Pachybrachis pectoralis
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Ordo: Coleoptera
Familia: Chrysomelidae
Genus: Pachybrachis
Name
Pachybrachis pectoralis (F. E. Melsheimer, 1847) – Wikispecies link – Pensoft Profile
- Cryptocephalus pectoralis F. E. Melsheimer, 1847: 171.
- Pachybrachis sobrinus Haldeman, 1849: 262.
- Pachybrachis oculatus Suffrian, 1852: 178.
- Pachybrachis sticticus Blatchley, 1910: 1130.
Recognition
Form, especially of the male, narrower than usual; color dull yellow, maculate with brown or black (Habitus 13); surface not or scarcely shining; eyes narrowly separated; ocular lines present (Figure 1a); front tibiae sinuate on inner margin beyond middle; front claws of male obviously, though not greatly, enlarged; male size small: length 1.92 ± 0.07 mm, width 0.96 ± 0.04 mm.
Distribution
Eastern species distributed from Nebraska to Texas to Atlantic Coast in the United States (Riley et al. 2003[1]). In eastern Canada, Pachybrachis pectoralis has been found in southern Ontario and the Ottawa Valley in Québec (Map 13).
Material examined
ONTARIO: Hastings Co., 10.vii.1938, J. F. Brimley [2♀, CNC]; same data, except 5.VIII.1957 [1♀, CNC]; Muskoka Dist., Norway Point Lake of Bays, 30.XI.1922, J. McDunnough [1♀, CNC]; Prince Edward Co., 3.VIII.1938, J. F. Brimley [3♂ 3♀, CNC]; Kawartha Gull Lake, 2.VIII.1943, J. F. Brimley [2♂, CNC]; same data, except 19.VII.1950 [1♀, CNC]; Toronto Co., Toronto, 15–30.VI.1927, L. J. Milne [1♀, CNC]; Unknown Co., East Ontario [1♂, CNC].
QUÉBEC: Gatineau Co., Mont King, Parc de la Gatineau, 19.VIII.1996, L. LeSage [8♂ 13♀, CNC]; same data, except 6.IX.1996 [1♀, CNC]; same data, except 28.V.1997 [1♀, CNC]; same data, except 21.VII.1997 [1♂ 3♀, CNC]; Pontiac Co., Luskville, 4.VII.1985, ex. Quercus rubra L. Larochelle & Larivière [1♀, CNC]; same data except 30.VII.1985, ex. Quercus alba L. [1♂, CNC]; Vaudreuil Co., Rigaud, A. Robert [2♂ 2♀, CEUM]; same data, except 20.VIII.1984, ex. Quercus rubra L., Larochelle & Larivière [2♂, CNC]; same data except 19.VIII.1985, ex. Quercus rubra L., Larochelle & Larivière [1♀, CNC].
Host plants
No information is available from the specimens examined. According to Blatchley (1924a[2], b[3]), Fall (1915)[4], Barney (1984)[5] and Clark (2000)[6], Pachybrachis pectoralis is associated with common locust (Robinia pseudoacacia L.) (Fabaceae). Larochelle’s specimens were found on Quercus alba L. and Quercus rubra L. Additional potential hosts are given in Clark et al. (2004)[7].
Comments
No specimens from New Brunswick and Nova Scotia, from where this species was reported by LeSage (1991)[8] and Riley et al. (2003)[1], were located, although the material of all the important collections of eastern Canada was examined. The Ottawa River Valley is the northernmost limit of Pachybrachis pectoralis, in Québec. This species may extend further north to the Maritime Provinces along the Atlantic Coast, but it has not yet been recorded from Maine (Riley et al. 2003[1]; Majka et al. 2011[9]).
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.
- ↑ Blatchley W (1924a) The Chrysomelidae of Florida. The Florida Entomologist 7: 33–39, 49–57.
- ↑ Blatchley W (1924b) The Chrysomelidae of Florida. The Florida Entomologist 8: 1–7, 17–23, 39–46. doi: 10.2307/3492448
- ↑ Fall H (1915) A revision of the North American species of Pachybrachys. Transactions of the American Entomological Society 41: 291-486.
- ↑ Barney R (1984) Records of Pachybrachis in Illinois (Coleoptera: Chrysomelidae). The Great Lakes Entomologist 17(3): 137-144.
- ↑ Clark S (2000) An annotated list of the leaf beetles of West Virginia (Coleoptera: Orsodacnidae, Megalopodidae, Chrysomelidae exclusive of Bruchinae). Occasional Publications of the West Virginia Department of Agriculture 1: 1-93.
- ↑ 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.
- ↑ Majka C, Chandler D, Donahue C (2011) Checklist of the beetles of Maine. Empty Mirroirs Press, Halifax, Nova-Scotia, Canada, 328 pp.
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