Platorchestia Bousfield, 1982

Serejo, C. S. & Lowry, J. K., 2008, The Coastal Talitridae (Amphipoda: Talitroidea) of Southern and Western Australia, with Comments on Platorchestia platensis (Krøyer, 1845), Records of the Australian Museum 60 (2), pp. 161-206 : 189

Platorchestia Bousfield, 1982

Platorchestia Bousfield, 1982: 26 ; Jo, 1988: 160; Richardson, 1991: 186; Miyamoto & Morino, 2004: 68; Serejo, 2004: 20 .

Type species. Platorchestia platensis (Krøyer, 1845) .

Diagnosis. Antenna 2 not geniculate, occasionally sexually dimorphic. Mandible left lacinia mobilis 5-dentate. Maxillipedal palp dactylus present, reduced. Gnathopod 2 subchelate; basis narrow or slightly expanded; propodus palm posterodistal corner without protuberance. Pereopods 3–7 cuspidactylate. Pereopod 4 carpus similar in length to or significantly shorter than carpus of pereopod 3. Pereopod 6 sexually dimorphic, or not. Pereopod 7 sexually dimorphic; basis lateral sulcus present, slightly pronounced. Gills lobate and/or convoluted; gills 3–5 smaller than gills 2 and 6. Oostegites 2–5 setae with simple straight tips. Pleopods all well developed. Uropod 1 outer ramus without marginal robust setae. Uropod 2 outer ramus with marginal robust setae. Telson entire, as long as or longer than broad with 3–10 robust setae per lobe.

Species composition. Platorchestia contains 16 species: P. ashmoleorum Stock, 1996 ; P. bousfieldi Ho & Li, 2003 ; P. chathamensis Bousfield, 1982 ; P. humicola (Martens, 1868) ; P. japonica (Tattersall, 1922) ; P. joi Stock & Biernbaum, 1994 ; P. kaalensis (Barnard, 1955) ; P. lanipo Richardson, 1991 ; P. monodi Mateus et al., 1986 ; P. munmui Jo, 1988 ; P. pachypus (Derzhavin, 1937) ; P. pacifica Miyamoto & Morino, 2004 ; P. paraplatensis n.sp.; P. pickeringi (Dana, 1853) ; P. platensis (Krøyer, 1845) and P. zachsi (Derzhavin, 1937) .