DECAPOD CRUSTACEANS OF THE WEST INDIES 



149 



52. Pseudothelphusa (Pseudothelphusa) americana De Saussure 



Figures 42, 43e 



Pseudo-ThelpMisa americana De Saussure, 1857b, p. 305 [type-locality; Haiti]. 



Potamia americana. — De Saussure, 1858, p. 436, pi. 2: fig. 12. 



Pseudothelphusa Americana. — Smith, 1870, p. 146. 



Pseudotelphusa americana. — Pocock, 1889, p. 10. 



Pseudothelphusa dugesi Rathbun, 1893, p. 651, pi. 74: figs. 4, 5 [type-locality: 

 Cuernavaca, Estado de Morelos, Mexico]. 



Potamocarcinus americanus. — Ortmann, 1897, p. 317. 



Potamocarcinus dugesi. — Ortmann, 1897, p. 318. 



Pseudothelphusa americana. — Rathbun, 1898, pp. 533, 537; 1905, p. 283. 



Pseudothelphusa {Pseudothelphusa) americana. — Pretzmann, 1965, p. 4 [by impli- 

 cation]. 



Diagnosis. — Carapace not very convex longitudinally or trans- 

 versely, between three-fifths and two-thirds as long as wide; cervical 

 groove distinct, concave anteriorly; anterolateral margui very ob- 

 scurely denticulate, with shallow notch near outer orbital angle; front 



Figure 42. — Pseudothelphusa (Pseudothelphusa) americana, based on male syntype of 

 P. dugesi (carapace length 20.0 mm) from Cuernavaca, Morelos State, Mexico (P. L. 

 Jouy). 



not delimited dorsally by transverse crest. Third maxilliped with 

 merus narrowing distally, distolateral margin convex; exopod rather 

 long, falling only slightly short of distal end of ischium. Pereiopods 

 slender but not unusually long. Chela without prominent, swollen 



