Pachybrachis (Pachybrachis) tridens (Melsheimer, 1847)

Webster, Reginald P., Webster, Vincent L., Alderson, Chantelle A., Hughes, Cory C. & Sweeney, Jon D., 2016, Further contributions to the Coleoptera fauna of New Brunswick with an addition to the fauna of Nova Scotia, Canada, ZooKeys 573, pp. 265-338 : 327

Pachybrachis (Pachybrachis) tridens (Melsheimer, 1847)

Material examined.

New Brunswick, York Co. Keswick Ridge, 45.9962°N, 66.8781°W, 16-29.VII.2015, C. Alderson & V. Webster // Mixed forest , Lindgren funnel trap in canopy (1, RWC) .

Distribution in Canada and Alaska.

MB, ON, QC, NB ( Bousquet et al. 2013).

Comments.

Poison ivy, Toxicodendron radicans (L.) Kuntze, has been reported as the preferred host for this species (see Clark et al. (2004) for a complete list of references). This vine was common at the site where the NB specimen was collected. Pachybrachis tridens was thought to be restricted to the Carolinian Life Zone in Canada, and records from MB and QC were considered questionable by Barney et al. (2013). This distinctive species has not been collected in Canada since 1950 and was considered to be extirpated from Canada by Barney et al. (2013). The record from NB indicates that the species is still present in Canada.