A review of the scopelocheirid amphipods (Crustacea, Amphipoda, Lysianassoidea), with the description of new taxa from Australian waters Author Kilgallen, Niamh M. Australian Museum Research Institute, 6 College Street, Sydney, NSW 2010, Australia niamh.kilgallen@austmus.gov.au Author Lowry, James K. Australian Museum Research Institute, 6 College Street, Sydney, NSW 2010, Australia text Zoosystematics and Evolution 2015 2015-03-05 91 1 1 43 http://dx.doi.org/10.3897/zse.91.8440 journal article http://dx.doi.org/10.3897/zse.91.8440 1860-0743-1-1 CAFFC884904F40C2AACF12BE3A2F3ECC FF8CFFC4FFA2166F883BFF8BFFE31C49 575740 Anisocallisoma Hendrycks & Conlan, 2003 Anisocallisoma Hendrycks & Conlan, 2003: 2313. Type species. Anisocallisoma armigera Hendrycks & Conlan, 2003, by monotypy. Included species. Anisocallisoma includes one species: Anisocallisoma armigera Hendrycks & Conlan, 2003. Diagnostic description. Mandible lacinia mobilis a long, slender robust seta . Maxilla 1 inner plate with apical pappose setae only; palp 1-articulate . Maxilla 2 inner and outer plates subequal in width and in length. Maxilliped palp article 4 reduced. Gnathopod 1 coxa reduced, margins tapering distally; basis swollen; dactylus reduced, simple. Pereopods 3 and 4 carpus short, longer than wide. Pereopod 4 coxa with weakly-developed, subacutely produced posteroventral lobe . Discussion. Anisocallisoma can be distinguished from all other paracallisomines by the reduction in the number of setae of the maxilla 1 inner plate. It is most similar to Eucallisoma Barnard, 1961, and Tayabasa gen. n. They share the following characters: gnathopod 1 basis swollen, glandular; dactylus reduced, simple. It is also very similar to the new genus Austrocallisoma , but it can be distinguished from all of these taxa in lacking the distal tuft of setae on the accessory flagellum, and in having a much more weakly-developed posteroventral lobe on the pereopod 4 coxa, as well as the reduced setae on the maxilla 1.