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Species Pachybrachis othonus

 
 
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Geographical variation in Pachybrachis othonus (Coleoptera: Chrysomelidae) with descriptions of a new subspecies
By Edward U. Balsbaugh
Annals of the Entomological Society of America, Volume 66, Issue 2, Pages 252–261, 1973

Definition and revision of the cylindricus Species-Group of Pachybrachis (Chrysomelidae), including descriptions of six new spp.
By Barney, R.J.
The Coleopterists Bulletin 75(4): 723-748., 2021
BioOne

Barney, R.J. 2021. Definition and revision of the cylindricus Species-Group of North American Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae), including descriptions of six new species. The Coleopterists Bulletin 75(4): 723-748.

Abstract

Six new species of Pachybrachis Chevrolat from the southwestern United States are described.

Pachybrachis ashfork Barney, new species,
Pachybrachis ephedra Barney, new species,
Pachybrachis huachuca Barney, new species,
Pachybrachis hurricane Barney, new species,

Redescription of five species of Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) of the Western USA.
By Barney, R.J.
The Coleopterists Bulletin 75(2):485-496., 2021
BioOne

Barney, R.J. 2021. Redescription of five species of Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) of the Western USA, including new synonymies, records of greatly expanded ranges into the Eastern USA, and new plant associations. The Coleopterists Bulletin 75(2): 485-496.

Abstract

An effort to identify a series of Pachybrachis Chevrolat, 1836 specimens from an eastern USA nature preserve led to the study of five western USA species:

Pachybrachis alticola Fall,
Pachybrachis conspirator Fall,

Redescription of four predominantly yellow, densely punctate species of Pachybrachis of the W. USA, and Description of a New Sp.
By Barney, R.J.
The Coleopterists Bulletin 74(4): 637-646. , 2020
BioOne

Barney, R.J. 2020. Redescription of four predominantly yellow, densely punctate species of Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) of the western USA, and description of a new species, The Coleopterists Bulletin 74(4): 637-646.

Abstract

A new species of Pachybrachis Chevrolat from the western United States is described.

Key to all sixty-four species of Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) in the eastern USA.
By Barney, R.J.
The Coleopterists Bulletin, 73(1): 85-96., 2019
BioOne

Barney, R.J. 2019. Key to all sixty-four species of Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) in the eastern USA. The Coleopterists Bulletin, 73(1): 85-96.

Abstract

A key to the males of all 64 species of Pachybrachis Chevrolat, 1836 (Coleoptera: Chrysomelidae: Cryptocephalinae) currently known from the eastern USA is presented. Type, figure, and map citations from the literature are given for each species. Pachybrachis newmani Jacobson is reported as a replacement name for Pachybrachi

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
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.

Definition and revision of the atomarius species-group of NA Pachybrachis (Chrysomelidae: Cryptocephalinae), including 9 n. spp.
By Barney, R.J.
The Coleopterists Bulletin 72(1): 9-74., 2018
BioOne

Barney, R.J. 2018. Definition and revision of the atomarius species-group of North American Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae), including descriptions of nine new species. The Coleopterists Bulletin 72(1): 9-74.

Abstract

The atomarius species-group of Nearctic Pachybrachis Chevrolat, 1836 is defined and revised.

The group is composed of 24 species:

Pachybrachis archboldi Barney;
Pachybrachis atomarius (F. E. Melsheimer);

Definition and revision of the luridus species-group of North American Pachybrachis Chevrolat (Chrysomelidae: Cryptocephalinae).
By Barney, R.J.
The Coleopterists Bulletin 71(1): 1-45., 2017
BioOne

Barney, R.J. 2017. Definition and revision of the luridus species-group of North American Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae). The Coleopterists Bulletin 71(1): 1-45.

Abstract
The luridus species-group of Nearctic Pachybrachis Chevrolat, 1836 is defined and revised.

The group is composed of ten species, including two described as new species:
Pachybrachis confusus Bowditch,
Pachybrachis dilatatus Suffrian,
Pachybrachis discoideus Bowditch,
Pachybrachis femoratus (Olivier),

 
 
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