PEREZ FARFANTE: REVISION OF PENAEID SHRIMP GENUS PENAEOPSIS 



FIGURE 23— Penaeopsis rectacuta, holotype 9 24 mm cl, Bohol 

 Strait. Philippines. Thelycum, ventral view. Scale = 1 mm. 



ered with setae. Posterior thoracic ridge fringed 

 anteriorly with closely set setae. Median plate of 

 sternite XIII cordiform (with acute apex), covered 

 with setae except for central depression (occasion- 

 ally prolonged across entire width of plate); 

 posteromedian projection subrectangular or 

 subelliptical, with posterior margin entire or, 

 occasionally, shallowly emarginate. Sternite XII 

 bearing posteromedian, often laterally com- 

 pressed tooth of variable size, sometimes pro- 

 duced in apical spine; oblique pair of sharp ridges 

 extending posterolaterally from base of tooth. 



Thelycum in young females (9-11 mm cl) with 

 median plate of sternite XIII produced anteriorly 

 in long, slender spine, and posteromedian projec- 

 tion consisting of only minute knob; plate of ster- 

 nite XIV bearing short median ridge also produced 

 anteriorly in long, slender spine, latter indistinct 

 in females 13 mm cl. 



The female holotype, 26 mm cl, is in poor condi- 

 tion, with many parts missing; however, except for 

 the rostrum, which is almost entirely lost, the 

 carapace is well preserved as are the antennular 

 peduncle, most of the abdomen, and the thelycum. 

 The following characters of the carapace may be 

 readily observed: the second rostral tooth is 

 situated opposite the orbital margin, while the 



Figure 24.— Penaeopsis rectacuta. A. ? 25.5 mm cl, offTagolo Point. Mindanao. Philippines. B. J 24 mm cl. Tabayas Bay vicinity of 

 Marinduque Island, Philippines. Thelyca, ventral view (setae omitted on the legs). Scale = 2 mm. 



745 



