Austrocarina recta
Austrocarina recta is a species of small sea snail, a marine gastropod mollusk in the family Horaiclavidae. It was formerly included within the family Pseudomelatomidae. Description
The length of the shell attains 6 mm, its diameter 2.5 mm. (Original description) The thin, tall and narrow shell has a pagodiform shape. The body whorl has a median cylindrical area, angled above and below. The keel along the lower angle is buried by the suture of the following whorl, that along the upper angle projects more and ascends the spire to the protoconch, where it suddenly ceases. Above the upper keel the whorl slopes to the suture, below the lower the base is concavely excavated. The colour of the shell is pale yellow. It contains four whorls, plus the protoconch. These whorls are wound obliquely..The topmost whorl is undulated by about sixteen broad radial ribs, which disappear on the next whorl. Fine and coarse spiral threads alternate over the whole surface, and are crossed by fine growth lines. The protoconch is exsert, white, smooth and two-whorled. The aperture is broad. The outer lip is simple. There is no apparent sinus. The short siphonal canal is open and straight. Distribution
This marine species is endemic to Australia and occurs off New South Wales, Queensland, Tasmania and Victoria. References

 Hedley, C. 1922. A revision of the Australian Turridae. Records of the Australian Museum 13(6): 213–359, pls 42–56
 May, W.L. 1923. An Illustrated Index of Tasmanian Shells: with 47 plates and 1052 species. Hobart : Government Printer 100 pp. Laseron, C. 1954. Revision of the New South Wales Turridae (Mollusca). Australian Zoological Handbook. Sydney : Royal Zoological Society of New South Wales 1–56, pls 1–12. Powell, A.W.B. 1969. The family Turridae in the Indo-Pacific. Part. 2. The subfamily Turriculinae. Indo-Pacific Mollusca 2(10): 207–415, pls 188–324 
 Wilson, B. 1994. Australian Marine Shells. Prosobranch Gastropods. Kallaroo, WA : Odyssey Publishing Vol. 2 370 pp. External links
  Tucker, J.K. 2004 Catalog of recent and fossil turrids (Mollusca: Gastropoda). Zootaxa 682:1–1295. recta
Gastropods of Australia