Download PDF as one large file - AToL Decapoda

Family Raninidae
Key to genera and species
| Based on Rathbun, 1937, and Williams, 1984]
Family Raninidae 455
1. Fronto-orbital border more than half width of carapace 2
Fronto-orbital border less than half width of carapace 3
2. (1) Orbits of moderate size, slightly oblique and situated on anterior border of carapace,
ocular peduncle folded almost transversely or longitudinally; last pair of pereopods
slender Raninoides
Orbits large, deep cavities in lower side of carapace forming inverted V with point
at rostrum, ocular peduncles folded strongly and obliquely downward and
backward; last pair of pereopods not slender Ranilia
3. (1) Carapace smooth; chelae broad and flat... Lyreidus nitidus
Carapace eroded; chelae elongate, manus swollen, fingers long and slender
Symethis variolosa
Genus Ranilia H. Milne Edwards, 1837
Key to species
[Adapted from Williams, 1984]
Hand of cheliped with spine on upper margin R. muricata
Hand of cheliped without spine on upper margin R. constricta
Genus Raninoides H. Milne Edwards, 1837
Key to species
[Based on Rathbun, 1937]
Spine at distal end of merus of cheliped; four spines on lower margin of manus
R. loevis
No spine at distal end of merus of cheliped; five or six spines on lower margin of
manus R. louisianensis