Species Pachybrachis m-nigrum

Classification · Synonyms and other taxonomic changes · Size · Identification · Range · See Also · Print References · Works Cited

Cylindrical leaf beetle - Pachybrachis m-nigrum

Unknown Coleoptera - Pachybrachis m-nigrum

Pachybrachis m-nigrum (Melsheimer) - Pachybrachis m-nigrum

Classification

Kingdom Animalia (Animals)

Phylum Arthropoda (Arthropods)

Subphylum Hexapoda (Hexapods)

Class Insecta (Insects)

Order Coleoptera (Beetles)

Suborder Polyphaga

No Taxon (Series Cucujiformia)

Superfamily Chrysomeloidea (Longhorn and Leaf Beetles)

Family Chrysomelidae (Leaf Beetles)

Subfamily Cryptocephalinae (Case-bearing Leaf Beetles)

Tribe Cryptocephalini

Subtribe Pachybrachina

Genus Pachybrachis (Scriptured Leaf Beetles)

Species m-nigrum (Pachybrachis m-nigrum)

Synonyms and other taxonomic changes

Pachybrachis m-nigrum (Melsheimer)

Orig. Comb: Cryptocephalus m-nigrum Melsheimer 1847

Size

Length 2.46–3.16 mm (1)

Identification

Det. E. G. Riley, 1998

This species was often found misidentified in collections as P. intricatus or P. picturatus. It cannot be reliably distinguished from P. deceptor except by examination of the male genitalia. On average, however, there is a tendency for the overall size to be smaller and for the yellow markings on the body and legs to be more extensive, but these differences are not definitive. (1)

Range

MO-SC-ME-MI, range overlaps some w/ P. deceptor in the west (1)

See Also

Most specimens of P. deceptor received on loan were consistently misidentified as P. m-nigrum, and, indeed, this new species is externally indistinguishable from that species.

On average, however, there is a tendency for the overall size of P. deceptor to be a little larger and for the yellow markings on the body and legs to be more reduced; however, these differences are not definitive. (1)

Pachybrachis deceptor Riley & Barney, 2015

PARATYPE

Print References

Melsheimer, F.E. 1847. Descriptions of new species of Coleoptera of the United States. Proceedings of the Academy of Natural Sciences of Philadelphia, 3: 158-181.

Works Cited

1.	Definition and revision of the viduatus species-group of North American Pachybrachis Chevrolat (Chrysomelidae: Cryptocephalinae) Riley, E.G. and R.J. Barney. 2015. The Coleopterists Bulletin 69(1): 25–59.

Contributed by Phillip Harpootlian on 2 July, 2009 - 9:43am
Additional contributions by Mike Quinn
Last updated 15 August, 2015 - 1:18pm

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