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Taxon profile

species

Umbilicated Murex
Rolandiella umbilicata (J.E. Tenison-Woods, 1876)

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Neogastropoda »  family Muricidae - Muricids »  genus Rolandiella

Scientific synonyms

Muricopsis umbilicatus J. E. Tennison-Woods, 1876

Images

Rolandiella umbilicata - Umbilicated Murex

Author: Verco

Rolandiella umbilicata - Umbilicated Murex

Author: Kaicher

Rolandiella umbilicata - Umbilicated Murex

Author: Macpherson & Gabriel

Rolandiella umbilicata - Umbilicated Murex

Author: Radwin & D'Attilio

Taxon in country check-lists*

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Description

The shell is of moderate size for the genus (maximum length 25 mm) and broadly fusiform. The spire is high, consisting of one convex nuclear whorl and four shouldered postnuclear whorls. The suture is moderately impressed. The body whorl is moderately large and broadly fusoid. The aperture is broad and ovate, with the barest hint of an anal sulcus. The outer apertural lip is briefly erect and finely crenulate; its inner surface is slightly flaring and weakly Urate. The columellar lip is smooth, adherent anteriorly, detached and weakly erect for its remaining length. The siphonal canal is short, bent to the left, and open at the right.
The body whorl bears eight prominent varices, each consisting of prominent portions of the spiral cords. Spiral sculpture on the body consists of six major cords and six intercalary minor cords. The canal bears a single major cord and a single minor one. Between the canal and the body is a moderately broad gap in spiral and axial sculpture. Where the cords intersect the varices, each is expanded and lifted to form a moderately prominent, blunt fold or ruffle. Shell color is white, with red-brown on the expanded portion of each varix. The aperture is
white.
Southeastern and south-central Australia and northern Tasmania.
Radwin, G.E. & D'Attilio, A., 1976. Murex Shells of the World. An Illustrated Guide to the Muricidae.
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 Rolandiella umbilicata Tenison-Woods, 1876]
Data retrieved on: 22 November 2013

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