata
Binomial name
Clionella semicostata
(Kiener, 1840)
Synonyms[1]
  • Clavatula semicostata (Kiener, 1840)
  • Drillia halidoma Bartsch, P., 1915
  • Pleurotoma nux Reeve, L.A., 1845
  • Pleurotoma semicostata Kiener, 1840 (original combination)
  • Pleurotoma sigillata Reeve, L.A., 1846
  • Pleurotoma (Clionella) sigillata Weinkauff, 1876

Description

The size of an adult shell varies between 15 mm and 32 mm. The whorls are with shallow channel above. The shoulder angle is situated above or at the middle of the whorl. The body whorl has an obconical shape. The yellowish-brown to dark brown periphery of the shell is nodulous by the terminations of short, oblique, rather distant axial ribs (numbering 12-14). The spiral striae are faint to distinct. The anal sinus is broad. The color of the shell is a uniform light yellowish brown.[3]

Distribution

This marine species occurs from False Bay to Cape Agulhas, South Africa

References
Clionella semicostata (holotype of Drillia halidoma at the Smithsonian Institution)
  1. Clionella semicostata (Kiener, 1840). Retrieved through: World Register of Marine Species on 4 April 2010.
  2. P. Bouchet; Yu. I. Kantor; A. Sysoev; N. Puillandre (2011). "A new operational classification of the Conoidea (Gastropoda)". Journal of Molluscan Studies. 77 (3): 273–308. doi:10.1093/mollus/eyr017.
  3. George Washington Tryon, Manual of Conchology vol. VI p. 233; 1884
  • Kilburn, R.N. (1985). Turridae (Mollusca: Gastropoda) of southern Africa and Mozambique. Part 2. Subfamily Clavatulinae. Ann. Natal Mus. 26(2), 417–470.
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