Atomaria distincta Casey, 1900

Majka, Christopher, Johnson, Colin & Langor, David, 2010, Contributions towards an understanding of the Atomariinae (Coleoptera, Cryptophagidae) of Atlantic Canada, ZooKeys 35 (35), pp. 37-63 : 46

Atomaria distincta Casey, 1900

NEW BRUNSWICK: Westmorland Co.: Moncton, July 6, 1972, D.H. Murray (1, MMUE). NOVA SCOTIA: Halifax Co.: West Dover, September 7, 2003, C.G. Majka, salt marsh (4, CGMC).

Atomaria distincta is newly recorded in New Brunswick, Nova Scotia, and Canada (Fig. 14). This Nearctic species has previously been reported from the District of Columbia, Massachusetts, New York, and Québec ( Leng 1920; Downie and Arnett 1996).

Description: Head piceous, finely sparsely punctate. Pronotum piceous, finely sparsely punctate; pronotum widest at or slightly ahead of midpoint, not appreciably flattened across base; finely sparsely punctate; interspaces between punctures 1.5–2.0 times the diameter of punctures. Scutellum black. Basal 3/5 of elytra black, becoming abruptly yellow in apical 2/5, the yellow portion extending slightly anterad in the region of the suture. Punctation very fine and sparse; interspaces between punctures 2.0–3.0 times the diameter of punctures; elytral setae very fine and short, shorter than interspace intervals and appressed. Legs, prosternum, and abdominal sterna reddishtestacous; sterna darker basally and laterally (Fig. 3). Antennae: antenomere 1 short, almost quadrate, not longer than 2; 2 slightly shorter than 1 and slightly narrower; 3 as long as 2 and slightly more slender; 4, 5 and 7 slightly shorter than 3; 6 and 8 still shorter, each approximately 1/2 the length of 3, not bead-like; antennal club distinct, antennomeres 9 and 10 almost quadrate, not noticibly transverse (Fig. 1.2). Body: width/length ratio, 0.43; length, 1.4–1.5 mm.