Three new species of Baetodes Needham & Murphy are described based on nymphs collected in the Nariño department, in the southern region of Colombia. The main morphological characteristics that can be used to distinguish them from other species of genus are presented. Baetodes awa sp. nov.: labrum with subapical row of six setae of subequal length, glossa with two pectinate bladelike setae of the same length, abdominal tubercles present but very small; Baetodes diasae sp. nov. : labrum with subapical row of 3+13 setae of subequal length, glossa with two pectinate bladelike setae, one gill on each coxa with a small basal projection. Baetodes pseudospinae sp. nov. : glossa with one pectinate bladelike seta, two tubercles on pronotum and mesonotum, prominent tubercle on metanotum, larger than that of first abdominal segment. Besides the descriptions of the new species a key for the identification of the Colombian species of Baetodes is presented for the first time
Abstract:In this paper the first record of Hydrosmilodon primanus (Eaton, 1892) from South America is presented. The record of the species is based on nymphs collected in San Sebastián de Mariquita city, Tolima department, Colombia.
Baetidae es una de las familias de insectos más abundantes y diversas del orden Ephemeroptera. En Colombia se registran 38 especies en 19 géneros, de las cuales cinco especies se localizan en la cuenca del Río La Vieja: Andesiops peruvianus, Camelobaetidius edmunsi, Mayobaetis ellenae, Nanomis galera y Prebaetodes sitesi. En este trabajo, se examinaron un total de 7226 ninfas de baetidos, colectadas en el Río La Vieja, pertenecientes a 23 especies en 11 géneros. Se encontró que el género más abundante y con mayor riqueza es Baetodes seguido por Camelobaetidius (10 individuos y tres especies determinadas respectivamente), las especies más abundantes fueron Baetodes awa y Camelobaetidius edmunsi (con 3563 y 1282 individuos respectivamente). En el presente trabajo se registra por primera vez, para el Río La Vieja, dos géneros (Cloeodes y Varipes) y ocho especies (Baetodes awa, Baetodes diasae, Baetodes pseudospinae, Camelobaetidius mathuriae, Camelobaetidius patricki, Nanomis rasmusseni, Prebaetodes meridinensis y Zelusia principales). Lo anterior establece que el rio La Vieja registra alrededor del 61 % de las especies de baetidos reconocidas para Colombia (23 de las 38 especies).
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