Borsonia timorensis

Borsonia timorensis is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.[1]

Borsonia timorensis
Original image of a shell of Borsonia timorensis
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Conoidea
Family: Borsoniidae
Genus: Borsonia
Species:
B. timorensis
Binomial name
Borsonia timorensis
(M.M. Schepman, 1913)
Synonyms[1]
  • Surcula timorensis Schepman, 1913 (original combination)

Description

The height of the shell attains 53 mm.

(Original description) The thin shell has an elongately fusiform shape, with a rather short siphonal canal. its color is dirty white. The nucleus is wanting. The 9 remaining whorls are divided in 2 parts, of which the upper part is excavated, slightly convex in itself in last 2 whorls. The lower part of each whorl shows rounded, oblique axial ribs, disappearing on the body whorl, where there are only traces on ventral side. These ribs number eleven on penultimate whorl. The finer sculpture consists of fine and coarse growth striae and spiral ones, stronger below the suture, across the convex ribbed part, fainter near the base. The aperture is elongated and angular above. The peristome is thin, with a wide, shallow sinus, just below the suture, then strongly protracted. The columellar margin is rather straight, with a faint fold at its upper half, not very conspicuous in the front view, with a rather thin, smooth layer of enamel. The siphonal canal is wide, slightly directed to the left. The body whorl is regularly attenuated towards its base.[2]

Distribution

This marine species occurs in the Timor Sea, Indonesia.

References
  1. WoRMS (2015). Borsonia timorensis (Schepman, 1913). In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=433159 on 2016-03-02
  2. Schepman, 1913. The prosobranchia of the Siboga expedition. Part IV -V - VI: Toxoglossa; p. 423 (described as Surcula timorensis)
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