PEREZ FARFANTE: REVISION OF GENUS PSEUDARISTEUS 



Figure 7 .—Pseudaristeus kathleenae, holotype o", 23.5 mm CL, Teluk Bone, Sulawesi, Indonesia. A, Petasma, dorsolateral view of 

 left half. B, Ventral view. C, Right appendices masculina and interna, and basal sclerite of endopod, dorsal view. D, Ventral view. 

 Scales = 1 mm. 



distoventrally along mesial margin. Dorsolateral 

 lobule sclerotized, expanding distolaterally before 

 tapering to subangulate mesial apex, its distolateral 

 margin strongly curved; ventral surface, exhibiting 

 arched slender rib, lacking setae. Ventral costa gent- 

 ly sinuous, only slightly inclined distomesially, its 

 terminal part forming truncate blade lying free but 

 against ventral surface of dorsolateral lobule. 



Appendix masculina (Fig. 7C, D ) roughly obovate, 

 with proximal part curving ventrally embracing ap- 

 pendix interna; its distal margin bearing long setae 

 and mesial margin bearing short, more numerous 

 ones. Appendix interna roughly triangular and sub- 

 equal in length to appendix masculina. 



In males, sternite XIV with setose anteromedian 

 tubercle; plate of sternite XIII elongate (length 2-3 

 times basal width), broadly rounded anteriorly and 

 produced in minute apical spine bearing tuft of long 

 setae. 



Thelycum (Fig. 8) with setose, moderately long 

 plate of sternite XIV either traversed by shallow 

 groove posteriorly or broadly depressed, and with 

 anteromedian margin varying from distinctly con- 

 cave to slightly convex, plate produced at either side 

 in short anterolateral hood; fossa immediately ante- 

 rior to plate very conspicuous and bearing pair of 

 small oblique ridges. Median plate of sternite XIII, 



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Figure 8.—Pseudaristeus kathleenae, 9 47 mm CL, Lagonoy Gulf, 

 east of southern Luzon, Philippines. Thelycum. Scale = 2 mm. 



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