RÉSUMÉ
RESUMEN Los cangrejos de montaña (Decapoda: Pseudothelphusidae) son considerados sensibles a diversas alteraciones antropogénicas y ambientales en los ecosistemas acuáticos. En quebradas de la región andina colombiana, que drenan varios agroecosistemas, existe poca información sobre estos organismos. Aquí se muestran los resultados de la abundancia de Hypolobocera bouvieri, en tres microcuencas altoandinas de Colombia y su relación con variables fisicoquímicas, en Villamaría, región suroccidental del departamento de Caldas. Se revisó el material depositado en la Colección Entomológica del Programa de Biología de la Universidad de Caldas (Manizales, Colombia). El oxígeno disuelto, sólidos suspendidos totales y concentración de hierro se correlacionaron negativamente con la abundancia de H. bouvieri, mientras que el tipo de sustrato mostró una correlación positiva. Nuestros resultados contribuyen al conocimiento de los cangrejos de agua dulce en quebradas altoandinas con alta actividad agrícola (cultivo de hortalizas) y aporta nueva información sobre la ecología de esta especie.
ABSTRACT Mountain crabs (Decapoda: Pseudothelphusidae) are considered sensitive to various anthropogenic and environmental alterations in aquatic ecosystems. In streams of the Colombian Andean region, which drain various agroecosystems, there is little information on these organisms. Here we show the results of the abundance of Hypolobocera bouvieri, in three high Andean microcatchments of Colombia and its relationship with physicochemical variables, in Villamaría, southwestern region of the department of Caldas. The material deposited in the Entomological Collection of the Biology Program of the University of Caldas (Manizales, Colombia) was reviewed. Dissolved oxygen, total suspended solids and iron concentration were negatively correlated with the abundance of H. bouvieri, while the type of substrate showed a positive correlation. Our results contribute to the knowledge of freshwater crabs in high Andean streams with high agricultural activity (vegetable cultivation) and provide new information on the ecology of this species.
RÉSUMÉ
ABSTRACT The male and female imago stage and a new species of the Hermanella complex are described based on material from Pará State, Northern Brazil: Hydromastodon cf. mikei (Thomas & Boutonnet, 2004) and Paramaka froehlichi sp. nov. The male imago of Hydromastodon cf. mikei can be distinguished from Hydromastodon sallesi by the following combination of characters: (1) body color pattern, especially abdominal terga translucent white with terga I to IV washed with black on posterior margin; (2) compound eyes anteriorly rounded; (3) medial projection of the styliger plate short; and (4) penis lobes close to each other and with posterolateral projection as long as ½ of its length. The male imago of Paramaka froehlichi sp.nov. can be distinguished the from the other species of the genus by the following combination of characters: (1) fore and hind wings with membrane brown; (2) legs uniformly yellowish-white, without distal band; (3) abdominal terga II to VI with marks more expanded laterally, median line absent; (4) medial projection of the styliger plate broad; (5) base of telopenis arising at distal ⅔ of penis lobe; and (6): body size of 6.1 to 7.6 mm.