Discerceis 2 1 1 



Subfamily Dynameninae Bowman, 1981 



DIAGNOSIS Cephalon not fused with pereonite 1. Pereopods 1 and 2 am- 

 bulatory. Pleopods 4 and 5, both rami having branchial pleats. Pleopod 4, 

 exopod unjointed, usually lacking setae, endopod with few setae at most. 

 Pleotelsonic apex often with terminal notch or foramen, especially in 6. 

 Uropods biramous. 



Cerceis H. Milne Edwards, 1840 



DIAGNOSIS Mouthparts metamorphosed in 9. Broodpouch of four pairs of 

 oostegites on pereonites 1-4, overlapping in midline. Brood held in four pairs 

 of internal pouches. Pockets absent. 



^'Cerceis" carinata Glynn, 1970 

 Figure 93A 



DIAGNOSIS 6 3.8 mm, 9 3.9 mm. Dorsal integument, especially posteri- 

 orly, finely pustulose. Cephalon with three pairs of rounded dorsolateral 

 carinae, one middorsal carina, not reaching posterior margin. Pereonite 1 

 with two ventrolateral carinae. Pleopod 3, exopod biarticulate. Pleotelson 

 similar in 6 and 9 . Pleotelson with basal middorsal inflated area flanked by 

 two smaller lateral swellings, with carina in midline almost reaching pos- 

 terior margin; posterolateral margins converging to narrow, slightly concave 

 posterior margin. 6: Penes elongate, basally fused. Pleopod 2, copulatory 

 stylet basally broad, tapering distally, articulating mediodistally on endo- 

 pod; exopod with three enlarged distal plumose setae. 



RECORDS Venezuela, 5-7 m. 



REMARKS Several differences (in the male penial structure, copulatory 

 stylet, antennular peduncle, and pleonal sutures) between Cerceis carinata and 

 the definition of the genus (Harrison and Holdich, 1982; Harrison, 1984) 

 indicate that this species has not been placed in the correct genus. Until fresh 

 ovigerous females and mature males are available, the generic position must 

 remain uncertain. 



Discerceis Richardson, 1905 



DIAGNOSIS Mouthparts in 9 metamorphosed. Broodpouch formed by four 

 pairs of oostegites on pereonites 1-4, overlapping in midline. Brood held in 



