A New Species of Pacificampa (Diplura: Campodeidae) from Akiyoshidai, Honshu Island, Japan, and the Phylogenetic Position of the Genus
TL;DR
The phylogenetic position of Pacificampa remains unclear, but the present phylogeny based on the 18S rRNA gene indicates a close relationship between Pacificampa and the campodeid genus Metriocampa Silvestri, 1911 and suggests the non-monophyly of the subfamily Campodeinae.
Abstract
A new troglobitic dipluran species of the campodeid genus Pacificampa Chevrizov, 1978, P. dodecas sp. nov., collected from four caves in Akiyoshidai district, Yamaguchi Prefecture, Japan, is described. This new species is clearly distinguishable from other congeners by the following characteristics: body size, macrosetae distribution on the mesonotum and tergite, and the ratio of the antenna length to the body length. Additionally, partial sequences of the mitochondrial cytochrome c oxidase subunit I gene extracted from specimens collected from the four caves support the con-specificity of the populations, which form a lineage distinct from those of other Japanese Pacificampa species. Although the phylogenetic position of Pacificampa remains unclear, the present phylogeny based on the 18S rRNA gene indicates a close relationship between Pacificampa and the campodeid genus Metriocampa Silvestri, 1911. Furthermore, the present molecular phylogeny suggests the non-monophyly of the subfamily Campodeinae.