New genera and species of Neotropical Exosternini (Coleoptera, Histeridae)

Abstract

We describe the following 8 new genera and 23 new species of Neotropical Exosternini. Conocassis gen. n. (Conocassis minor sp. n. [type species], Conocassis dromedaria sp. n., Conocassis trisulcata sp. n., and Conocassis invaginata sp. n.), Enkyosoma gen. n. (Enkyosoma rockwelli sp. n.), Pluricosta gen. n. (Pluricosta onthophiloides sp. n.), Pyxister gen. n. (Pyxister devorator sp. n. [type species] and Pyxister labralis sp. n.), Chapischema gen. n. (Chapischema doppelganger sp. n.), Scaptorus gen. n. (Scaptorus pyramus sp. n.), Lacrimorpha gen. n. (Lacrimorpha glabra sp. n. [type species], Lacrimorpha balbina sp. n., Lacrimorpha subdepressa sp. n., and Lacrimorpha acuminata sp. n.), Crenulister gen. n. (Crenulister grossus sp. n. [type species], Crenulister explanatus sp. n., Crenulister dentatus sp. n., Crenulister impar sp. n., Crenulister umbrosus sp. n., Crenulister simplex sp. n., Crenulister paucitans sp. n., Crenulister spinipes sp. n., and Crenulister seriatus sp. n.) These all represent highly distinctive and phylogenetically isolated forms, almost invariably known from very few specimens. All but one species have been collected only by passive flight intercept traps, and nothing significant is known about the biology of any of them.

Figure 5 from: Caterino MS, Tishechkin AK (2020) Recognition and revision of the Phelister blairi group (Histeridae, Histerinae, Exosternini). ZooKeys 1001: 1-154. https://doi.org/10.3897/zookeys.1001.58447

“…Still, the majority (39 spp.) do fall out together, together constituting most of a clade, the only exceptions being a few small genera which have been named as distinct (including Crenulister Caterino & Tishechkin, [2014], to which one of the species we describe here might possibly be related). This large lineage includes most members of the blairi, gregarius, and amazoniae subgroups with the blairi subgroup appearing potentially paraphyletic with respect to the others.…”

Figure 4 from: Caterino MS, Tishechkin AK (2020) Recognition and revision of the Phelister blairi group (Histeridae, Histerinae, Exosternini). ZooKeys 1001: 1-154. https://doi.org/10.3897/zookeys.1001.58447

“…Remarks. This species may represent a connection between this group of Phelister and the recently described genus Crenulister (Caterino and Tishechkin 2014). We have debated whether it belongs there, lacking a few characters of that genus (and lacking confirmation from male genitalia).…”

Mountains as Islands: Species Delimitation and Evolutionary History of the Ant-Loving Beetle Genus Panabachia (Coleoptera, Staphylinidae) from the Northern Andes

“…Polymerase chain reaction was used to amplify two molecular markers: COI and wingless. The mitochondrial gene COI was amplified using the primers C1-J-2183 (5 -CAACATTTATTTTGATTTTTTGG-3 ) and TL2-N-3014 (5 -TCCAATGCACTAATCTGCCATATTA-3 , [39]) following the amplification profile described by Caterino and Tishechkin (2014) [40]. For the nuclear gene wingless, we used the primers wg550f (5 -ATGCGTCAGGARTGYAARTGYCAYGGYATGTC-3 ) and wgAbRZ (5 -CACTTNACY TCRCARCACCARTG-3 , [41]) following the amplification profile described by Parker and Grimaldi (2014) [42].…”