Artículos de revistas
First larval description and chaetotaxic analysis of the neotropical whirligig beetle genus Enhydrus Laporte (Coleoptera, Gyrinidae)
Fecha
2016-09Registro en:
Michat, Mariano Cruz; Alvarenga, Thiago Marinho; Silva, Marconi Souza; Alarie, Yves; First larval description and chaetotaxic analysis of the neotropical whirligig beetle genus Enhydrus Laporte (Coleoptera, Gyrinidae); Sociedade Brasileira de Entomologia; Revista Brasileira de Entomologia; 60; 3; 9-2016; 231-237
0085-5626
1806-9665
CONICET Digital
CONICET
Autor
Michat, Mariano Cruz
Alvarenga, Thiago Marinho
Silva, Marconi Souza
Alarie, Yves
Resumen
The larva of the whirligig beetle Enhydrus sulcatus (Wiedemann, 1821) is described and illustrated for the first time, including detailed morphometric and chaetotaxic analyses of the cephalic capsule, head appendages and legs. Larvae of Enhydrus Laporte, 1834 exhibit the characters traditionally recognized as autapomorphies ofthe family Gyrinidae: well developed cardo, completely divided prementum, presence of lateral abdominal tracheal gills, and presence of four terminal hooks on the pygopod. The egg bursters located on the parietal, the presence of an additional sensorial plate on the third antennomere, and a well developed lacinia may also represent autapomorphies of the family. Enhydrus larvae share with those of the other known Dineutini genera the presence of numerous minute additional setae on the mandible, the presence of additional setae on the cardo, the submedial position of the coxal seta CO12, the absence ofthe trochanteral seta TR2, and the presence of numerous pore-like additional structures on the ultimate maxillary and labial palpomeres. On the other hand, Enhydrus can be distinguished from the other known dineutine genera by the presence of pore-like additional structures on the basal maxillary and labial palpomeres,the presence of ventral spinulae on the pygopod, and the bare tracheal gills, among other characters.