Rhizophagus dimidiatus Mannerheim, 1843

Webster, Reginald P., Sweeney, Jon D. & DeMerchant, Ian, 2012, New Coleoptera records from New Brunswick, Canada: Sphindidae, Erotylidae, Monotomidae, and Cryptophagidae, ZooKeys 179, pp. 169-192 : 178-179

Rhizophagus dimidiatus Mannerheim, 1843 Map 9

Material examined.

Additional New Brunswick records. Carleton Co., Jackson Falls, Bell Forest, 46.2200°N, 67.7231°W, 6.V.2007, 7.VI.2007, R. P. Webster, mature hardwood forest, on fleshy polypore (bracket) fungi on dead standing beech (2, RWC); same locality but 4-12.VI.2008, 12-19.VI.2008, 27.VI-5.VII.2008, R. P. Webster, mature hardwood forest, Lindgren funnel traps (8, AFC, RWC); same locality and habitat data but 20-26.V.2009, 1-8.VI.2009, 16-21.VI.2009, 21-28.VI.2009, Webster & M.-A. Giguère, Lindgren funnel traps (4, AFC, RWC). Queens Co., Cranberry Lake P.N.A, 46.1125°N, 65.6075°W, 5-11.VI.2009, 11-18.VI.2009, 18-25.VI.2009, 25.VI-1.VII.2009, R. Webster & M.-A. Giguère, old red oak forest, Lindgren funnel traps (11, AFC). Restigouche Co., Dionne Brook P.N.A., 47.9030°N, 68.3503°W, 30.V-15.VI.2011, M. Roy & V. Webster, old-growth northern hardwood forest, Lindgren funnel traps (2, AFC, NBM); same locality and collectors but 47.9064°N, 68.3441°W, 31.V-15.VI.2011, 27.VI-14.VII.2011, old-growth white spruce and balsam fir forest, Lindgren funnel traps (2, AFC, NBM). Sunbury Co., Acadia Research Forest, 45.9866°N, 66.3841°W, 2-9.VI.2009, 24-30.VI.2009, R. Webster & M.-A. Giguère, mature (110-year-old) red spruce forest with scattered red maple and balsam fir, Lindgren funnel traps (2, AFC). York Co., Charters Settlement, 45.8286°N, 66.7365°W, 6.VI.2007, R. P. Webster, mature red spruce and red maple forest, under scolytid infested bark of red spruce (2, RWC); 15 km W of Tracy off Rt. 645, 45.6848°N, 66.8821°W, 8-15.VI.2009, 15-21.VI.2009, 20-29.VII.2009, R. Webster & M.-A. Giguère, old red pine forest, Lindgren funnel traps (4, AFC); 14 km WSW of Tracy, S of Rt. 645, 45.6741°N, 66.8661°W, 10-26.V.2010, R. Webster & C. MacKay, old mixed forest with red and white spruce, red and white pine, balsam fir, eastern white cedar, red maple, and Populus sp., Lindgren funnel trap (1, AFC).

Collection and habitat data.

Most adults from New Brunswick were captured in Lindgren funnel traps. This species occurred in various forest types, including mature hardwood forests, an old-growth northern hardwood forest, an old red oak forest, old mixed forests, an old red pine forest, and an old-growth white spruce and balsam fir forest. Specimens with specific habitat data were collected from under scolytine-infested bark of red spruce and on fleshy polypore (bracket) fungi on dead standing American beech trees. Bousquet (1990) reported this species from under bark of deciduous ( Acer sp., Betula sp., Fagus sp.) and coniferous ( Pinus sp., Larix sp., Picea sp.) trees in eastern North America. Adults were collected during May, June, and July in New Brunswick.

Distribution in Canada and Alaska.

AK, YK, BC, AB, ON, QC, NB, NS, NF ( Bousquet 1990; Majka and Bousquet 2010). Rhizophagus dimidiatus was first reported from New Brunswick by Majka and Bousquet (2010) on the basis of one specimen from Chatham, Northumberland Co., collected by P. Kaanar (in CNC). This species is widespread and common in New Brunswick.

Figures

Map 9. Collection localities in New Brunswick, Canada of Rhizophagus dimidiatus.