Exomilus telescopialis

Exomilus telescopialis
Original image of a shell of Exomilus telescopialis
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Raphitomidae
Genus:	Exomilus
Species:	E. telescopialis
Binomial name
Exomilus telescopialis (Verco, 1896)
Synonyms [1]
Drillia pentagonalisVerco, 1896

Exomilus telescopialis is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. ^[1]

Description

The length of the shell attains 4.5 mm, its diameter 1.25 mm.

(Original description) The minute shell is thin. It contains six whorls, including the protoconch. The protoconch consists of ​1 ¹⁄₂ whorls, smooth, with deep impressed suture. The apex is exserted. The whorls of the spire are sloping, nearly straight, gradated, angled at junction of posterior and middle fourth. Behind this the whorl is bevelled to the suture, which is distinct and impressed. The whorls are sculptured with spiral lirae, four to six in front of the angle, two behind it, flatly rounded, equidistant, wider than the interspaces. The Longitudinal lirae are numerous, equidistant, about 20 in the penultimate whorl, narrower than the interspaces. In some specimens crossing the spiral lirae and wider than them, generally most marked and forming conspicuous costae in the second and third spire-whorls. In others they are narrower, crossed by the spiral lirae, giving a cancellated appearance. The body whorl is nearly cylindrical, angled a little below the suture and again at the periphery, below which it is excavately contracted to the base. It is provided with spiral lirae, two behind the upper angle, about seven between the angles, and nine or ten below, the most valid forming a minute carina at the lower angle, crossing or crossed by 18 to 20 wider or narrower longitudinal lirae continued to the base, though less conspicuous here. The aperture is elongately rhomboidal and wider anteriorly. The outer lip is simple, thin, crenulated, with a well-marked semi-circular sinus from the posterior angulation to the suture. The lip is lip slanting obliquely from the carina to the anterior notch. The columella is straight. The inner lip is inconspicuous except behind, where there is a columellar callus, from which springs the acute upper boundary of the sinus. The notch is simple, anterior extremity truncated obliquely to the left. Ornament uniform, rusty-brown or white. ^[2]

Distribution

This marine species is endemic to Australia and occurs off South Australia and Victoria

References

1. Exomilus telescopialis (Verco, 1896) . Retrieved through: World Register of Marine Species  on 5 April 2010.
2. Verco, J.C. 1896. Descriptions of new species of marine Mollusca of South Australia. Part I.; Transactions of the Royal Society of South Australia v. 20 (1895-1896) This article incorporates text from this source, which is in the public domain. public domain.

• Hedley, C. 1922. A revision of the Australian Turridae. Records of the Australian Museum 13(6): 213-359, pls 42-56
• Ludbrook, N.H. 1978. Quaternary molluscs of the western part of the Eucla Basin. Bulletin of the Geological Survey of Western Australia 125: 1-286

External links

• Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.
• "Exomilus telescopialis". Gastropods.com. Retrieved 16 January 2019.