NO. 9 manning: Atlantic stomatopod Crustacea 13 



4. Lateral process of fifth thoracic somite, in dorsal view, made up 

 of two lobes, a rounded posterior one and an acute, forwardly 

 curved anterior one ; two rounded lobes present between the two 

 spines of basal prolongation of uropod 



[S. alba Bigelow, 1893 ; CuraQao, Schmitt, 1924] 

 Lateral process of fifth thoracic somite, in dorsal view, made 

 up of one lobe, usually acute and curved forward; at most one 

 rounded lobe between the two spines of basal prolongation of 

 uropod 5 



5. Eyestalks dilated, usually constricted proximad to cornea; epi- 



pods on first three thoracic limbs only 



. [5. dubia H. Milne-Edwards, 1837; Panama, Schmitt, 1940; 

 Venezuela, Rodriguez, 1959; Brazil, Lemos de Castro, 1955] 

 Eyestalks subtriangular, widest at cornea. More than three pairs 



of epipods present 6 



6. Epipods present on first four thoracic appendages only ; raptorial 

 claw armed with five teeth only ... [5. prasinolineata 

 Dana, 1852; Brazil, Lemos de Castro, 1955] 



Epipods present on first five thoracic appendages; raptorial claw 

 armed with five or six teeth, usually six 7 



7. Raptorial claw armed with five teeth; mandibular palp absent 



[S. neglecta Gibbes, 1850; Brazil, Lemos de Castro, 1955] 

 Raptorial claw armed with six teeth ; mandibular palp present 8 



8. Dorsal surface of telson with carinae in addition to carinae of 

 marginal spines ; posterior margin of fifth and sixth abdominal 

 somites with supplementary spinules .... 5. rugosa 

 Dorsal surface of telson with carinae of marginal spines only; 

 no supplementary spinules on posterior margin of fifth and 

 sixth abdominal somites 9 



9. Median carina of carapace bifurcated anterior to dorsal pit . . 10 

 No bifurcation of median carina of carapace anterior to dorsal 

 pit 11 



10. Outer margin of raptorial dactylus sinuate; lateral process of 

 fifth thoracic somite acute, curved forward; denticles 3-4, 6-9, 

 1 S. empusa 



WOODS 



hole:. 



MASS. 



