Pachybrachis tridens
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Ordo: Coleoptera
Familia: Chrysomelidae
Genus: Pachybrachis
Name
Pachybrachis tridens (F. E. Melsheimer, 1847) – Wikispecies link – Pensoft Profile
- Cryptocephalus tridens F. E. Melsheimer, 1847: 172.
- Cryptocephalus flavicornis F. E. Melsheimer, 1847: 172.
- Pachybrachys mollis Haldeman, 1849: 263.
Recognition
Color pale yellow with broad, sharply limited, black markings; antennae (usually) and legs entirely yellow (Habitus 16). Lustre dull. Eyes separated by about twice length of basal antennomere in male, and by two and one-half to three times length of this antennomere in female. Ocular lines fine. Front claws of male not enlarged (as in Figure 4c); male size small: length 1.93 ± 0.10 mm, width 1.01 ± 0.04 mm.
Distribution
Pachybrachis tridens is an eastern species distributed from Manitoba to Texas to the Atlantic Coast in the United States (Riley et al. 2003[1]), and restricted to the Carolinian Zone of southern Ontario in eastern Canada (Map 16).
Material examined
ONTARIO: Prince Edward Co., 21–28.VI.1950, J. F. Brimley [3♂ 5♀, CNC].
Host plants
No records are available from the specimens examined. Poison ivy (Toxicodendron radicans (L.) Kuntze) (Anachardiaceae) was given as the preferred host by Fall (1915)[2], Blatchley (1924a)[3], Wilcox (1954[4], 1979[5]), Furth (1985)[6], and others. A complete list of citations is found in Clark et al. (2004)[7].
Comments
Since Pachybrachis tridens has not been collected in the last 55 years, it can be considered as extirpated from the Canadian fauna. Formerly, it was probably restricted to the Carolinian Life Zone, which is now reduced to minute remnants. For this reason, the Manitoba record reported by LeSage (1991)[8] and Riley et al. (2003)[1], and the Québec record cited by Riley et al. (2003)[1] are questionable. No specimens were available to confirm them.
Taxon Treatment
- Barney, R; LeSage, L; Savard, K; 2013: Pachybrachis (Coleoptera, Chrysomelidae, Cryptocephalinae) of Eastern Canada ZooKeys, 332: 95-175. doi
Other References
- ↑ 1.0 1.1 1.2 Riley E, Clark S, Seeno T (2003) Catalog of the leaf beetles of America north of Mexico (Coleoptera: Megalopodidae, Orsodacnidae and Chrysomelidae, excluding Bruchinae). Coleopterists Society, Special Publication no. 1, 290 pp.
- ↑ Fall H (1915) A revision of the North American species of Pachybrachys. Transactions of the American Entomological Society 41: 291-486.
- ↑ Blatchley W (1924a) The Chrysomelidae of Florida. The Florida Entomologist 7: 33–39, 49–57.
- ↑ Wilcox J (1954) Leaf beetles of Ohio (Chrysomelidae: Coleoptera). Ohio Biological Survey, Bulletin no. 43: 353-506.
- ↑ Wilcox J (1979) Leaf beetle host plants in Northeastern North America (Coleoptera: Chrysomelidae). North American Beetle Fauna Project. World Natural History Publications, Kinderhook, New York, 30 pp.
- ↑ Furth D (1985) The natural history of a sumac tree, with emphasis on the entomofauna. Transactions of the Connecticut Academy of Arts and Sciences 46: 137-234.
- ↑ Clark S, LeDoux D, Seeno T, Riley E, Gilbert A, Sullivan J (2004) Host plants of leaf beetle species occurring in the United States and Canada. The Coleopterists Society, Special Publication No. 2, 476 pp.
- ↑ LeSage L (1991) Family Chrysomelidae leaf beetles. In: Bousquet Y (Ed) Checklist of beetles of Canada and Alaska. Research Branch, Agriculutre Canada. Publication 1861/E., Ottawa, 301–323.
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