152 U.S. NATIONAL MUSEUM BULLETIN 2 92 



Family Trichodactylidae 

 Genus Trichodactylus 



54. Trichodactylus (Dilocarcinus) dentatus (Randall) 



Figures 44, 46a 



Orthostoma dentata Randall, 1840, p. 122 [type-locality: Paramaribo, Surinam 



(restricted by Holthuis, 1959)]. 

 Dilocarcinus muUidentatus Von Martens, 1869, p. 5, pi. 1: fig. 2 [type-locality: 



Salvador, Estado da Bahia, Brazil]. 

 Dilocarcinus dentatus. — Young, 1900, pp. 231, 234, pis. 5, 6. 

 Trichodactylus (Dilocarcinus) dentatus. — Rathbun, 1905, pi. 20 (XVIII): fig. 4; 



1906, p. 65.— Holthuis, 1959, p. 214, figs. 50b, 51. 

 Gerastus denticulatus (Kroyer ms) Rathbun, 1906, p. 65 [type-locality: Cayenne, 



French Guiana?]. 



Diagnosis. — Carapace subcircular, about five-sixths as long as 

 wide, strongly convex both longitudinally and transversely, without 

 transverse ridge across branchial regions; anterolateral margin armed 

 with 8-11 small, acute, subequal teeth; front bearing 15-19 small 



Figure 44. — Trichodactylus (Dilocarcinus) dentatus, male (carapace length 29.0 mm) from 

 near Apartaderos, Cojedes State, Venezuela (A. Fernandez Y. and C. Ciferri). 



spines. Abdomen with somites 4-6 fused in male, 3-6 in female. 

 Eyes with cornea as wide as stalk, not reduced. Third maxilliped 

 with merus distinctly longer than wide. Walking legs with dactyls 

 broadly lanceolate. First pleopod of male with extreme distal portion 

 tapering regularly to tip, provided with scattered small sharp spinules. 



