The first Neotropical Capbrya Barra, 1999 (Collembola: Orchesellidae: Nothobryinae) and the reinterpretation of Nothobryinae systematics

Abstract

A new species of Capbrya from Brazilian Caatinga is described and illustrated in detail. Capbrya brasiliensis sp. n. is the first record of the genus outside South Africa. We provide the first complete and labelled dorsal chaetotaxy description of the genus including the S-chaetotaxy of tergal segments, and the complete trunk dorsal chaetotaxy of the first instar, described for the first time for the whole Nothobryinae. C. brasiliensis sp. n. differs from Capbrya marshalli and Capbrya themeda by ventral head and dorsal trunk chaetotaxy, postantennal organ size, metatrochanteral organ, empodial complex and manubrial plate morphology. We redrew and interpreted the published chaetotaxies of C. marshalli and Hispanobrya barrancoi and analysed specimens of Nothobrya sertaneja, Nothobrya sp.1 and Nothobrya sp.2. After the morphological comparison, we propose the subdivision of Nothobryinae in two tribes and their inclusion in the family Orchesellidae: the tribe Nothobryini for Nothobrya and the tribe Capbryini for Capbrya and Hispanobrya. We also provide an update to the identification key of Capbrya, Hispanobrya and Nothobrya species, now including C. brasiliensis sp. n.; and an update to Nothobrya diagnosis, including now its S-chaetotaxy formula and labial chaetae.