Hydrobiologia 525: 1–100, 2004. Ó 2004 Kluwer Academic Publishers. Printed in the Netherlands. 1 Taxonomic revision A revision of Australian river prawns, Macrobrachium (Crustacea: Decapoda: Palaemonidae) J. W. Short Queensland Centre for Biodiversity, Queensland Museum, P.O. Box 3300, South Brisbane, Queensland 4101, Australia Present address: BioAccess Australia, P.O. Box 10281, Adelaide St, Brisbane, Queensland 4000, Australia (Fax: +61-7-38869684, E-mail:
[email protected]) Received 8 September 2003; in revised form 2 February 2004; accepted 9 February 2004 Key word: Crustacea, Decapoda, Palaemonidae, Macrobrachium, Australia, Taxonomy Abstract A taxonomic revision of Australian Macrobrachium identified three species new to the Australian fauna – two undescribed species and one new record, viz. M. auratum sp. nov., M. koombooloomba sp. nov., and M. mammillodactylus (Thallwitz, 1892). Eight taxa previously described by Riek (1951) are recognised as new junior subjective synonyms, viz. M. adscitum adscitum, M. atactum atactum, M. atactum ischnomorphum, M. atactum sobrinum, M. australiense crassum, M. australiense cristatum, M. australiense eupharum of M. australiense Holthuis, 1950, and M. glypticum of M. handschini Roux, 1933. Apart from an erroneous type locality for a junior subjective synonym, there were no records to confirm the presence of M. australe (Gue´rin-Me´neville, 1838) on the Australian continent. In total, 13 species of Macrobrachium are recorded from the Australian continent. Keys to male developmental stages and Australian species are provided. A revised diagnosis is given for the genus. A list of 31 atypical species which do not appear to be based on fully developed males or which require re-evaluation of their generic status is provided.