PEREZ FARFANTE: SPERMATOPHORES OF AMERICAN WHITE SHRIMPS 



Figure 9.—Penaeus (Litopenaeus) stylirostris. A, Ventrolateral view of right spermatophore dissected from terminal ampulla.d'off 

 Juan Dfaz, Panamd. B, Dorsomesial view of same specimen. C, Dorsomesial view of right spermatophore forcefully expelled from 

 terminal ampulla, cToff Panamd Province, Panamd. (For the purpose of illustration the anterior ventromesially directed part of the 

 blade has been turned laterally and the viscous material removed.) Abbreviations as in Figure 1. 



anteriorly in a rounded portion affixed to the dor- 

 somesial wall. 



In this spermatophore, the dorsomesial wall 

 (Figure 9B, C) is turned upon itself and attached to 

 the mesial lapel of the ventral wall, but not joining 

 the lateral wall -except posteriorly, where they 

 become fused. Consequently, the lateral wall and 

 part of the ventral wall overlap the sac (largely 

 formed by the dorsomesial wall) as a protecting 

 shield. The sac is subconical anteriorly; it expands 

 in a conspicuous rounded bulge at the base of the 

 wing, and continues into the elongate posterior 

 portion affixed to the base of the flange and firmly 

 attached to the dorsal plate. 



The wing (Figure lOA, B) consists of a trans- 

 versely elongate, mostly sclerotized anterior 

 region, and a subrectangular, membranous 

 posterior region. The anterior region bears a long, 

 sharp, ventral ridge, joining a short, pointed, basal 

 rib at almost a 90° angle; the area laterally con- 

 tiguous to the basal rib is membranous, whereas 

 that mesial to it is thick, but soft, and meets the 

 ventral wall of the sac. Dorsally, the wing is 

 produced in a broad, rounded lobe, situated close to 

 its anteroproximal- margin. The membranous 

 region of the wing bears a posterior rib that ends 



Figure lO.-Penaeus {Litopenaeus) stylirostris. Wing severed 

 from geminate body of right spermatophore, cf off Playas, 

 Ecuador. A, Ventral view, posterior membranous region ex- 

 tended. B, Dorsal view of same specimen. 



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