Revision of some springtail taxa of the subfamily Pseudachorutinae (Collembola: Neanuridae) endemic to Patagonia

Abstract

A revision of 3 endemic genera and their type species from the Patagonian subregion is presented. Cassagnaurida dentata (Cassagnau et Rapoport, 1962) and Delamarellina globulosa Cassagnau et Rapoport, 1962 are redescribed. A complement to the description of Notachorudina patagonica Cassagnau et Rapoport, 1962 is done with specimens from several localities from Chile. D. guilleni Rapoport et Rubio, 1963 is considered a synonym of D. globulosa and N. rapoporti Queiroz et Zeppellini (2017) of N. patagonica. A comparison of labial chaetotaxy, antenna, and furcula is made to find morphological patterns in these Pseudachorutinae. Some morphological characteristics of adults and juveniles of the 3 taxa are illustrated. Ontogenetic development is analyzed and intraspecific variation is studied.