82 ASELLOTA • JANIRIDAE 



consisting of single free pleonite (often very narrow, short and in- 

 conspicuous) plus pleotelson. Uropods with well-developed sympod; usually 

 biramous. 



Carpias Richardson, 1902 



DIAGNOSIS Cephalon with dorsolateral eyes, lacking rostrum. Coxae visible 

 dorsally on pereonites 1-7. Pleon with one short pleonite lacking free lateral 

 margins, plus broad pleotelson. Antennules and antennae well developed, 

 latter with scale. Articles 2 and 3 of maxillipedal palp expanded. Pereopod 1 

 sexually dimorphic, often relatively enormous and/or elongate in male, car- 

 pochelate, carpus expanded, propodus variously armed or expanded, dac- 



Key to species of Carpias (based on pereopod 1 of mature 6 ) 



1 . Propodus distally acute 2 



Propodus distally broad 4 



2. Propodus apically acute, with proximal tooth minutus 



Propodus lacking teeth 3 



3. Carpus with two strong distal teeth; propodus (when chela closed) 



reaching to merus algicola 



Carpus with two strong and one small teeth; propodus (when chela 

 closed) reaching proximal half of carpus serricaudus 



4. Propodus with distinct teeth 5 



Propodus lacking distinct teeth 6 



5. Carpus distally with broadly rounded area; merus elongate-slender, 



length about four times greater than width bermudensis 



Carpus lacking broadly rounded area; merus short, broader than long 

 punctatus 



6. Carpus with two distal teeth; dactylus minute triton 



Carpus with three distal teeth; dactylus small, but not obsolete 7 



7. Propodus distally truncate; carpus with middle tooth of palm distally 



faintly bilobed brachydactylus 



Propodus distally faintly bilobed; carpus with middle tooth of palm 

 distally narrowly rounded harrietae 



