The parasitic isopod family Cabiropidae is known to utilise various isopods but lacks records of members parasitising Anthuroidea. We describe Anthuroniscus gen. nov. for three new cabiropid species, Anthuroniscus shimomurai sp. nov., Anthuroniscus dentatus sp. nov. and Anthuroniscus latus sp. nov., all of which are parasitic on anthuroid isopods. This is the first study reporting Cabiropidae from Japan and anthuroids as hosts for not only Cabiropidae but also Cryptoniscoidea. (Image credit: Shoki Shiraki.)

Species of the genus Eubranchus Forbes, 1838 are common in boreal benthic ecosystems. Recent studies suggest the trans-Arctic Eubranchus rupium (Møller, 1842) is a species complex. This paper conducts an integrative taxonomic study of Eubranchus rupium and related species, confirming its amphiboreal distribution. The divergence of the species complex is estimated from the late Miocene or the Miocene–Pliocene boundary to the late Pliocene with the north-western Pacific as the probable ancestral region, followed by dispersal and allopatric speciation. (Image credit: Darya Grishina.)

Tribal relationships within the braconid subfamily Rogadinae are reconstructed based on nuclear UCE data and extensive taxon sampling. Our fully supported estimate of phylogeny and the morphological evidence led us to erect a new rogadine tribe, Gondwanocentrini Shimbori & Zaldívar-Riverón trib. nov. Facitorini was also confirmed as a separate rogadine tribe. Our updated classification expands the number of tribes and genera within Rogadinae to 8 and 66 respectively. (Image credit: Eduardo M. Shimbori.)