no. 3641 STOMATOPOD CRUSTACEA — MANNING 7 



Carapace strongly narrowed anteriorly, lateral margin concave, 

 completely lacking median and intermediate carinae; posterior fourth 

 of carapace usually with reflected marginal carinae only, traces of 

 lateral carinae present or absent; posterior margin straight; antero- 

 lateral margins slope posterolaterally to strong anterolateral spines, 

 which do not extend to base of rostral plate. 



Raptorial claw stout; dactylus -with 5 teeth, outer margin of dactylus 

 flattened; dorsal ridge of carpus with single, low, blunt spine. 



Mandibular palp and 4 epipods present. 



Exposed thoracic somites without submedian carinae, last 3 somites 

 with well-formed, unarmed intermediate carinae; lateral process of 

 fifth somite a short sharp spine, directed laterally; fifth somite with 

 blunt, tubercular, triangular or spiniform ventral projection on each 

 side; lateral processes of next two somites not bilobed, rounded antero- 

 lateral^ and posterolaterally, process of sixth somite more triangular 

 than that of seventh; ventral keel of eighth somite a low, inconspicuous 

 projection. 



Abdomen broad, depressed, lacking submedian carinae on first 5 

 somites; abdominal carinae spined as follows: submedian, 6; inter- 

 mediate, 5-6; lateral, (4) 5-6; marginal, (4) 5; sixth somite with sharp 

 spine on each side in front of articulation of uropod. 



Telson broader than long, with 3 pairs of sharp marginal teeth, 

 submedians with movable apices; prelateral lobes formed dorsally, not 

 noticeably projecting laterally; carinae of marginal teeth short, tuber- 

 culate dorsally; dorsal surface with short, U-shaped carinae, open 

 posteriorly, at anterior end of line of 4 tubercles converging under 

 posterior apex of median carina; 4 rows of tuberculate carinae present 

 between submedian and intermediate teeth, outer row anterior to 

 carina of intermediate tooth; single denticle present on surface anterior 

 to outer row, at level of U-shaped carina; small spined tubercle present 

 under spine of median carina; denticles sharp, spiniform, 3, 6-7, 1; 

 ventral surface of telson with low postanal keel. 



Outer margin of proximal segment of uropodal exopod with 7 

 slender, movable spines, last extending to midlength of distal seg- 

 ment; proximal segment of uropodal exopod with long dorsal carina; 

 endopod slender, tapered, curved ; basal prolongation with 6-8 slender 

 spines on inner margin and broad, rounded lobe on outer margin of 

 longer inner spine. 



Color. — Carapace with 2 broad bands of dark pigment, gastric 

 grooves dark; dorsal surface of merus dark; posterior margin of cara- 

 pace, last 3 thoracic, and all abdominal somites dark; last 3 thoracic 

 somites with some dark pigment on lateral processes; last 3 thoracic 

 and first 5 abdominal somites with dorsal rectangular dark patch; 

 pattern on telson faded, but with median triangle, apex at apical spine 



