Description of a new species of Aeglidae, and new records of related species from river basins in Argentina (Crustacea, Anomura) Author Bond-Buckup, Georgina Author Jara, Carlos G. Author Buckup, Ludwig Author Bueno, Alessandra A. P. Author Pérez-Losada, Marcos Author Crandall, Keith A. text Zootaxa 2010 2343 18 30 journal article 10.5281/zenodo.193342 451e845a-bc93-48c8-9d67-121040a631a5 1175-5326 193342 Aegla scamosa Ringuelet, 1948 Diagnosis . Anterolateral spine of carapace reaching and sometimes exceeding base of cornea; protogastric lobes absent; transverse dorsal line sinuous; rostrum triangular, of medium length, carinate with indistinct scales on the distal third; front narrow; anterior angle of ventral margin of epimera 2 with two or more scales; fourth sternite slightly raised, medially, with scale; proximal outer margin of moveable finger of cheliped without lobe; palmar crest present, sub-rectangular, indented; inner margin of ventral face of ischium of cheliped only with five tubercles; dorsal and ventral margins of merus of second pereiopod with scale-shaped tubercles and scales. (Modified from Bond-Buckup & Buckup 1994 ). Measurements . The specimens examined showed a mean CL of 24.04 mm (n = 8 males ; 1 female ). Species with rostrum of medium length, which modified the species diagnosis of Bond-Buckup & Buckup ( 1994 ) . PCW/FW ratio ranging from 1.90 to 2.12 , mean 1.97 ; i.e., a narrow front. AL/AW ratio ranging from 1.52 to 1.85 , mean 1.61 ; areola subquadrate. New records . ARGENTINA : Province of Mendoza: Rio Mendoza, with Ruta 7 , near to 10 km of Upslatta. 32 º 41 ' 24 "S , 69 º 21 ' 37 "W ; 1709 m , 01.xii. 2001 ( UFRGS 3217, 4M, 2 F, 1 J); Frei L. Beltran, Finca Gune, Mendoza, 27 .ii. 1942 ( MLP 0 0 86, 1M, 2 F); Province of San Juan: watercourse of Água Negra, tributary of River Jachal, with Ruta 40 , at 7 km of San Juan, San Juan Jachal. 30 º 19 ' 59 "S , 68 º 42 ' 39 "W ; 1086 m , 02.xii. 2001 ( UFRGS 3215, 2M, 3 F, 6 J); idem, ibidem ( UFRGS 3216, 1M, 4 F); River Jachal, near to Ruta 150 , with S.J. Jachal and Rodeo. 30 º 12 ' 52 "S , 69 º02' 14 "W ; 1476 m , 02.xii. 2001 ( UFRGS 3223, 3M, 2 F). Former distribution . ARGENTINA : Southern San Juan Province, northwestern Mendoza Province ( Bond-Buckup & Buckup 1994 ). Present distribution . ARGENTINA : Colorado River system in the provinces of San Juan and Mendoza. Remarks. The localities in San Juan Province are new records, and enlarge the geographical distribution of this species.