Pachybrachis peccans Suffrian, 1852

Barney, Robert J., LeSage, Laurent & Savard, Karine, 2013, Pachybrachis (Coleoptera, Chrysomelidae, Cryptocephalinae) of Eastern Canada, ZooKeys 332, pp. 95-175 : 125-128

publication ID	https://dx.doi.org/10.3897/zookeys.332.4753
persistent identifier	https://treatment.plazi.org/id/F8E31CF3-CA44-E271-7E86-07B94D2EDA63
treatment provided by	ZooKeys by Pensoft
scientific name	Pachybrachis peccans Suffrian, 1852
status

Treatment

Pachybrachis peccans Suffrian, 1852 Habitus 12 View Habitus 12 ; Map 12 View Map 12 ; Figures 1b View Figure 1 , 2a View Figure 2

Pachybrachis peccans Suffrian, 1852: 192.

Recognition.

Ocular lines prominent ( Figure 2a View Figure 2 ); males with enlarged foreleg claws ( Figures 4a, b View Figure 4 ); color extremely variable, ranging from yellowish with faint black spots to almost black speckled with small yellow marks ( Habitus 12 View Habitus 12 ); male size small: length 2.15 ± 0.16 mm, width 1.13 ± 0.09 mm.

Distribution.

Transcontinental species, widely distributed from Texas to Yukon to Atlantic Coast ( LeSage 1991; Riley et al. 2003). Found in eastern Canada from Ontario to Prince Edward Island ( Map 12 View Map 12 ).

Material examined.

NEW BRUNSWICK: Kent Co., Kouchibouguac National Park, 5-6.VII.1977, M. Ivanochko [40♂ 28♀, CNC]; same data, except 5-19.VII.1977, S. J. Miller [2♂ 7♀, CNC]; same data, except 8-13.VIII.1977 [2♂ 1♀, CNC]; same data, except 27.VII.1977, G. A. Calderwood [1♀, CNC]; same data, except 4.VIII.1977 [1♂ 1♀, CNC]; same data, except 16.VI.1978, D. B. Lyons [1♂, CNC]; Kings Co., Mechanic’s Lake, 30.VII.1926 [1♂, CNC]; Penobsquis, 21-31.VII.1926, C. A. Frost [1♂ 2♀, CNC]; Queens Co., Canning Grand Lake near Flowers Cove, 1.VII.2004, D. Sabine and R. Webster [1♂, RWIC]; Saint John Co., St. John, 8.VII.1902, W. McIntosch [1♀, USNM]; same data, except 19.VI.1981, sweeping vegetation, D. R. Ward [1♂ 1♀, CNC]; York Co., New Maryland Charters Settlement, 27.VI.2004, R. P. Webster [1♂, RWIC].

NOVA SCOTIA: Annapolis Co., Annapolis Royal, 21.VII.1928, W. J. Brown [1♂ 1♀, CNC]; Inverness Co., Cape Breton Highlands National Park, Grande Falaise, 30 m, 0.5 km north, 9.VI.1983, forest, flood plain, H. Goulet [1♂, CNC]; Kings Co., Kentville, 20.VI.1981, sweeping, D. Ward [1♀, CNC]; Queens Co., Greenfield Queens, 13.VI.1910, P. G. Bolster [1♀, MCZ]; Port Medway & vic. Queen, 7-20.VII.1910 [2♂ 2♀, MCZ].

ONTARIO: Algoma Dist., Lake Superior Provincial Park, Agawa Bay Campground, 8.VII.1970, ROM Field Party [1♂ 2♀, ROM]; Carleton Co., Britannia, 14.VI.1949, R. de Ruette [1♂, CNC]; Britannia Bay, 3.VI.1959, S. D. Hicks [2♂ 1♀, CNC]; Britannia Heights, 16.VII.1958, S. D. Hicks [1♀, CNC]; same data, except 7.VII.1961, ex. Populus balsamifera [17♂ 12♀, CNC]; Constance Bay, 30.VIII.1982, L. J. Milne [1♀, CNC]; Ottawa, 14.VI.1972, F. G. Ouellet [1♀, IDM]; Cochrane Dist., Smoky Falls, Mattagami River, 6.VII.1934, G. S. Walley [1♂, CNC]; Timmins, 16.VI.1982, on plants in gravel, J. Pilny [1♀, CNC]; same data, except Mattagami River, 48°30'N, 81°15'W, 16.VI.1982, Pilny & Motz [2♀, CNC]; Essex Co., Belle River, 26.V.1946, S. D. Hicks [1♀, CNC]; Leamington, 4.VI.1937, G. S. Walley [1♂ 3♀, CNC]; Ojibway, 9.VI.1943, S. D. Hicks [2♂ 2♀, CNC]; same data, except 28.V.1944 [1♂ 1♀, CNC]; Pelee Island, VI.24, R. C. Osburn [1♂, OSU]; same data, except 3.VII.1931, W. J. Brown [2♀, CNC]; same data, except 11.VI.1940, ex. Salix [6♂ 4♀, CNC]; Point Pelee, 23-29.VI.1931, W. J. Brown [18♂ 18♀, CNC]; same data, except 3.VII.1931 [1♂ 1♀, CNC]; same data, except 29.V.1940 [3♂ 2♀, CNC]; same data, except 1.VII.1940 [1♂ 2♀, CNC]; same data, except 3.VI.1929, L. J. Milne [5♂ 5♀, CNC]; same data, except 1.VI.1933, ex. willow, G. M. Stirrett [2♂ 4♀, 6, CNC]; same data, except 19-20.V.1955, ex. Salix interior , S. D. Hicks [2♂ 8♀, CNC]; same data, except 30.V.1929, G. S. Walley [3♂ 3♀, CNC]; same data, except 25.VI.1920, N. K. Bigelow [1♂ 1♀, ROM]; Point Pelee National Park, 6.VI.1981, ex. Salix spp., L. LeSage & D. Ward [1♂, CNC]; same data, except 29.VII.1982, L. LeSage [1♂ 1♀, CNC]; Haldimand Co., Dunville, 30.V.1954, R. Plath [1♂ 1♀, USNM]; Hastings Co., Marmora, 1.VII.1952, sweep from Rubus spp., G. P. Holland [1♀, CNC]; Kenora Dist., Malachi, 13-14.VII.1947, W. Y. Watson [1♂ 1♀, ROM]; Willard Lake, 22.VI.1992, lot 1, B.F. & J.L. Carr [1♂, CNC]; Kent Co., Erieau, 26.VI.1932, ex. Cornus sp., G. M. Stirrett [5♂ 4♀, CNC]; Rondeau Park, 3.VI.1981, L. LeSage [3♂ 11♀, CNC]; same data, except 4.VI.1981, ex. Salix spp. [2♀, CNC]; same data, except 29.V.1985, marsh trail [2♂ 3♀, CNC]; same data, except 28.V.1985, sandy beach [1♀, CNC]; same data, except 7.VI.1981, sifted litter under willows, L. LeSage & D. Ward [4♂ 7♀, CNC]; same data, except 3.VI.1981, sweep willow and grasses, D. Ward [1♂, CNC]; same data, except 5.VI.1985, under willow, J. M. Campbell & A. Davies [1♂, CNC]; Lanark Co., Bell’s Corner, 30.VI.1950, S. D. Hicks [1♀, CNC]; Niagara Co., Ridgeway, A. H. Kilman [1♀, ROM]; Nipissing Dist., Algonquin Park, 18.VI.1922, J. McDunnough [2♀, CNC]; same data, except 4.VII.1965, W. F. O. [1♀, CNC]; North Bay, 11.VII.1972, E. J. Kiteley [1♀, CNC]; North Bay, Trout Creek, 25.VI.1984, willow [1♀, CNC]; Norfolk Co., Hemlock, 9.VIII.1945, ex. Salix , G. M. Stirrett [1♂ 1♀, CNC]; Turkey Point, 8.VI.1931, W. J. Brown [2♂ 1♀, CNC]; same data, except 24.VII.1984, sweeping in marshy area, L. LeSage [5♂ 1♀, CNC]; Walsingham Forestry Station, 25.VII.1984, sweeping in ditch, L. LeSage [1♂ 3♀, CNC]; Parry Sound Dist., Burk’s Falls, 14.VII.1926, F. P. Ide [1♀, CNC]; Scotia Junction, 28.VIII.1934, H. W. Wenzel [1♂, OSU]; Peel Co., Port Credit, 4.VII.1908 [1♂, ROM]; Peterborough Co., Hastings, 2.VI.1934, J. F. Brimley [2♀, CNC]; same data, except 31.VI.1934 [1♀, CNC]; same data, except 9.VI.1935 [1♀, CNC]; same data, except 4.VI.1950 [1♀, CNC]; same data, except 5.IX.1956 [2♀, CNC]; Prince Edward Co., same data, except 9-13.VII.1941 [1♀, CNC]; same data, except 24.VII.1945 [1♀, CNC]; Prince Edward Co., Picton, 22.VI.1985, M. Davis [1♀, CNC]; Rainy River Dist., 13-15.VII.1924, J. F. Brimley [2♀, CNC]; same data, except 24.VIII.1924 [1♀, CNC]; Renfrew Co., Petawawa, 17.VI.1980, ex. Comptonia peregrina , L. LeSage [1♀, CNC]; Sudbury Dist., Sudbury 1988 [1♂ 1♀, CNC]; same data, except Wickham [1♀, USNM]; Thunder Bay Dist., Black Sturgeon Lake, 1-15.VIII.1956, Lindberg [7♂ 24♀, CNC]; Manitouwadge, 22.VII.1983, T. Baker [2♀, CNC]; same data, except 7.VII.1991, on weeds near woodpile pine logs, [1♂, CNC]; same data, except 21.VI.1992 [1♀, CNC]; 59 km north of junction of highway 516 & 599, 24.VI.1992, lot 2, B.F. & J.L. Carr [1♀, CNC]; Timiskaming Dist., Elk Lake, 30.VI.1958, G. H. Dieke [1♂, USNM]; Toronto Co., Toronto, F. Knab [10♂ 6♀, USNM]; same data, except 2.VII.1894, [1♀, ROM]; same data, except VII.1933 [2♂ 2♀, ROM]; same data, except 30.V.1896, H. R. [1♂ 1♀, LEM]; same data, except 26.VI.1896, C. T. Hills [1♀, LEM]; same data, except 20.VI.1908, R. J. Crew [1♀, ROM]; same data, except 8.VI.1926, E. C. Oakley [1♂ 2♀, LEM]; same data, except VII.1933, L. J. Milne [2♀, UNHC]; Victoria Co., Fenelon Falls, Lindsay, 17.VI.1959, ex. Salix sp., F.I.S. [1♂, CNC]; Unknown Co., Sultan road, 68 km west of junction of highway 144, 26.VI.1996, Lot 2, B.F. & J.L. Carr [1♂ 2♀, CNC].

PRINCE EDWARD ISLAND: Kings Co., Souris, 12.VII.1993, ex. lowbush blueberry, M. E. M. Smith [2♂ 1♀, CNC]; Queens Co., PEI National Park Stanhope Campground, 13.VIII.1991, D. S. Chandler [2♂, UNHC].

QUÉBEC: Abitibi Co., Saint-Vital-de-Clermont, 9.VIII.1983, sweeping weeds in Pinus banksiana Lamb. forest, A. Larochelle [1♂, CNC]; Argenteuil Co., Saint-Philippe-d’Argenteuil, 21.VI.1983, ex. Betula populifolia Marsh., Larochelle [1♂, CNC]; Arthabaska Co., Blandford, 21.VI.1980, ex. Salix sp., A. Larochelle [1♀, CNC]; Bellechasse Co., Saint-Étienne, 1.VI.1980, J. C. Aubé [3♂ 2♀, LEM]; Berthier Co., Berthierville, 4.VI.1944, A. Robert [1♀, CEUM]; Bonaventure Co., Carleton, 29.VII.1981, waste land on weeds, A. Larochelle [1♂, CNC]; Cascapédia, 11-14.VI.1933, W. J. Brown [7♂ 12♀, CNC]; Port-Daniel, 30.VII.1981, field on weeds, A. Larochelle [1♂, CNC]; Brome Co., Knowlton, 10-12.VII.1928, G. H. Fish [2♂ 1♀, CNC]; Champlain Co., La Tuque. 8.VIII.1981, ex. Myrica asplenifolia L., A. Larochelle [1♀, CNC]; Chicoutimi Co., Jonquière, 27.VI.1970, ex. Populus tremuloides , C. Chantz [1♂, AJGC]; Deux-Montagnes Co., La Trappe, 25.V.1929, P. Leopold [1♀, CEUM]; same data, except 27.VI.1933, J. Ouellet [3♂ 1♀, Det. by H. C. Fall, CEUM]; same data, except 2.VII.1933 [2♂ 1♀, CEUM]; same data, except 28.VI.1935 [14♂ 19♀, CEUM]; same data, except 23.VII.1950 [2♂ 2♀, CEUM]; Saint-Placide, 4.VI.1933 [1♀, CEUM]; Gaspé-Est Co., Gaspé, 7.VII.1931 [1♂, Fall-MCZ]; same data, except 25.VII.1954, W. J. Brown [1♂ 2♀, CNC]; Percé, 30.VII.1981, roadside, on weeds, A. Larochelle [1♀, CNC]; Val-d’Espoir, 18.VIII.1939, J. Ouellet [1♀, CEUM]; Gatineau Co., Lytton, 1.VII.1981, ex. Salix sp., A. Larochelle [1♀, CNC]; Île-de- Montréal Co., Montréal, 28.VI, J. Ouellet [1♀, CEUM]; same data, except 2.VII.1917 [1♂, CEUM]; same data, except 30.V.1940, A. Robert [2♂ 3♀, CEUM]; same data, except 15.VI.1951, M. Larochelle [1♀, CEUM]; same data, except 17.VI.1980, E. J. Kiteley [1♀, CNC]; same data, except 30.V.1981 [1♂, CNC]; Joliette Co., Joliette, 15.VII.1924 [1♂, Fall- MCZ]; same data, except, 15.VII.1917, J. Ouellet [3♀, CEUM]; same data, except 7-13.VII.1922 [2♂ 2♀, CEUM]; same data, except 7-15.VII.1924 [15♂ 5♀, CEUM]; same data, except 12.VI.1930 [1♂, CEUM]; Kamouraska Co., Sully, 24-26.VI.1936, J. Ouellet [33♂ 45♀, CEUM]; same data, except 1-2.VII.1936 [17♂ 26♀, CEUM]; same data, except 9.VII.1936 [25♂ 24♀, CEUM]; same data, except 13-14.VII.1936 [18♂ 22♀, CEUM]; same data, except 21.VII.1936 [2♂ 4♀, CEUM]; Labelle Co., Lac Saguay, 19.VI.1981, ex. Salix sp., A. Larochelle [1♀, CNC]; Nominingue, 25.VIII.1930, J. Ouellet [1♀, CEUM]; same data, except 12-24.VII.1932 [22♂ 37♀, CEUM]; same data, except 24.VII.1933, A. Robert [1♂ 2♀, CEUM]; same data, except 19.VI.1934, L. Daviault [1♂, CEUM]; same data, except 21.VII.1932 [1♀, Fall- MCZ]; Lévis Co., Lauzon, 29.VI.1932, J. Ouellet [1♀, CEUM]; Montcalm Co., Parc du Mont-Tremblant, 15.VIII.1954, A. Robert [1♂ 1♀, CEUM]; same data, except 27.VI.1971, E. J. Kiteley [1♂, CNC]; Nicolet Co., Blandford, 21.VI.1980, A. Larochelle [1♀, CNC]; Papineau Co., Montebello, 3.VII.1937, J. Ouellet [1♀, CEUM]; Portneuf Co., Lac Sergent, 2.VII.1961, J. L. Laliberté [1♀, IDM]; Saint-Augustin, 17.VI.1967, J. L. Laliberté [1♂, IDM]; same data, except 22.VI.1977 [1♂, IDM]; Sainte-Catherine, 8-14.VII.1956, J. C. Aubé [7♂ 4♀, LEM; 2♂ 2♀, AMNH, 1♂, USNM]; same data, except 19.VI.1957 [1♂, LEM]; same data, except 11.VI.1960 [1♀, LEM]; same data, except 9-15.VII.1960 [1♂ 1♀, LEM; 1♀, USNM]; same data, except 26.VII.1961 [2♀, LEM]; same data, except 5.VIII.1961 [1♀, LEM]; same data, except 15.VII.1956, J. L. Laliberté [1♂ 2♀, IDM]; Québec Co., Cap-Rouge, 27.VI.1959, J. C. Aubé [1♂, LEM]; same data, except 24.VI.1981, D. R. Ward [1♀, CNC]; Lac Beauport, 11-23.VII.1956, J. L. Laliberté [1♂ 2♀, IDM]; Québec, 15.VI.1957, J. C. Aubé [1♂, LEM; 1♂, AMNH]; Saguenay Co., Grandes- Bergeronnes, 20.VII.1981, field on weeds, A. Larochelle [1♀, CNC]; Rivière Barthélemy, 22.VII.1981, field on weeds, A. Larochelle [1♂, CNC]; Tadoussac, 23.VII.1932, A. F. Winn [3♀, CEUM]; Saint-Jean Co., Saint-Jean-sur-Richelieu (as "St. Johns"), F. Knab [1♂, USNM]; Saint-Maurice Co., Pointe-du-Lac, 11.VII.1926, J. L. Laliberté [1♀, IDM]; same data, except 5.VIII.1927 [1♂ 1♀, IDM]; same data, except 26.VII.1928 J. L. Laliberté [1♀, IDM]; same data, except 20.VII.1936 [2♀, IDM]; Soulanges Co., Rivière-Beaudette, 10.VIII.1985, Larochelle & Larivière [1♀, CNC]; Témiscamingue Co. Laniel, 5-6.VI.1963, W. Gagné [1♂, CNC]; Notre- Dame-du-Nord, 36.VI [2♂, CEUM]; Vaudreuil Co., Rigaud, 13.VII.1973, sweeping Salix sp., E. J. Kiteley [3♂ 3♀, CNC]; same data, except 7.VI.1985, willow in flower ( Salix sp.), Larochelle & Larivière [1♂, CNC]; same data, except 7.VI.1985, old field birch ( Betula populifolia Marsh.), Larochelle & Larivière [1 ♀, CNC]; Saint-Lazare, 20.VI.1983, ex. Salix fragilis L., A. Larochelle [1♀, CNC]; Mont Lyall 1500 ft, 31.VII.1933, W. J. Brown [2♂ 4♀, CNC].

Host plants.

Large series of Pachybrachis peccans were reportedly taken on Populus balsami-fera L. and Salix spp. ( Salicaceae ). Other plant associations recorded on labels were Populus tremuloides Michx.; lowbush blueberry ( Vaccinium angustifolium Ait.) ( Ericaceae ); Rubus spp. ( Rosaceae ); and Comptonia peregrina (L.) ( Myricaceae ). Larvae were reared on dead leaves of sand-bar willow ( Salix interior Rowlee) by LeSage (1985). Larochelle specimens from Québec had a wide range of potential plant associations. Several additional potential hosts are listed by Clark et al. (2004) from their literature review.

Comments.

Pachybrachis peccans was the most commonly examined species (over 900 specimens; Table 1 View Table 1 ). It has also the largest distribution, being found from Nova Scotia to Yukon ( Map 12 View Map 12 ). Pachybrachis peccans is reported here for the first time from PE.

As one of several species in North America having distinct ocular lines, enlarged claws, and varying degrees of maculation, there is much potential confusion with other species. Fall (1915) stated, "While Pachybrachis peccans varies toward Pachybrachis melanostictus in its darker individuals, it approaches so closely to Pachybrachis diversus and Pachybrachis abdominalis in some of its paler forms as to make distinction purely discretional." At this time, we believe Pachybrachis diversus is a more southern species not found in Canada, and Pachybrachis abdominalis and Pachybrachis melanostictus are not found in eastern Canada.