Australian Biological Resources Study

Australian Faunal Directory


Regional Maps


Compiler and date details

July 2012 - Tim O’Hara, Museum Victoria

F.W.E. Rowe & J. Gates, Australian Museum, Sydney, New South Wales, Australia (1995) Updated (2001) by Tim O'Hara, Museum Victoria, Carlton, Victoria, Australia


The family Caymanostellidae is circum-tropical to temperate in distribution. Two genera and four species are known. Both genera are recorded in Australian waters, each represented by a single species.

The family is distinguished from others in the order Valvatida by the following combination of character states: body pentagonal to sub-circular in outline, slightly convex aborally, with imbricating plates, body may be invested in thick skin; inferomarginal plates delimit body margin; actino-lateral plates absent in Recent taxa; adambulacral plates characteristically bar-like, extending between ambulacral and inferomarginal plates; membranous triangular 'window' occurs actinally with or without spicules and through which gonads can be seen internally; sexually dimorphic, male gonopores smaller than female gonopores; the gonopores associated either through, marginally or between proximal-most pair of superomarginal plates in interradial angle; skeletal plates bear granuliform to elongate spinelets, inferomarginal plates bear stouter spines forming marginal fringe to body.


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)
12-Feb-2012 12-Feb-2012 MOVED
12-Feb-2010 (import)