Pachybrachis obsoletus
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Ordo: Coleoptera
Familia: Chrysomelidae
Genus: Pachybrachis
Name
Pachybrachis obsoletus Suffrian, 1852 – Wikispecies link – Pensoft Profile
- Pachybrachys obsoletus Suffrian, 1852: 200.
Recognition
Background color yellow, with numerous, usually not sharply outlined black spots on both pronotum and elytra (Habitus 10); eyes distant; ocular lines faint; male size small: length 1.87 ± 0.16 mm, width 0.98 ± 0.08 mm.
Distribution
Species broadly distributed from North Dakota to New Mexico to Atlantic Coast in the United States (Riley et al. 2003[1]), and in Canada from British Columbia to New Brunswick. In eastern Canada, it is found in Ontario, Québec and New Brunswick (Map 10).
Material examined
NEW BRUNSWICK: Kent Co., Kouchibouguac National Park, 21.VII.1977, Code 5680L, D. J. Brown [1♀, CNC]; same data, except 17.VII.1978, Code 7291K, D. B. Lyons [1♀, CNC]; Queens Co., Canning Grand Lake near Flowers Cove, 1.VII.2004, D. Sabine and R. Webster [2♂ 2♀, RWIC]; White’s Cove, Grand Lake, 24.VII.1957, ex. Salix lucida [2♂ 2♀, CNC]; Sunbury Co., 9.5 km NE Jct. 101 & 645, 22.VII.2007, R. P. Webster [1♀, RWIC]; York Co., Fredericton, French Lake, 20.VII.1931, C. W. Maxwell [1♀, LEM]; Fredericton, 22.VII.1936, R. E. Balch [1♀, CNC]; French Lake, 2.VI.1928, W. J. Brown [1♀, CNC].
ONTARIO: Carleton Co., Carp, 5.VII.1932, W. J. Brown [1♂, CNC]; Merivale, 16.VII.1936, W. J. Brown [2♀, CNC]; Stittsville, 18.VII.1963, J. F. McAlpine [1♂, CNC]; Stittsville, 18.VIII.1963, Malaise trap [1♀, CNC]; Durham Co., Durham, VI.1969, [1♀, CNC]; Hastings Co., 10.VII.1938, J. F. Brimley [2♀, CNC]; same data, except 16.VII.1950 [2♀, CNC]; same data, except 31.VI.1936 [1♀, CNC]; Marmora, 19.VI.1952, J. R. Vocheroth [1♂, CNC]; same data, except 4.VII.1952, J. R. McGillis [1♀, CNC]; same data, except 18.VIII.1952, E. H. N. Smith [1♀, CNC]; Kent Co., Tilbury, 20.VIII.1947, on willow, S. D. Hicks [1♀, CNC]; Lambton Co., Grand Bend, 11.VII.1939, G.E. Shewell [1♀, CNC]; same data except 20.VII.1939 [1♀, CNC]; Lanark Co., Bell’s Corners, 6.VI.1942, F.I. Survey 1942, Rec 5436C, White Pine [1♀, CNC]; Leeds Co., Mulcaster Island, Saint-Lawrence Island National Park, 17.VIII.1976, Sweeping Pinus strobus, Code 4438, W. Reid [1♀, CNC]; Thwartway Island, Saint-Lawrence Island National Park, 18.VII.1976, Malaise trap, Code 4147-M, W. Reid [3♀, CNC]; Middlesex Co., Coldstream, 22.VI.1922, A. A. Wood [1♂ 5♀, CNC]; Nipissing Co., North Bay, 11.VII.1972, E. J. Kiteley [1♂, CNC]; Peterborough Co., 3.VII.1958, J. F. Brimley [1♀, CNC]; Prescott, Co., Alfred Bog, 7.VI.1982, sweeping vegetation in a bog, L. LeSage [2♂, CNC]; Prince Edward Co., 12.VII.1914, J. F. Brimley [1♀, CNC]; same data, except 29.XI.1914 [1♀, CNC]; same data, except 11.VII.1920 [1♂, CNC]; same data, except 15–30.VII.1922, J. F. Brimley [3♀, CNC]; same data, except 19.VI.1926 [1♀, CNC]; same data, except 6.VII.1935 [1♂, CNC]; same data, except 28.VI.1936 [1♀, CNC]; same data, except 26.VII.1936 [1♀, CNC]; same data, except 17.VIII.1938 [1♀, CNC]; same data, except 9.VII.1941 [1♀, CNC]; same data, except 5.VII.1942 [3♀, CNC]; same data, except 18.VI.1947 [1♀, CNC]; same data, except 29.VIII.1948 [1♀, CNC]; same data, except 29.VI.1949 [1♀, CNC]; same data, except 31.VIII.1949 [1♂, CNC]; same data, except 19.VII.1950 [1♀, CNC]; same data, except VII.1953 [2♂ 4♀, USNM]; same data, except 24.VII.1955 [1♀, CNC]; same data, except 29.VII.1956 [4♂ 10♀, CNC]; same data, except 26.VI.1966 [1♀, CNC]; Renfrew Co., Chalk River, 3.VIII.1937, J. M. Cameron [1♀, LEM]; Russell Co., Mer Bleue, 30.VI.1932, W. J. Brown [1♀, CNC]; same data, except 17.VII.1936 [1♀, CNC]; same data, except 2.VII.1938, G. E. Shewell [1♂, CNC]; Sudbury Co., Sudbury, 4.VIII.1979, R. S. Anderson [1♀, CNC]; Thunder Bay Dist., Black Sturgeon Lake, 1–15.VIII.1956, Lindberg [1♂1♀, CNC]; Jarvis Island, 20.VIII.1952, on white pine, J. F. McAlpine [1♂, CNC]; Manitouwadge, 22.VI.1988, T. Baker [1♂, CNC]; same data, except 30.VII.1992 [1♂, CNC]; Toronto Co., Toronto, 27.V.1896, H. R. [1♀, LEM]; Quetico Provincial Park, 8.VIII.1982, C. B. Barr [2♀, LSAM]; Unknown Co., East Ontario [1♀, CNC].
QUÉBEC: Abitibi Co., Duparquet, 7.VIII.1983, ex. Pinus banksiana Lamb., A. Larochelle [1♀, CNC]; Berthier Co., Berthierville, 8.VII.1950, A. Robert [1♀, CEUM]; Lanoraie, VII.1935, G. Chagnon [1♀, H. C. Fall, CEUM]; Charlevoix-Est Co., Clermont, 17.VIII.1982, ex. Pinus strobus L., A, Larochelle [2♀, CNC]; Port-au-Saumon, 19.VIII.1982, ex. spruce sp., A. Larochelle [1♂, CNC]; Drummond Co., Saint-Cyrille, 10.VII.1982, ex. Cassandra calyculata, L. LeSage [1♂ 1♀, CNC]; Gatineau Co., Wakefield, 5.VIII.1974, ex. Pinus strobus, R. Sexton [1♀, CNC]; Île-Jésus Co., Île-Jésus, 5.VII.1935, G. Chagnon [1♀, CEUM]; Montcalm Co., Parc du Mont-Tremblant, 13.VIII.1932, A. Robert [1♂, CEUM]; Montgomery Co., Saint-Jean-d’Orléans, 22.VII.1957, J. L. Laliberté [1♀, IDM]; Montmagny Co. Montmagny, 8.VIII.1981, ex. Pinus strobus L., A. Larochelle [1♀, CNC]; Pontiac Co., Beech Grove, 15.VIII.1948, S. D. Hicks [3♀, CNC]; Saguenay Co., Grandes-Bergeronnes, 15.VIII.1982, ex. Pinus resinosa Ait., A, Larochelle [1♀, CNC]; Stanstead Co., Barnston, 26.VIII.1984, ex. Thuya sp., Larochelle & Larivière [1♀, CNC]; Terrebonne Co., Terrebonne, 1.VII.1933, J. Ouellet [1♀, CEUM]; Vaudreuil Co., Rigaud, 19.VII.1985, ex. Pinus strobus L., Larochelle & Larivière [2♀, CNC]; same data except 20.V.1977, sweeping sumac sp., E. J. Kiteley [1♀, CNC]; Saint-Lazare, 6.VIII.1985, ex. Betula papyrifera Marsh., A. Larochelle [1♂, CNC].
Host plants
Pachybrachis obsoletus may be associated with peat bogs in eastern Canada. Specimens were collected in Alfred Bog (Pope 2011[2]), and Mer Bleue (NCC 2011b[3]; Wikipedia 2011[4]), two well-known bogs of Ontario. The Lanoraie specimens, in Québec, were collected in an ecological preserve, which includes several fens and bogs (MDDEP 2011[5]). Larochelle specimens, also from Québec, had a wide range of potential plant associations. Leather leaf (Cassandra calyculata (L.) D. Don.) (Ericaceae) is definitively a host (LeSage, collecting and personal observations), whereas the beetles’ presence on white pine (Pinus strobus) (Pinaceae) is very likely incidental. Sweeping from willows (Salix spp.) (Salicaceae) was reported by Barney et al. (2011)[6]. Additionally, Pachybrachis obsoletus was reported as causing light injury to cultivated roses in Saskatoon, Saskatchewan, but the species identification cannot be confirmed (Arnason 1942[7], 1943[8]; Arnason et al. 1946[9]; King et al. 1944[10], 1945[11]; Campbell et al. 1989[12]).
Comments
Pachybrachis obsoletus has a broad distribution from Manitoba to Oklahoma and eastwards to the Atlantic Ocean, with Alberta and British Columbia disjunct from this main area (Riley et al. 2003[1]). It is reported here for the first time from NB.
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 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.
- ↑ Pope F (2011) The Alfred Bog. The Ottawa Field-Naturalists’ Club. http://www.ofnc.ca/conservation/alfredbog/index.php [accessed 14 March 2012]
- ↑ NCC ( (2011b) Mer Bleue bog, a special place in the National Capital Greenbelt. http://www.canadascapital.gc.ca/sites/default/files/pubs/NCC-Mer-Bleue-Bog-Special-Place.pdf [accessed 14 March 2012]
- ↑ Wikipedia (2011) Mer Bleue conservation area. http://en.wikipedia.org/wiki/Mer_Bleue_Conservation_Area [accessed 14 March 2012]
- ↑ MDDEP ( (2011) Réserve écologique des Tourbières-de-Lanoraie. http://www.mddep.gouv.qc.ca/biodiversite/reserves/tourbieres_lanoraie/res_48.htm [accessed 14 March 2012]
- ↑ Barney R, Hall S (2011) New host plant records for selected Cryptocephaline leaf beetles (Coleoptera: Chrysomelidae) in Kentucky. The Coleopterists Bulletin 65(1): 15-19. doi: 10.1649/0010-065X-65.1.15
- ↑ Arnason A (1942) Field crops and garden insects: Pachybrachis obsoletus Suffrian. The Canadian Insect Pest Review 20: 209.
- ↑ Arnason A (1943) Field crops and garden insects: Pachybrachis obsoletus Suffrian. The Canadian Insect Pest Review 21: 148.
- ↑ Arnason A, McDonald H, King K, Moore H, Fox W, Riegert P (1946) Insects of the season 1945 in Saskatchewan. The Canadian Insect Pest Review 24: 80-91.
- ↑ King K, Arnason A, Glen R, McDonald H, Paul L, Fox W (1944) Insects of the season 1943 in Saskatchewan - Insects of flowers and ornamentals. The Canadian Insect Pest Review 22: 75-86.
- ↑ King K, Arnason A, Glen R, McDonald H, Fox W, Moore H (1945) Insects of the season 1944 in Saskatchewan - Insects of flowers and ornamentals. The Canadian Insect Pest Review 23: 83-86.
- ↑ Campbell J, Sarazin M, Lyons B (1989) Canadian beetles (Coleoptera) injurious to crops, ornamentals, stored products, and buildings. Research Branch Agriculture Canada, Publication 1826. Ottawa, Ontario, 491 pp.
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