Aegla jujuyana Schmitt, 1942

Bond-Buckup, Georgina, Jara, Carlos G., Buckup, Ludwig, Bueno, Alessandra A. P., Pérez-Losada, Marcos & Crandall, Keith A., 2010, Description of a new species of Aeglidae, and new records of related species from river basins in Argentina (Crustacea, Anomura), Zootaxa 2343, pp. 18-30 : 23-24

Aegla jujuyana Schmitt, 1942

Diagnosis. Anterolateral spine of carapace exceeding half of cornea; protogastric lobes obsolete; rostrum short, narrow, deflected; rostrum carinate along its entire length; front narrow; proximal outer margin of moveable finger of cheliped without lobe; fingers of cheliped without lobular tooth; palmar crest of cheliped absent; inner margin of ventral face of ischium of cheliped with tubercles; areola rectangular. (Modified from Bond-Buckup & Buckup 1994.)

Measurements. Mean length of cephalothorax: 23.13 mm CL (n = 4 males). The PCW/FW ratio confirms the narrow front and the rectangular areola as characterized by Bond-Buckup & Buckup (1994). Examination of new specimens and new comparative analyses, relating the length of the rostrum to the length of the cephalothorax from the orbit, characterized the rostrum of A. jujuyana as short. Therefore, this character modifies the species diagnosis given by Bond-Buckup & Buckup (1994).

New records. ARGENTINA: Province de Jujuy: catchment near Escuela Agrotecnica, locality of Humahuaca . 23º11'50"S, 65º20'25"W; 2998 m, 05.xii.2001 (UFRGS 3206, 3M, 2F); Lagon at North of Tilcara, side to Rio Grande, Tilcara. 23º33'50"S, 65º23'05"W; 2503 m, 05.xii.2001 (UFRGS 3211, 11M, 4F, 4J).

Former Distribution. ARGENTINA: Provinces of Jujuy and northeastern Salta ( Bond-Buckup & Buckup, 1994).

Present distribution. ARGENTINA: Paraná River system, Grande River, Provinces of Jujuy and northeastern Salta.

Remarks. The site where the specimens were found, a reservoir in Humahuaca , with a silty bottom and input of oxygen through upwelling from the subsoil, was unprecedented, because the species has until now been recorded in fast-flowing rivers.