6 - Sphaeromatidae::“Cute As Buttons”

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 8)
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