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The New World genus Axina Kirby (Coleoptera: Cleridae) is revised for the first time. Thirty-two new species are described: Axina acutipennis, A. adelosa, A. atmis, A. bahia, A. bella, A. brunnea, A. chiasta, A. furcula, A. heveli, A. ignota, A. klisis, A. latilinea, A. lobispinula, A. luzia, A. macilenta, A. megaspina, A.minas, A. ochra, A. oligocheia, A. ordinis, A. orcastomata, A. pallidioccabus, A. phallospina, A. piperata, A. pollex, A. polycaula, A. rio, A. schenklingi, A. spina, A. trinalis, A. villa, and A. vista. The 19 previously described species are: Axina analis Kirby, A. apicalis Pic, A. basalis Schenkling, A. bifasciata (Chevrolat), A. centrimaculata Schenkling, A. conspicua Schenkling, A. diversesignata Pic, A. equestris (Schenkling), A. fasciata Kirsch, A. fortipes Pic, A. lateralis Pic, A. longevittata Pic, A. munda Schenkling, A. nigrifrons Schenkling, A.parcepunctata Schenkling, A. picta Schenkling, A. plagiata Schenkling, A. proxima (Chevrolat), and A. sexmaculata Spinola. Two species Priocera equestris Schenkling and Priocera proxima Chevrolat, are transferred into the genus Axina becoming new combinations: Axina equestris (Schenkling) and Axina proxima (Chevrolat). Two names, Priocera podagrica Schenkling, 1900, and P. podagrica variety pygmaea Schenkling, 1902, are new synonymies of Priocera proxima Chevrolat, 1876. Lectotypes are here designated for nine species: Axina basalis Schenkling, 1900; Axina centrimaculata Schenkling, 1900; Axina conspicua Schenkling, 1900; Axina diversesignata Pic, 1946; Axina munda Schenkling, 1900; Axina nigrifrons Schenkling, 1906; Axina parcepunctata Schenkling, 1900; Axina picta Schenkling, 1907; and Axina plagiata Schenkling, 1900. It is proposed that Axina species are predators of lignicolous insects, particularly bark beetles. The species of Axina can be classified into eight species groups and a theory of their phylogenetic relationships is proposed via WINCLADA in conjunction with NONA. Of the 51 species that now comprise Axina, only one traversed the Panamanian portal before the Colombian Andes reached their modern altitudes. This work includes a generic-level morphological analysis, brief treatise of natural history, key to species, comments about Axinazoogeography, and hypotheses of species-group phylogeny.
A new species of the genus Mesobiotus is described from the Republic of South Africa using a traditional morphological approach (light and scanning electron microscopy) combined with molecular analysis (18S rRNA, 28S rRNA, ITS-2 and COI markers). Mesobiotus anastasiae sp. nov. differs from all known Mesobiotus species by having a unique combination of characters of the adult animals and the eggs. Adults of the new species have an oral cavity armature without elongate teeth in the second band, while the processes of the egg chorion have a basal collar and distinct rows of large pores. An updated key to the species of the genus Mesobiotus, including 66 of 70 currently described species, is given. An aquatic mite species from the Lobohalacarus weberi complex (freshwater Halacaridae) co-occurs with M. anastasiae sp. nov., suggesting that the newly described tardigrade inhabits constantly wet moss cushion habitats.