Alcock, 1895
Eyestalk with cornea small, almost immovable; epistome in a plane which is almost at right angles to the basal antennal article; rostrum present; interantennular partition present; supraorbital eave narrow; distal margin of basal antennal article at least level with, usually extending forward beyond, anterior margin of eyestalk, free or fused to front; green (antennal) gland distinct and more or less distant from junction of basal antennal article and epistome; third maxilliped with merus narrower than ischium; basal antennal article usually cylindrical or subcylindrical; upper orbit lacking a postorbital lobe or spine, eyestalk, if movable, retracting against hepatic margin. (Davie 1996)
Carapace circular to subcircular, upper orbit lacking a postorbital lobe or spine; rostrum with two spines. Eyestalk almost immovable, cornea small. Epistome in a plane which is almost at right angles to basal antennal article. Distal margin of basal antennal article by far overreaching the anterior margin of eyestalk, green (antennal) gland distinct and more or less distant from junction of basal antennal article and epistome. Third maxilliped with merus narrower than ischium. (Türkay 1995)
Type species: Physachaeus ctenurus Alcock, 1895, by designation of Griffin & Tranter, 1986.
Species treated:
Physachaeus ctenurus Alcock, 1895