Australian Biological Resources Study

Australian Faunal Directory


Regional Maps

Genus Cercodemas Selenka, 1867



Rowe, in Rowe & Gates (1995) raised Cercodemas from synonymy, based on the following features: body wall dorsally arched with tube feet in tuberculiform papillae; body wall ossicles including fenestrated spheres and deep 'baskets' with a basic quadri-locular design; tentacles 10, the two ventral-most, smaller. The universal use of the generic name Pentacta Goldfuss, 1820 (type species Pentacta doliolum (Pallus, 1766) by monotypy), as adopted by and used since H.L. Clark (1923) was rejected. The body form of the type species, Pentacta doliolum (with tube feet restricted to the ventral ambulacra but scattered dorsally, body wall ossicles comprising multi-locular knobbed plates and shallow rugose 'baskets' with a basic quadri-locular design and 10 tentacles of more or less equal size) does not accord with the majority of its supposed congeners. Pentacta sensu stricto may well be restricted to South African waters; it includes with certainty, besides the type species, Pentacta capensis Theel, 1886). The type species, and others included in Cercodemas Selenka, 1877, Colochirus Troschel, 1846 and Plesiocolochirus Cherbonnier, 1946, are not considered congeneric with Pentacta doliolum as supposed by H.L. Clark (1946), and many previous and subsequent authors




Queensland, Western Australia

Note that conversion of the original AFD map of states, drainage basins and coastal and oceanic zones to IBRA and IMCRA regions may have produced errors. The new maps will be reviewed and corrected as updates occur. The maps may not indicate the entire distribution. See further details below.
IBRA and IMCRA regions (map not available)
drainage basins and coastal and oceanic zones (map not available)


Timor Transition (1), Northern Shelf Province (25), Northwest Shelf Transition (26), Northwest Shelf Province (27), Central Western Shelf Transition (28), Central Western Shelf Province (29), Southwest Shelf Transition (30), Southwest Shelf Province (31), Great Australian Bight Shelf Transition (32), Spencer Gulf Shelf Province (33), Central Eastern Shelf Province (38), Central Eastern Shelf Transition (39), Northeast Shelf Province (40), Northeast Shelf Transition (41)

Original AFD Distribution Data

Australian Region

  • Australia
    • 200 m bathymetric: Central E coast, Central W coast, Great Australian Bight, Lower W coast, N coast, NE coast, NW coast, SW coast

Oriental Region

  • West Pacific Ocean

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)
15-Sep-2023 11-Dec-2012 MODIFIED
12-Feb-2010 (import)