Larval stages of Chorismus tuberculatus (Decapoda: Caridea: Hippolytidae) from the south western Atlantic Ocean

On this basis, the following variables showed differences between groups in their relationship with carapace length:Variable 1 number of dorsal rostral teeth 3 rostrum length 6

with four strong ramified spines and with a long plumose seta adjacent to each spine; carpus with two strong ramified spines and two distal simple small spines, and with a long

Pleonites with up to 4 posterodorsal setae; urosomites I–II with several dorsolateral spines and/or setae on posterior margin; at the protopod of uropod I 2–4 spines; telson wide

Merus unarmed, 5.6 times as long as broad; carpus about half length of merus, with two movable spines distally on flexor margin near propodus.. Propodus slightly longer than

The present specimens from Egypt belong to the Polyo- nyx sinensis group defined by Johnson ( 1958 ) based on the following characters: the carapace lacks spines on the lateral

slightly concave. Dorsal ridge conspicuous. Anterior margin with 8 to 18 short spines. Posterior margin with up to 10 spines, some of them long. Ventrolateral ridge well developed

Carapace (figs 1, 2a) very slightly widened anteriorly, longer than wide postorbitally; surface covered with very short setae; dorsal midline with two moderately small,

Diagnosis Carapace with pseudorostral and supraocular spines long, subequal; supraocular spine with distinct submedian accessory spine; gastric region with small but distinct