Download PDF as one large file - AToL Decapoda

Genus Microphrys H. Milne Edwards, 1851
Key to species
| Adapted from Williams, 19841
Family Majidae 501
Carapace with 2 lateral laminiform processes, 2 strong branchial spines
..... M. antillensis
Carapace without lateral laminiform processes, 1 strong branchial spine
.. M. bicornutus
Genus Mithrax Desmarest, 1823
Key to species
[Adapted from Rathbun, 1925]
1. Carapace without smooth, oblique, branchial sulci 2
Carapace with smooth, oblique, branchial sulci; rostral horns very short; minor
teeth of orbit tuberculiform, inconspicuous 14
2. (1) Palm armed above with spines or spinules 3
Palm not armed above with spines or spinules 7
3. (2) Two spines only on basal segment of antenna. M. spinosissimus
Three spines on basal segment of antenna 4
4. (3) Carapace paved with flattened granules, concealed by short hair
M. verrucosus, young
Carapace not paved with flattened granules 5
5. (4) Carapace as wide between tips of third anterolateral spines as between tips of fourth
spines; carapace closely granulate and tuberculate and densely pilose .. M. pilosus
Carapace widest between tips of fourth anterolateral spines (not counting orbital
spine) . 6
6. (5) Three or four supraorbital spines, exclusive of preorbital and exorbital spines;
propodi of legs very long and slender M. cornutus
Two supraorbital spines only, exclusive of preorbital and exorbital spines; propodi
of legs moderate (size small) M. acuticornis (over 18 mm long)