Exomilus lutarius

Exomilus lutarius is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.[1] [2]

Exomilus lutarius
Original image of a shell of Exomilus lutarius
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Caenogastropoda
Clade: Hypsogastropoda
Clade: Neogastropoda
Superfamily: Conoidea
Family: Raphitomidae
Genus: Exomilus
Species:
E. lutarius
Binomial name
Exomilus lutarius
(Hedley, 1907)
Synonyms[1]

Mangelia lutaria Hedley, 1907

Description

The length of the shell attains 3 mm, its diameter 1.15 mm.

(Original description) The small, solid shell is cylindrical and abruptly truncate above. It contains five whorls, three forming the protoconch, sloping on the shoulder, perpendicular at the side, and concave at the base. The colour of the shell is grey (? bleached).

The sculpture consists of deep narrow pits are formed by the intersection of radial and spiral sculpture. The radials are strong, prominent and perpendicular. The ribs are continuous, about a dozen to a whorl, knotted at the crossing of the spirals, which number four on the upper and twelve on the lower whorl. The spiral defines the basal angle larger and more prominent.

Protoconch : first whorl wound oblique to the axis of the main shell, the second overhanging the third, appearing as if the apex was wrapped in a turban.

The aperture is long, narrow, fortified by a heavy varix, in the anterior angle of which is excavated a deep sinus. The columella is nearly straight, overlaid by a slight callus. The siphonal canal is very short and wide. [3]

Distribution

This marine species is endemic to Australia and occurs off New South Wales.

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References
  1. Exomilus lutaria (Hedley, 1907). Retrieved through: World Register of Marine Species on 5 April 2010.
  2. Hedley, C. 1922. A revision of the Australian Turridae. Records of the Australian Museum 13(6): 213-359, pls 42-56 This article incorporates text from this source, which is in the public domain.
  3. Hedley, C. 1907. The results of deep sea investigation in the Tasman Sea. Mollusca from eighty fathoms off Narrabeen.; Records of the Australian Museum v. 6 (1907) This article incorporates text from this source, which is in the public domain.
  • Laseron, C. 1954. Revision of the New South Wales Turridae (Mollusca). Australian Zoological Handbook. Sydney : Royal Zoological Society of New South Wales pp. 56, pls 1–12.
  • Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.
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