ISSN 1313-2970 (online) ISSN 1313-2989 (print)

ZooKeys 1001 A peer-reviewed open-access journal

2020

Launched to accelerate research The genus Phelister represents one of the largest radiations of histerid in the neotropics, yet its has received little attention. While comprising only about 200 described species, hundreds more are by Recognition and r evision of the P

known and await description. Identification of the species has been very Michael S. Caterino, Alexey K. Tishechkin Recognition and revision of difficult. And where to draw the boundary between Phelister and other the Phelister blairi group neotropical genera of Exosternini has also been contentious. (, Histerinae, Yet these predatory beetles are abundant, and may offer valuable data to efforts to track fauna shifts in the face of climate and land-use changes. Exosternini) They are often found in association with decaying carcasses, and have been promoted as important tools in forensic investigations. And other species have been used to help control flies that breed in cattle dung, where these beetles may be abundant. Beyond potentially practical uses, these beetles also show an array of symbiotic relationships with social by

heliste r Michael S. Caterino, Alexey K. Tishechkin , and probably have an interesting evolutionary story to tell. So, a well-resolved taxonomic system offers many benefits.

In this study we hypothesize the existence of a novel clade of Phelister, r i g r blai which we informally refer to as the Phelister blairi group. Only 8 of the 49 species we assign to this group have been previously described. Here we oup ( H iste r idae, H iste r inae, E xoste r nini) describe 41 additional new species, providing a key for their identification. Descriptions are augmented with high-resolution photographs and hand- drawn diagnostic images of various characters. We also update previous analyses of the phylogeny of Phelister to test this group’s monophyly and to try and determine its relationships within the broader exosternine radiation.

Phelister fraternus Caterino & Tishechkin, sp. nov.

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