CZ EN
SEARCH  

Taxon profile

species

Etrema ravella Ch. Hedley, 1922

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Neogastropoda »  family Clathurellidae »  genus Etrema

Images

Etrema ravella

Author: Hedley

Taxon in country check-lists*

* List of countries might not be complete

Description

Shell elongate biconic, a fiat sloping shoulder and a perpendicular periphery giving it a pagodiform aspect. Colour buff, sometimes with pale yellow bauds on the last whorl, on the outer lip lemon yellow, sometimes with chocolate on the pillar. Whorls seven, including the protoconch, which consists of a small rounded upstanding whorl, followed by two sharply keeled whorls. Sculpture : on the last whorl are twenty-two spirals, of which three on the periphery are most prominent; the radials are not consecutive, they increase from nine on the early whorls to fifteen on the last; they are slight near the suture, prominent on the periphery, and absent on the base; they are over-ridden by the spirals, which form deep meshes on the periphery, a double row on the last whorl and a single one above. Aperture: the prominent varix spreads a broad tooth-edged lip over the mouth; it is excavated above in a spout-like sinus; at the lip insertion is a massive coloured tubercle; within the lip are four or five entering plications ; across the columella are two transverse plaits; canal short. Length 5 mm., breadth 2,2 mm.
Hedley, C., 1922; A revision of the Australian Turridae

Interchangeable taxa

This species is related to E. elegans, but that is smaller, more slender, with an unarmed columella, and lattice sculpture on the periphery.
Hedley, C., 1922; A revision of the Australian Turridae

Distribution

Australia: Queensland 4 to 14 fathoms; Albany Passage (type) 8 fathoms; Weary Bay 5 to 10 fathoms; Hope Island; 5 fathoms; Van Diemens Inlet; 5 fathoms; off Horsey River, Gulf of Carpentaria 10 fathoms; Cape Sidmouth.
Hedley, C., 1922; A revision of the Australian Turridae
Author: Jan Delsing

Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Etrema ravella Hedley, 1922]
Data retrieved on: 23 November 2013

Contributions to BioLib

Help us to expand this encyclopedia! If you are logged in, you can add new subtaxa, vernacular and scientific names, texts, images or intertaxon relationships for this taxon.

Comments