PEREZ FARFANTE: REVISION OF PENAEID SHRIMP GENUS PENAEOPSIS 



Figure 20. — Penaeopsis rectacuta. 9 27 mm cl, Albay Gulf, Luzon, Philippines. Cephalothorax, lateral view. Scale = 5 mm. 



FIGURE21. — Penaeopsis rectacuta. A, 6 25mmd,Balayan Bay, 

 Luzon, Philippines, nght flagella (mesial viewl.B, i 27 mm cl, 

 Albay Gulf, Luzon, Philippines, anteroventral part of carapace. 

 C, V 28.5mmcl,GulfofDavao,Mindanao,tel8onandlefturopo<i, 

 lateral view. D, Same specimen, tip of telson, dorsal view. Scales: 

 A.B.D = 2 mm; C = 5 mm. 



tending posterodorsally to rather near margin of 

 carapace. 



Antennular peduncle with length equivalent to 

 about 0.75 that of carapace, third article slightly 

 stouter and longer in male than in female, about 

 1.65 times as long as second in former and 1.40 

 times in latter; prosau-tema almost attaining distal 

 margin of first article; distolateral spine slender, 

 sharp, and reaching between proximal 0.3 and, at 

 least, midlength of second article; stylocerite end- 

 ing in small spine, length about 0.4 that of first 

 article. In both sexes dorsal flagellum not evenly 

 tapering, its stout proximal part suddenly nar- 

 rowing into filiform distal part; but in male, dorsal 

 flagellum longer than ventral, its length about 1.7 

 that of carapace, whereas in female, dorsal flagel- 

 lum shorter than ventral, about as long as cara- 

 pace. Ventral flagellum in male (Figure 2LA ) with 

 strong knob at junction between semicircular 

 ppoximal part and straight distal part; in female, 

 ventral flagellum straight, tapering to filiform 

 distal part. (Shape of both flagella in male and 

 female characteristic of all species of genus.) 



Scaphocerite falling short of to surpassing distal 

 end of antennular peduncle, reaching at most as 

 far as base of distal fourth of thickening of dorsal 

 flagellum; lateral rib ending in slender spine, not 

 quite reaching distal margin of lamella. Antennal 

 flagellum broken in shrimp examined. 



Third maxilliped extending at least to basal 0.2 

 of second antennular article and at most to mid- 

 length of third; ratio of dactyl/propodus about 0.65 

 in males and 0.70 in females. 



First pereopod exceeding carpocerite by tip of 

 dactyl or by as much as length of propodus. Second 

 pereopod surpassing carpocerite at least by length 

 of propodus and at most by propodus and 0.3 

 length of carpus (i.e., reaching between base of 



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