Heterocithara transenna

Heterocithara transenna is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.[1]

Heterocithara transenna
Original image of a shell of Heterocithara transenna
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Conoidea
Family: Mangeliidae
Genus: Heterocithara
Species:
H. transenna
Binomial name
Heterocithara transenna
Hedley, 1922

Description

The length of the shell attains 5 mm, its diameter 2 mm.

(Original description) The small, very solid shell has an ovate-acuminate shape and is turreted. Its colour is faded to a uniform gray. It contains 6 whorls. The protoconch is composed of two small smooth elevated whorls. The sculpture shows radials that are prominent perpendicular discontinuous ribs, which are dislocated at but continue on the snout;.tTey are nodose at, the passage of the spirals, and wider spaced on the body whorl, being set at the rate of ten on the penultimate whorl and eight on the body whorl. The spirals are strong evenly-spaced threads, nine on the body whorl and three on the one before. The aperture contains a broad and prominent varix, almost closing up the mouth. The sinus is open and rather shallow. The siphonal canal is a mere notch.[2]

Distribution

This marine species is endemic to Australia and occurs off Queensland.

References
  1. WoRMS (2009). Heterocithara transenna Hedley, 1922. In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=434008 on 2017-07-17
  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.
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