Download PDF as one large file - AToL Decapoda

412 Family Porcellanidae
Genus Megalobrachium Stimpson, 1858
Key to species
| Adapted from Gore and Abele, 1976]
Telson of abdomen with 5 plates (carapace, chelipeds, and walking legs tuberculate;
lateral margins rounded, dentate; frontal, postfrontal, and protogastric lobes,
viewed frontally, appearing low, rounded, indistinct, usually smooth, rarely
granular) .M. soriatum
Telson of abdomen with 7 plates (carapace and chelipeds thickly covered with
coarse hairs; chelipeds heavily and evenly granulate; protogastric regions, viewed
frontally, appearing distinct and clearly elevated above frontal and hepatic regions;
propodi of walking legs more slender, from 2.8 to 3 times longer than wide)
M. poeyi
Genus Pachycheles Stimpson, 1858
Key to species
[Adapted from Haig, 1956]
1. Chelipeds thickly covered with stiff bristles. P. pilosus
No stiff bristles on chelipeds 2
2. (1) Chelipeds smooth except for rugosity on outer margin of carpus P. riisei
Chelipeds rough over entire surface 3
3. (2) Chelipeds with high longitudinal ridges; in between ridges rows of deep pits
present P. rugiman us
Chelipeds with longitudinal rows of large flattened tubercles 4
4. (3) Fingers of chelipeds neither gaping nor full of pubescence; space between tubercles
of chelipeds glabrous or nearly so; tubercles low, rows irregular ...P. ackleianus
Fingers of major cheliped gaping and full of pubescence; space between tubercles
filled with pubescence; tubercles heavy, in regular rows P. monilifer