Australian Museum Journal Extraordinary new subterranean isopods (Peracarida: Crustacea) from the Kimberley Region, Western Australia
- Shortform:
- Wilson and Ponder, 1992, Rec. Aust. Mus. 44(3): 279–298
- Author(s):
- Wilson, George D. F.; Ponder, Winston F.
- Year published:
- 1992
- Title:
- Extraordinary new subterranean isopods (Peracarida: Crustacea) from the Kimberley Region, Western Australia
- Serial title:
- Records of the Australian Museum
- Volume:
- 44
- Issue:
- 3
- Start page:
- 279
- End page:
- 298
- DOI:
- 10.3853/j.0067-1975.44.1992.36
- Language:
- English
- Date published:
- 05 December 1992
- Cover date:
- 05 December 1992
- ISSN:
- 0067-1975
- CODEN:
- RAUMAJ
- Publisher:
- The Australian Museum
- Place published:
- Sydney, Australia
- Subjects:
- CRUSTACEA: ISOPODA; TAXONOMY
- Digitized:
- 25 February 2009
- Available online:
- 09 March 2009
- Reference number:
- 36
- EndNote package:
- EndNote file
- Title page:
- Title page (98kb PDF)
- Complete work:
- Complete work (2512kb PDF)
Abstract
A new genus and two new species of fresh water isopods from ground waters of the Kimberley region of West Australia are described. This new genus cannot be immediately assigned to an isopod suborder or family because its unique combination of characters encompass many plesiomorphies, as well as synapomorphies with the Flabellifera sensu lato. These features include free pleonites that are subequal except for an enlarged fifth pleonite, broad natatory pleopods, genital pores on medial extensions of the coxae, five pairs of oostegites, true coxal plates, an antennal protopod of three articles, and a rudimentary second flagellum on the antennula. One of the new species, well represented in one sample, is iteroparous and breeds continuously during the winter months. Because the type localities are from limestone fossil reefs not exposed to the marine environment since the Devonian period, these isopods may be remnants of an ancient freshwater stock. Name changes of some setal types are proposed.