''Clavus isibopho'' is a species of

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

, a marine

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk in the family Drilliidae.Bouchet, P. (2015). Clavus isibopho (Kilburn, 1988). In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=833794 on 2016-08-13

Description

The length of the shell attains , its diameter . The claviform shell is relatively broad with six strongly convex

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral ...

s in the teleoconch and a pale peripheral band. The whorls are not shouldered. The axial ribs weaken below the suture and do not undulate on the base. The brown base of the

body whorl The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the b ...

lacks a row of pustules. The terminal varix is strong. The subsutural region is not contrastingly dark. The spiral threads are microscopic or absent, except 6–7 on the rostrum. The aperture is oblong-ovate. The outer lip is thin and slightly sinuous. The

siphonal canal The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water is ...

is wide and short and not dorsally notched. The

anal sinus The anal sinuses (rectal sinuses) are furrows in the anal canal, that separate the anal columns from one another. The anal sinuses end below in small valve-like folds, termed anal valves The anal valves are small valve-like folds at the lower ends ...

is U-shaped.Kilburn R.N. (1988). ''Turridae (Mollusca: Gastropoda) of southern Africa and Mozambique. Part 4. Subfamilies Drillinae, Crassispirinae and Strictispirinae''. Annals of the Natal Museum. 29(1): 167–320. page(s): 190, figs 7, 97-100

References

{{DEFAULTSORT:Clavus Isibopho isibopho Endemic molluscs of South Africa gastropods described in 1988