Periclimenoides Bruce, 1990

Šobáňová, Anna, Lin, Chia-Wei & Ďuriš, Zdeněk, 2017, Periclimenoides tyrannodentatus, a new species of symbiotic shrimps (Crustacea: Decapoda: Palaemonidae) from Taiwan, Zootaxa 4363 (2), pp. 281-290 : 289

Key to the identification of the known species of the genus Periclimenoides Bruce, 1990

1. Dactylus of ambulatory pereiopods biunguiculate, with distoventral tooth of corpus long, obtuse; rostrum with acute distoventral tooth; carpocerite far exceeding scaphocerite; first pereiopods chelae elongate and feebly subspatulate, dactylus without lateral pectination; dorsal telson spines distinctly smaller than 0.1 of telson length, distal pair placed posterior to 0.5 of telson length........................................................................... P. socotrae Bruce, 2006

- Dactylus of ambulatory pereiopods simple; rostrum unarmed ventrally; carpocerite not exceeding scaphocerite; first pereiopods chelae stout, distinctly subspatulate, dactylus laterally pectinate; dorsal telson spines larger than 0.1 of telson length, both pairs placed on anterior half of telson...................................................................... 2

2. Second pereiopod minor chela similar in shape to major chela, merus of minor second pereiopod chela provided with granules ventrally; first pereiopod carpus long, more than 1.5 times longer than first pereiopod chela length; incisor process of mandible bilobed............................................................ P. odontodactylus ( Fujino & Miyake, 1968)

- Second pereiopod minor chela dissimilar in shape to major chela, fingers distal half of cutting edge with denticles increasing in size and overlapping cutting edge distally, fingers terminating with strong apical tooth, merus of minor second pereiopod chela not granulate ventrally; first pereiopod carpus shorter, less than 1.5 times longer than first pereiopod chela length; incisor process of mandible tridentate......................................................... P. tyrannodentatus sp. nov.