On a desmitracheate "micronetine" Nippononeta alpina

The phylogenetic analyses based on molecular data demonstrate that all "micronetine" species of a desmitracheate system form a monophyly. Macrargus Dahl, 1886 is a "micronetine" genus, the species of which have a haplotracheate system in general, while Macrargus alpinus Li & Zhu, 1993 was found to have a desmitracheate system; this makes its generic placement problematic. According to the results of phylogenetic analysis, we transfer Macrargus alpinus to another genus as Nippononeta alpina (Li & Zhu, 1993), comb. n ., and provide a redescription of its genital characters and somatic features. Comparisons with other "micronetine" species with a desmitracheate system are provided. Putative synapomorphies for Nippononeta , the clade Nippononeta + Agyneta , and for the "desmitracheate micronetines" clade, as well as their relationship with Helophora , are provided and discussed.