Download PDF as one large file - AToL Decapoda

502 Family Majidae
7. (2) Rostral horns sharp or acute (rostral horns very short; only two anterolateral
spines) M. holderi
Rostral horns blunt, either subtruncate or tuberculiform 8
8. (7) Carapace paved with close-set granules or tubercles ,....., 9
Carapace not paved with close-set granules or tubercles. 10
9. (8) Carapace paved with convex tubercles, each granulate ......»•
. M. hemphilli, mature
Carapace paved with flat, tessellated granules (lateral margins of carapace spinous;
carpus of cheliped nearly smooth above, three tubercles on inner edge)
M. verrucosus
10. (8) Spine on, or just above, posterolateral margin of carapace. ,..,.,, 11
Tubercle, instead of spine, on, or just above, posterolateral margin of carapace.... 12
11. (10) Two parallel and nearly transverse rows of well marked tubercles and spines on
posterolateral region M. caribbaeus, small or medium size
One row of not more than two or three well marked tubercles and spines on
posterolateral region; prehensile edges of fingers of very old specimens entire; not
crenulated, in gape, except on tubercle ...'.. M. hispidus
12. (10) Carapace very wide, anterior, marginal, branchial lobe strikingly protuberant;
posterolateral slope of carapace smooth, behind row of two conical tubercles
leading obliquely inward from spine at lateral angle; rostral sinus V-shaped..........
.. M. tor tug ae
Carapace narrower, anterior, branchial protuberance not strikingly prominent;
. posterolateral slope of carapace rough, with few tubercles or granules 13
13. (12) Well marked, posterolateral tubercle present, outermost of transverse row of three,
this row having similar row in front of it; prehensile edges of fingers crenulated
along gape; rostral sinus U-shaped M. caribbaeus, la rge
Almost transverse row of two large tubercles leading inward from spine at lateral
angle; tubercles behind and immediately in front of it all very small or granules;
rostral sinus V-shaped in young, U-shaped in old Af. pleuracanthus
14. (1) Carapace longer than broad V M. cinctimanus
Carapace broader than long. 15
15. (14) Anterolateral margins cut into rounded lobes only. 16
Anterolateral margins cut into spines or angular lobes or spines and lobes 17