Aegla sanlorenzo 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 : 26

Aegla sanlorenzo Schmitt, 1942

Diagnosis. Anterolateral spine of carapace reaching distal part of cornea; protogastric lobes raised; rostrum long, acuminate, deflected; rostrum carinate along its entire length; anterior angle of ventral margin of epimera 2 with acute spine; 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 only two, robust spines; ventral margin of merus of second pereiopod with distal spines followed by tubercles ( Bond-Buckup & Buckup 1994).

Measurements. The specimens examined showed a mean CL of 19.21 mm (n = 9 males); 17.22 mm (n = 7 females). Rostrum long. PCW/FW ratio ranging from 1.60 to 1.92, with a mean of 1.78 for males and 1.81 for females; i.e., a wide front. AL/AW ratio ranging from 1.49 to 1.89, mean 1.67 for males and 1.54 for females; i.e., areola quadrate to subquadrate.

New records. ARGENTINA: Province of Salta: watercourse Los Berros, with bridge Ruta 34, near to Calikuala. 23º 44'51"S, 64º 39'57"W; 392 m, 06.xii.2001 (UFRGS 3212, 3M, 2F); Province of Salta: Canal with Ruta 50, direction to San Ramon de La Nueva Oran, locality of Hipolito Irigoyen. 23º14'28"S, 64º16'29"W; 321m, 06xii.2001 (UFRGS 3214, 2 M, 2 F., 2 J).

Former distribution. ARGENTINA: Province of Jujuy, San Lorenzo River ( Bond-Buckup and Buckup 1994).

Present distribution. ARGENTINA: Parana River - Bermejo River system in the provinces of Salta and Jujuy.

Remarks. Bond-Buckup and Buckup (1994) raised doubts as to the status of A. sanlorenzo , considering that only the type was known. It is deposited in the Museo Argentino de Ciencias Naturales “Bernardino Rivadavia in Buenos Aires (MACN 7099).

The region of the type-locality has a very dry climate with a large moisture deficit, which was confirmed in the course of sampling at that location (23º43'56"S, 64º44'33"W; 478 m altitude). No specimens of A. sanlorenzo were found, because of the small amount of water in the river. However, the species was found in the Province of Salta, a new locality record. At Arroyo Los Berros in Jujuy Province, the river was flowing slowly, with its rocky banks silted over with extensive deposits of mud, in which the specimens were buried.