Aegla scamosa Ringuelet, 1948

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: 26-27

publication ID 10.5281/zenodo.193342

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Aegla scamosa Ringuelet, 1948


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.


Universidade Federale do Rio Grande do Sul


Museo de La Plata