A. MilneEdwards, 1880 : 62
A. MilneEdwards & Bouvier, 1894 : 306
Henderson, 1888 : 174
Benedict, 1902 : 292
Dam, 1933 : 37
Chace, 1942 : 11
Pequegnat & Pequegnat, 1970 : 159
Melo, 1999 : 168
MeloFilho, 1999 : 383
Reports on the results of the N. Oc. “ Prof. W. Besnard ” expeditions to the southern coast of Brazil under the Revizee Program: Chirostylidae and Galatheidae (Crustacea: Decapoda: Anomura)
De, Gustavo A. S.
Melo-Filho
Zootaxa
2006
1238
1
22
04525211-e8de-46b3-8117-973d8b35cf9b
A. Milne-Edwards, 1880
A. Milne-Edwards
1880
[264,826,1681,1707]
Malacostraca
Chirostylidae
Uroptychus
Animalia
Decapoda
2
3
Arthropoda
species
nitidus
Diptychus nitidus A. MilneEdwards, 1880: 62; A. MilneEdwards & Bouvier, 1894: 306; 1897: 134, pl. 11, figs. 21–22; pl. 12, figs. 10–16. Uroptychus nitidus Henderson, 1888: 174, pl. 21, fig. 6; Benedict, 1902: 292; van Dam, 1933: 37, 41; Chace, 1942: 11, figs., 3–6; Pequegnat & Pequegnat, 1970: 159, figs. 5–15; Melo, 1999: 168, figs. 101–102; MeloFilho, 1999: 383, fig. 1.
Material examined Brazil: São Paulo — N.Oc. “Prof. W. Besnard”, st. 6679, 808 m, 2 ex. ( MZUSP13194), 1 ex. ( MZUSP13195). Paraná — N.Oc. “Prof. W. Besnard”, st. 6782, 480 m, 1 ex. ( MZUSP13214). Santa Catarina — N.Oc. “Prof. W. Besnard”, st. 6811, 506 m, 1 ex. ( MZUSP13201). Recognition characters (Variety B, of Chace, 1942: 15) Mediumsized form, carapace 6.6 mm to base of rostrum, 4.8 to 6.7 in ovigerous females. Carapace not very convex dorsally, a fairly deep transverse groove in lateral view; lateral margins more or less denticulate. Rostrum narrow, twice as long as eyes. Cornea slightly wider than eyestalk, medium brown in color. Chelipeds five or slightly more than five times as long as carapace without rostrum; chelipeds more slender in females than in males; merus smooth, devoid of denticles; carpus subcylindrical, with few denticles on lower surface and with a very obscure furrow on inner portion of upper surface; chela broad and flattened dorsoventrally; fingers shorter than palm, but never more than onefourth shorter; hiatus usually present in both sexes.
Distribution (Variety B) Western Atlantic: Gulf of Mexico(southeast), Cuba(north coast of eastern side) Brazil(Pernambuco, Espírito Santo, São Paulo, Paraná, Santa Catarina); between 450 and 808 meters depth.
Remarks The specimens examined agree almost entirely with the description of U. nitidusvariety B by Chace (1942). However, in the material examined, there is a darker stain, close to the posterior margin of the carapace.