Cassidinidea 207 



RECORDS Brazilian coast from Rio de Janeiro northward, 1.5 m; Costa 

 Rica, Panama; shallow infratidal below sandy beaches. 



REMARKS Glynn and Glynn (1974) discussed color polymorphism in this 

 species. 



Subfamily Cassidininae Iverson, 1982 



DIAGNOSIS Cephalon not medially fused with pereonite 1. Pereopod 1 am- 

 bulatory. Pleopods 4 and 5, both rami lacking transverse pleats, outer rami 

 unsegmented. Pleopod 5, outer ramus with low subapical squamiferous pro- 

 tuberances. Pleotelsonic apex entire. Uropods with exopods reduced. 



REMARKS The genus Dies has twice been recorded from the Caribbean: D. 

 arndti Ortiz and Lalana, 1980, from Cuba, and D. barnardi Carvacho, 1977, 

 from Guadeloupe. This genus is distinguished from Cassidinidea solely on the 

 basis of the penial structure: biramous in Cassidinidea, uniramous in Dies. 

 Harrison (1984) has pointed out that the separation of these two genera has 

 not been satisfactorily resolved. The penis of neither the Cuban nor the 

 Guadeloupan species has been illustrated, but the whole-animal illustrations 

 of both look suspiciously like Cassidinidea ovalis. Examination of material of Z). 

 barnardi from the Paris Museum supports the view that this species was based 

 on immature material of C. ovalis. Neither of the so-called species of Dies are 

 dealt with in this work, both being regarded as junior synonyms of C ovalis. 



Key to genera of Cassidininae 



Frontal lamina visible dorsally between antennular bases; two basal 

 articles of antennular peduncle not expanded Cassinidinea 



Frontal lamina not visible between antennular bases; two basal articles 

 of antennular peduncle broadly expanded Paraleptosphaeroma 



Cassidinidea Hansen, 1905b 



DIAGNOSIS Body strongly dorsoventrally depressed. Eyes dorsal, situated 

 at posterolateral corners of cephalon. Latter somewhat sunken into pereonite 

 1 . Frontal lamina expanded, visible dorsally between antennular bases. An- 

 tenna directed laterally. Pleon consisting of one free pleonite having short 

 free lateral margin, plus broadly triangular pleotelson. Uropodal endopod 



