Download PDF as one large file - AToL Decapoda

Family Leucosiidae
Key to genera and species
| Adapted from Rathbun, 1937]
Family Lcucosiidue 479
1. Merus of outer (third) maxilliped half or more than half length of ischium measured
along inner border; fingers stout, gradually narrowing from base to tip 2
Merus of outer maxilliped less than half length of ischium measured along inner
border; fingers slender, of subequal width throughout 7
2. (1) Pterygostomian margin terminating anteriorly in circular depression behind orbit;
surface of carapace uneven; chelipeds of moderate length 3
Pterygostomian margin not terminating in circular depression and often obscure;
carapace almost hemispherical, surface only slightly uneven; chelipeds often
elongate . 6
3. (2) Carapace broadly elliptical, sides expanded Uhlias limbatus
Carapace narrower, pentagonal to octagonal, surface very uneven 4
4. (3) Peep hollows or caves within posterior half of carapace. Speloeophorus
No deep hollows or caves within posterior half of carapace 5
5. (4) Upper surface of carapace deeply excavate Lithadia
Upper surface of carapace uneven but not deeply excavate Ebalia
6. (2) Chelipeds rather massive; abdominal segments 3-5 fused in male Persephona
Chelipeds long and slender; abdominal segments 3-6 fused in male; cardiac and
intestinal regions indicated Myropsis quinquespinosa
7. (1) Posterior half of carapace with seven spines; anterior half of carapace with three
spines on each side Callidactylus asper
Posterior half of carapace with three spines; anterior half of carapace with no spines
or with one spine on each side Iliacantha