Pachybrachis m-nigrum
(Melsheimer, 1847)
Pachybrachis m-nigrum is a of case-bearing leaf beetle in the Chrysomelidae, first described by Melsheimer in 1847. The specific epithet 'm-nigrum' refers to a distinctive black marking shaped like the letter 'M' on the . Like other members of the Pachybrachis, it constructs protective cases from fecal material. The species is documented from eastern Canada and has been recorded in the southwestern United States.
Pronunciation
How to pronounce Pachybrachis m-nigrum: /ˈpækɪˌbreɪkɪs ɛmˈnɪɡrəm/
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Identification
Distinguished from other Pachybrachis by the characteristic black 'M'-shaped marking on the , referenced in the specific epithet. As a case-bearing leaf beetle, carry a portable case constructed from dried fecal material, a trait shared with other members of the Cryptocephalinae.
Distribution
Eastern Canada (New Brunswick, Québec) and southwestern United States (Arizona).
Behavior
Constructs and carries a protective case made from dried fecal material, typical of case-bearing leaf beetles in the Cryptocephalinae.
Similar Taxa
- Other Pachybrachis speciesShare case-bearing and general body form; distinguished by specific elytral markings, particularly the 'M'-shaped black marking in P. m-nigrum.