Comparative Analysis of the Dorsal Chaetotaxy ofTroglopedetesTrogolaphysaandCampylothoraxSupports the Synonymization of Tribes Paronellini and Troglopedetini (Collembola: Paronellidae)

摘要

Genera in subfamily Paronellinae have been grouped into five tribes, in part based on chaetotaxy. Tribes Bromacanthini, Paronellini, and Troglopedetini are characterized by having rounded scales and reduced or no macrochaetae, and although Bromacanthini harbors two well-differentiated genera, the core genera in tribes Paronellini and Troglopedetini form a homogeneous group where even generic diagnoses were, until recently, unclear. The genera assigned to Troglopedetini ( Troglopedetes Absolon, Trogolaphysa Mills, and Cyphoderopsis Carpenter) harbor many species with reduced eyes number, whereas the tribe Paronellini (genera Paronella Schött, Dicranocentruga Wray and Campylothorax Schött) includes species with 6–8 eyes. Recent analyses of the chaetotaxy of Trogolaphysa and Cyphoderopsissuggest that these genera represent specialized forms related to species in Paronellini. The taxonomy ofTroglopedetes, the type genus of Troglopedetini, is based almost exclusively on claw and mucro shape and dorsal macrochaetae pattern, and few details of the complete dorsal chaetotaxy of the species are known. This contribution presents a comparative analysis of the complete dorsal chaetotaxy of two species ofTroglopedetesfrom Spain (one new to science), two new species ofTrogolaphysafrom the Dominican Republic and Martinique, andCampylothorax sabanuswith the purpose of identifying aspects of the chaetotaxy that could provide diagnostic characters for the separation ofTrogolaphysaandTroglopedetes, and a new diagnosis for tribe Troglopedetini. The analysis shows that neither the number of chaetae nor its organization or pattern of macrochaeta provides diagnostic differences betweenTrogolaphysaandTroglopedetes. It is also concluded that the separation of Paronellini and Troglopedetini is not justified. Troglopedetini is here synonymized with Paronellini, and a new diagnosis of Paronellini is provided.