Australian Biological Resources Study

Australian Faunal Directory

Family Retusidae: <i>Retusa pelyx</i> (from Beesley, Ross & Wells 1998) [R. Plant]

Family Retusidae: Retusa pelyx (from Beesley, Ross & Wells 1998) [R. Plant]

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Family RETUSIDAE Thiele, 1925

Introduction

Most retusids are cylindrical with depressed spire, very similar in shell shape to some smaller cylichnids. Some are very pyriform or spindle-shaped. A few retusids retain a small operculum, far smaller than the shell aperture into which the animal retracts. The retusid animal is small, one quarter to one third the shell length, with a pair of rounded lobes projecting from the rear edge of the head on to the anterior shell. All retusids lack a radula. When present, the three gastral plates each have a pimpled, dimpled or crested inner face. Retusids can be especially abundant in intertidal and shallow water, mud and sandy-mud flats. Compiled from Burn (in press).

 

History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
30-Nov-2011 OPISTHOBRANCHIA 30-Nov-2011 MOVED Dr Robin Wilson
11-Jan-2016 24-Nov-2011 MODIFIED
24-Mar-2011 (import)