Dinaraea angustula (Gyllenhal)

Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Caroline Bourdon, & Jacobs, Jenna, 2013, Review of Canadian species of the genus Dinaraea Thomson, with descriptions of six new species (Coleoptera, Staphylinidae, Aleocharinae, Athetini), ZooKeys 327, pp. 65-101 : 80-82

6. Dinaraea angustula (Gyllenhal) Fig. 6 a–g, Map 5

Aleochara angustula Gyllenhal, 1810: 393; as Dinaraea : Klimaszewski et al. 2011: 159.

Diagnosis.

Dinaraea angustula (habitus Fig. 6a) may be distinguished from congeners by the following combination of characters: body length 3.3-3.7 mm; head, pronotum and elytra slightly glossy with dense microsculpture; pronotum broadest at middle and narrowest at apex and base; elytra at suture as long as or slightly shorter than pronotum, with dense punctation similar to that on pronotum; antennal articles 7-10 moderately transverse; male tergite VIII with four small apical teeth, all short and rounded and some additional tooth-like subapical structures (Fig. 6c); median lobe of aedeagus with straight and short tubus narrowly rounded apically and sometimes slightly hooked at apex (Fig. 6b); spermatheca with short pear-shaped capsule, and small apical invagination, stem long, straight medially and looped posteriorly, with slightly swollen apical part (Fig. 6e).

Description.

Body length 3.3-3.7 mm; body dark brown with legs, antennae (at least basally), labial palpi and elytra yellowish- or reddish-brown, pronotum and abdomen lighter than head, sometimes entire body appears brown; head, pronotum and elytra slightly glossy, with dense microsculpture; abdominal microsculpture less dense and integument more glossy than that of pronotum and elytra; head about as broad as pronotum, genae slightly longer than eyes in dorsal view; pronotum broadest at middle, slightly transverse, usually longer than elytra at suture; elytra transverse, truncate posteriorly; abdomen subparallel; male tergite VIII with four small apical teeth, all short and rounded and some additional tooth-like subapical structures (Fig. 6c), sternite VIII produced apically (Fig. 6d); median lobe of aedeagus with short and straight venter of tubus and narrowly ventrally pointed apex (Fig. 6b); female tergite VIII concave basally and truncate apically (Fig. 6f), sternite VIII rounded apically and emarginated medially, antecostal suture slightly sinuate (Fig. 6g); spermatheca with short pear-shaped capsule, and small apical invagination, stem long, straight medially and looped posteriorly, with slightly swollen apical part (Fig. 6e).

Distribution.

This Palaearctic species is adventive in North America ( Klimaszewski et al. 2010). The earliest Canadian records are: Elora, Ontario in 1975 (DEBU); St. Andrews, New Brunswick in 1978 (DEBU); Fairview, Alberta in 1982 (DEBU). The first North American records are: Buffalo and New York before 1889 ( Fauvel 1889); Davis, California before 1984 ( Muona 1984). In Canada, the species is known from Newfoundland and Labrador, Nova Scotia, Prince Edward Island, New Brunswick, Quebec, Ontario, Alberta and Yukon Territory ( Klimaszewski et al. 2007, 2010, 2011, 2012, Majka and Klimaszewski 2008, Webster et al. 2009). In the USA, it is reported from New York, Pennsylvania and California, but is likely more widely distributed in the northeastern states.

Collection and habitat data.

In North America, this species is associated with soil and organic debris in agricultural fields and disturbed urban meadows. It is also found in marsh litter, in leaf litter in mixed forests, in compost, under bark of decaying spruce logs, amongst vegetation on a coastal sand dune, in litter in a cattail marsh, in leaf litter along a vernal pond, and in drift material along a lakeshore ( Webster at al. 2009, Klimaszewski et al. 2010, 2011, 2012). Illustrations and a description of the larva were published in Topp (1975).

Material examined.

CANADA, NOVA SCOTIA: Kings County, Sheffield Mills, July 22, 2002, Pitfall trap, Ken Neal (LFC) 1 male; Hants Co., Upper Rawdon, VII.18, 2008, J. Renkema, highbush blueberry field R2T1E (LFC) 1 male; Cape Breton Highlands National Park, Lone Shielding, PG729861, 28.VI.1983, R. Vockeroth, Malaise (CNC) 1 sex?; Bible Hill, 45.376°N, 63.260°W, 2005 (CNC) 1 sex?; Sheffield Mills, 45.151°N, 64.477°W, 1998 (NSM) 1 sex?; Sydney Tar Ponds, 46.150°N, 60.167°W, 1996 (NSM) 1 sex?; Upper Rawdon, 45.068°N, 63.712°W, 2005 (NSM) 1 sex? NEW BRUNSWICK: Albert Co., Shepody NWA, Germantown Section, 45.7056°N, 64.7642°W, 2004 (NBM) 1 female; Carleton Co., Wakefield (Belleville), Meduxnekeag Valley Nature Preserve, 46.1965°N, 67.6340°W, 11.V.2005, M.-A. Giguère & R. Webster // Mixed forest, margin of vernal pond in leaf litter (RWC) 1 female; Charlotte Co., St. Andrews, 45.067°N, 67.033°W, 1978 (DEBU) 1 sex?; Kent Co., N.P., Kouchibouguac, 24.V.1977, S.J. Miller, Code 51370 (CNC) 2 females; Queens Co., Canning, Grand Lake near Scotchtown, 45.8762°N, 66.1816°W, 30.IV.2006, R.P. Webster // Lake margin, in drift material (RWC) 1 female; York Co. New Maryland, Charters Settlement, 45.8395°N, 66.7391°W, 22.VII.2006, 17.IX.2006, 5.IX.2007, 23.IV.2008, 19.IX.2010, R.P. Webster // Mixed forest, in pile of decaying (mouldy) corncobs and corn husks (RWC) 2 males, 3 females. NEWFOUNDLAND and LABRADOR: Red Bay, 51.734°N, 56.426°W, 2009 (MUN) 1 sex?; Shalloway, 49.409°N, 53.869°W, 2001 (MUN) 1 sex?; St. John’s, Agriculture Canada Research Centre, 47.516°N, 52.785°W, 1982 (AAFC-SJ) 1 sex? PRINCE EDWARD ISLAND: Harrington, 46.350°N, 63.168°W, 1996 (ACPE) 1 sex? QUEBEC: Cookshire, Co. Compton, SAB, Lum. 1, 13-V-1996 // 96-3-0218, Downey R., Plantation (LFC) 1 sex?; same data except: Lum. 4, 23-V-1996 / 96-3-0277 (LFC) 1 sex?; Lum. 2, 3-VI-1999 / 96-3-0242 (LFC) 1 female; Lum. 5, 8-VII-1996 // 96-3-0308 (LFC) 1 sex?; 45.420°N, 71.630°W (lit) (LFC) 1 sex?; Dorval, 11-IV-1985, in deciduous forest, LeSage & Smetana (CNC) 1 male; Montreal, VII-22-1969 & VII-30-1972, E.J. Kiteley (CNC) 2 sex?; Portneuf Co., Deschambault, 30.III.2007, Coll. Michel Racine // Sous rocher et débris, talus boisé déneigé, en bordure carrière (LFC) 1 female; Réserve Portneuf, Lac Poissonneux, 47.049°N, 72.125°W, 2000 (LFC) 1 sex?; 47.050°N, 72.120°W, 2000 (LFC) 1 sex?; ZEC B-Nelson, Lac-des-Étangs, 46.963°N, 72.050°W, 2000 (LFC) 2 sex?; Co. Charlevoix, Rte. 381, 47°42'N, 70°44'W, 13-21.VI.2000, Grands-Jardins 2000 / Coupe 53 (CP53), Lumi noc, piège-fosse, Pessière noire, brulée, Coupe 50 ans, 2000-3-0053 (LFC) 1 female; Québec Co., Charlesbourg, 8.X.2007, Coll. Michel Racine // Sous debris végétaux en bordure plate-bande de fleurs cultivées (LFC) 1 female; Downey River Plantation, 1996, 1 sex?, P. Downey, Lum. 1, 23-27.6.96 (LFC) 2 males. ONTARIO: 3 mi N. Ramore, 1-14.VIII.1973, J. Redman & C. Starr (LFC) 1 female; Hamilton, 10-13-VII.1980, M. Sanbourne (CNC) 1 female; same data except: 15.VII.1981 (CNC) 1 sex?, 19.VII.1982 (CNC) 1 sex?; Pinery Pr. Pk., Grand Bend, 16-17.V.79, M. Sanbourne (CNC) 3 sex?; Guelph, 30. VII– 13.VIII.1982, D. Yu (CNC) 1 male; 18.VI.1982 (LFC) 1 male; Guelph, 43.536°N, 80.229°W, 1977 (DEBU) 1 sex?; 5 mi. Wye, VI-VII-1973, J. Redner & C. Starr (CNC, LFC) 3 males; same data except VII-VIII-1973 (CNC) 1 female; New Liskeard, 10.VII-1.VIII.1973, J. Redner & C. Starr (CNC) 1 male; Rondeau Pr. Pk., South Beach, 5.VI.1985, A. Davies, J.M. Campbell // In debris on beach at high water line (CNC) 1 male; Rondeau Pr. Park, sandy beach, 31.V.1985, A. Smetana (CNC) 4 females; Ancaster, 28.III.1963, J.E.H. Martin (CNC, LFC) 1 male, 27 sex?; Leeds Co., Chaffeys Locks, Lake Opinicon, mossy shore, 18.V.1975, I.M. Smith (CNC) 1 female; Ottawa, Kanata, 9.VII.79, A. Smetana (CNC) 1 sex?; Pr. Edward Co. (CNC) 24.X.1920, Brimley // J.F. Brimley Collection, Bequeathed 1976 (CNC) 1 male; same data except: 27.3.21 (LFC) 1 sex?; 8.V.46 (LFC) 1 sex?; Chatham, 22.V.1957, L.A. Miller (CNC, LFC) 2 males, 4 females; Windsor, Prairie area, 18. V– 6.VII.1976, Dondale & Redner (CNC) 1 male; Windsor, prairie-oak woodland, 28.VI-18.V.1976, Dondale & Redner (CNC) 1 sex?; same data except: 8.VII-27.VIII.1976, pitfall (CNC) 1 female, 4 sex?; Pin oak woods (CNC) 8 sex?; Blair, Rare, The Dells, 43.383°N, 80.388°W, 2006 (DEBU) 1 sex?; Chatham, 42.434°N, 82.129°W, 2007 (DEBU) 1 sex?; Elora, 43.685°N, 80.427°W, 1975 (DEBU) 1 sex?; Owen Sound, 44.570°N, 80.930°W, 1978 (DEBU) 1 sex?; Pembroke, 45.820, 77.III.1980 (CNC) 1 sex?; Sarnia, 42.987°N, 82.318°W, 1983 (DEBU) 1 sex?; Tavistock, 43.322°N, 80.836°W, 1983 (DEBU) 1 sex?; Wilde Lake Bog, 8 km E Arthur, 43.846°N, 80.447°W, 1987 (DEBU) 1 sex?; Cottage Beaulieu, Beaulieu, 14.IV.06 (CNC) 1 sex? ALBERTA: Lacombe, Ag. Canada Sta., 52°28'N, 0113°44'W, 20.VII.2001, Jim Broatch // Pitfall Group EXP 53, Canada plots (harvested in 2001) VII.20-119 and VII.20-107 (LFC) 2 females; Lacombe, 54.467°N, 113.733°W, 2001 (lit) (LFC) 1 sex?; Fairview, 56.067°N, 118.384°W, 1982, (DEBU) 1 sex? YUKON: Alaska Hwy., Burwash Creek, 61.35°N, 139°W, 1987 (DEBU) 1 sex? USA, PENNSYLVANIA: Harrisburg, 22.IV.1980, E.J. Kiteley (CNC) 1 female.