Aegla uruguayana 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 : 28

Aegla uruguayana Schmitt, 1942

Diagnosis. Anterolateral spine of carapace exceeding half of cornea; rostrum long, tending toward styliform, carinate along its entire length; anterior angle of ventral margin of epimera 2 projecting as a spine; fourth thoracic sternite raised, with a spine; proximal outer margin of moveable finger of cheliped without lobe; fingers of cheliped with lobular tooth; palmar crest of cheliped absent; inner margin of palm broadly carinated, armed anteriorly with a sharp spine; inner margin of ventral face of ischium of cheliped with one distal robust spine and up to three elevations along the segment; dorsal margin of merus of second pereiopod with a distal spine and scale-shaped tubercles; ventral margin of merus of second pereiopod with scales (Modified from Bond-Buckup & Buckup 1994).

New records. ARGENTINA: Province of Buenos Aires: River Areco, basin River La Plata, Carmen de Areco. 34º24'46.8"S, 59º57'41.7"W; 44 m, 21.x.2003 (UFRGS 3655, 5M, 1F); Tributary of River Dulce, bridge with Ruta 191, Basin River La Plata, near Salto. 34º20'14.4"S, 60º16'55.5"W; 58 m, 21.x.2003 (UFRGS 3656, 13M, 9F); Arroyo Cepeda with Ruta in direction to Mariano Benitez, Basin of River La Plata. 33º41'47.2"S, 60º 31'55.9"W; 69 m, 21.x.2003 (UFRGS 3658, 3J, 7M, 12F); Arroyo Manantiales, Basin of River La Plata, loc. Pergamino, deviation Ruta 188, 33º50'8.9"S, 60º23'13.1"W; 61 m, 22.x.2003 (UFRGS 3662, 3M, 2 F, 8J); Arroyo Manantiales, basin River La Plata, loc. Guerico. 33º42'14" S, 60º20'31.1"W; 51 m, 22.x.2003 (UFRGS 3664, 4 F, 3J); River Areco, basin River La Plata basin, loc. San Antonio de Areco. 34º14'24.7"S, 59º 28'6.2"W; 24 m, 23.x.2003 (UFRGS 3667, 6M, 7F).; Cañada Honda with ruta 41, loc. San Antonio Areco, 34º04'17.8"S, 59º30'26"W; 21 m, 22.x.2003 (UFRGS 3668, 1 M, 1F, 5J).

Former distribution. ARGENTINA: Provinces of Mendoza, San Luis, Cordoba, Santa F, Entre Rios, and Buenos Aires. BRAZIL: southern part of Rio Grande do Sul. Uruguay: Departments of Salta, Paysand, Soriano, Colonia, Rocha, Maldonado, and Canelones ( Bond-Buckup & Buckup 1994).

Present distribution. ARGENTINA: Parana River delta, Uruguay River system; La Plata River system and Buenos Aires Province to Colorado River; Pampean System.

Southern BRAZIL, URUGUAY: Uruguay River basin.

Remarks. The occurrence of A. uruguayana in the tributaries of the right bank of the La Plata River corroborates the distribution of this species in northern Buenos Aires Province.

The broad geographical distribution of Aegla uruguayana has led to research on this species, particularly on aspects of its reproduction (see López-Greco et al. 2004; Perez-Losada et al. 2004; Viau et al. 2006).