Atomaria wollastoni Sharp 1867

Atomaria wollastoni Sharp, 1867

LABRADOR: Middle Brook, June 17-July 4, 2005, July 18–2 August, 2005, August 24-September 12, 2005, S. Pardy, boreal forest, pitfall (3, MUN); Muskrat Falls, June 2–17, 2005, S. Pardy, boreal forest, pitfall (1, MUN); Ossak Camp, June 28-July 11, 2004, August 11–29, 2004, September 22-October 8, 2004, S. Pardy, subarctic black forest, pitfall (19, MUN); St. Lewis, August 25-September 7, 2004, S. Pardy, heath, pitfall (1, MUN). NEWFOUNDLAND: Picadilly, July 7, 1949, E. Palmen

Atomaria ephippiata Atomaria fuscata Atomaria nigrirostris Atomaria wollastoni Labrador

Figure Ι7. Distribution of Atomaria ephippiata, Atomaria fuscata, Atomaria nigrirostris, and Atomaria wollastoni in Labrador.

(1, MZHF); Cape Broyle, June 8, 1949, E. Palmen (1, MZHF); South Branch, July 3, 1949, E. Palmen (1, MZHF); Corner Brook, Cooks Pond Lower, June 24-July 15, 1992, 40 year old fir forest (3, MUN); Conception Bay, May 18, 1980 (1, MUN); Manuals R., 8 km W of St. John’s, June 10, 1984, D. Langor (1, MUN); Portugal Cove: Indian Meal Line, May 16, 1979, June 2, 1979, July 1, 1979, October 20, 1980, May 28, 1981, June 22, 1981, July 19, 1981, September 1, 1981, July 21, 1982 (28, MUN); St John’s, Oxen Pond Botanical Garden, September 5, 2000, D. Larson (1, MUN); Gander, T.H. Howe Forest, July-August, 1998, D. Russell, wind drift (1, MUN); Red Indian Lake, June 25, 1980, Brennan & Larson, drift (1, MUN); South Pond near South Brook, June 27, 1980, Brennan & Larson (4, MUN); Little Grand Lake, Bakeapple Brook, June 24-July 15, 1992, old fir, pitfall (3, MUN); Glide Lake, July 5, 1994, W. Bowers et al. (1, MUN); Glide Lake, June 20, 1996, pitfall (2, CFS); Glide Lake, July 19, 1996, August 22, 1996, pitfall (2, MUN); Glide Lake, August 30, 1994, pitfall (1, CFS); Pasadena, May 16, 1988, L.H. Hollett (2, MUN). NOVA SCOTIA: Annapolis Co.: Durland Lake, June 6, 2003, P. Dollin, eastern hemlock/ balsam fir/black spruce (120+ years), under bark of log (1, NSMC); Cumberland Co.: Wentworth Park, July 12, 1993, J. & T. Cook, car net (1, JCC); Halifax Co.: Halifax, May 26, 2009, S. MacIvor, open area (1, SMU); Big Indian Lake, June 11, 2003, P. Dollin, red spruce (80–120 years), red spruce stump (2, NSMC); Queens Co.: Fifth Lake Bay, July 13, 2003, P. Dollin, hemlock (120+ years), pitfall (1, NSMC); Medway River, July 13, 1993, J. & T. Cook, car net (5, JCC); Sixth Lake, June 20, 2003, P. Dollin, eastern hemlock (120+ years), funnel trap (1, NSMC); Yarmouth Co.: Carleton: Perry Rd., July 18, 1993, J. & T. Cook, car net (1, JCC).

Atomaria wollastoni is newly recorded in Labrador, insular Newfoundland, and Nova Scotia (Fig. 13, 17). Dollin et al.’s (2008) records of A. ochracea are attributable to A. wollastoni. Leng (1920) reported it from “ Canada.” In Europe this species has a northern distribution having been recorded in central and northern Russia, Scandinavia, Estonia in the Baltic region, Great Britain, Ireland, the Netherlands, Germany, and France (Johnson et al. 2007). In Atlantic Canada it has been found in coniferous forests consisting of eastern hemlock, balsam fir, red spruce, and black spruce (Picea mariana (Mill.) BSP., Pinaceae). In Europe, Schiegg (2000) classed it as a stenotopic saproxylic species characteristic of high dead wood connectivity, and noted that it is red-listed in Germany. It is also red-listed in Denmark (Stolze and Pihl 1997). In Norway, Hågvar (1999) found it associated with sporocarps of Fomitopsis pinicola (Fr.) Karst. (Polyporaceae). It would appear to be a characteristic saproxylic species in both Europe and North America.

Description: Head and pronotum blackish-piceous; elytra, antennae, and legs testaceous. Venter piceous. Head, pronotum, and elytra moderately densely, moderately strongly punctate; interspaces 1.0–1.5 times the diameter of punctures; apex of elytra slightly more finely punctate. Elytral setae approximately the length of the interspaces, appressed. Pronotum widest at approximately the middle, evenly arcuately constricted to apex and base, hind angles rounded; base of pronotum without transverse impression (Fig. 11). Antennae: antennomere 1 long and curved, twice as long as 2 and approximately twice as wide at apex than at base; 3, 5 and 7 shorter and more slender; 4, 6, and 8 short and bead-like; club moderately distinct; antennomeres 9 and 10 quadrate (Fig. 1.10). Body: width/length ratio, 0.33; length, 1.5–1.8 mm.