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Descriptions of four new species of Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) of the eastern USA.
By Barney, R.J.
The Coleopterists Bulletin, 73(1):67-75., 2019
Cite: 1647551 with citation markup [cite:1647551]
BioOne

Barney, R.J. 2019. Descriptions of four new species of Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) of the eastern USA. The Coleopterists Bulletin, 73(1):67-75.

Abstract

Four new species of Pachybrachis Chevrolat, 1836 in the eastern USA are described: Pachybrachis cubs Barney, new species; Pachybrachis ekstromorum Barney, new species; Pachybrachis troosevelti Barney, new species; and Pachybrachis zellersorum Barney, new species. Pachybrachis zellersorum belongs to the Pachybrachis viduatus species-group, and the other three new species belong to the Pachybrachis atomarius species-group. A description, figure, and range map are presented for each new species. Couplets in published keys are modified to accommodate the new species.

During the course of my extensive review of the Pachybrachis Chevrolat, 1836 of the eastern USA, six species-groups were recognized, and 20 new species were described (Riley and Barney 2015; Barney 2016a, b, 2017a, b, 2018a, b). Herein I describe an additional four new species and provide couplets to previously published species-group keys to incorporate these new species.

Results

1. Pachybrachis zellersorum Barney, new species
2. Pachybrachis ekstromorum Barney, new species
3. Pachybrachis cubs Barney, new species
4. Pachybrachis troosevelti Barney, new species