PEREZ FARFANTE REVISION OF PENAEID SHRIMP GENUS PENAEOPSIS 



Figure 31. — Penaeopsis serrata, V 29.5 mm cl, Dry Tortugas 

 Islemds, Fla. A, Anteroventral part of carapace. B, Telson and 

 left uropod. C. Tip of telson. Scales: A,C = 2 mm; B = 5 mm. 



attaining distal end of antennular peduncle or 

 overreaching it by as much as length of propodus. 

 Fourth pereopod surpassing carpocerite by tip of 

 dactyl or by maximum of dactyl plus about one- 

 half length of propodus. Fifth pereopod extending 

 at least to midlength of second antennular article 

 and at most to distal end of third. Order of 

 pereopods in terms of their maximum anterior 

 extensions: first, fourth, second, fifth, and third; 

 fourth pereopod extending almost as far as second. 

 Third maxilliped reaching about as far as fifth 

 pereopod. 



Abdomen with sixth somite elongate, about 1.8 

 times maximum height, bearing faint, inter- 

 rupted cicatrix on lateral surface. Telson (Figure 

 3LS ) with lateral margins armed with two (rarely 

 three) pairs of short, slender movable spines; fixed 

 spines moderately long, extending at most as far 

 as base of distal third of terminal portion; terminal 

 portion (Figure 31C) with length 6-9 times basal 

 width, spear shaped and with dorsal surface con- 

 vex. Mesial ramus of uropod almost reaching or 

 surpassing apex of telson by as much as 0.15 of its 

 own length; lateral ramus overreaching mesial 

 ramus by 0.25-0.30 of its own length. 



Petasma (Figure 32A, B) with dorsomedian 

 lobule produced in well-defined distomedian pro- 

 jection, bearing narrow distal plate and broader 

 proximal plate thickened mesially, but not form- 





Figure 32.— Penaeopsis serrata, 6 22 mm cl. Golfo de los Mosquitos, Panama. A, Petasma, dorsal view. B, Ventral view. C, Right 

 appendix masculina, dorsal view. D. Mesial view. Scales = 1 mm. 



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