Schistoglossa carexiana Klimaszewski, 2009

Klimaszewski, Jan, Webster, Reginald & Savard, Karine, 2009, First record of the genus Schistoglossa Kraatz from Canada with descriptions of seven new species (Coleoptera, Staphylinidae, Aleocharinae), ZooKeys 22 (22), pp. 45-79 : 70-78

Schistoglossa carexiana Klimaszewski , sp. n.

urn:lsid:zoobank.org:act:AD67911A-6C81-4A64-AA0E-C8E15289DB26

Figs 7, 60–67, Map 6

Holotype (female): CANADA, British Columbia, Queen Charlotte Is., 8.8 km SW Tow Hill, J.M. Campbell; 22.VIII.1983, 83–108, treading Sphagnum & Carex at edge of marsh ( CNC). Paratypes: CANADA, British Columbia, Queen Charlotte Is., 8.8

km SW Tow Hill , J.M. Campbell ; 22.VIII.1983, 83–108, treading Sphagnum & Carex at edge of marsh ( CNC) 2 males, 4 females, ( LFC) 2 males, 1 female .

Etymology. Carexiana, an adjective derived from Carex , the major plant constituent of the habitat where the species was found. Gender feminine.

Diagnosis. Medium-sized species, length 2.8–3.0 mm, the largest in this genus, body moderately broad and subparallel, approximately uniformly dark brown, moderately glossy and moderately densely pubescent (Figs 7); antennae slim, all articles strongly elongate (Fig. 7); tempora each approximately as long as twice the maximal diameter of eye as seen from above (Fig. 7); elytra broadening posteriorly (Fig. 7); median lobe of aedeagus broad (Fig. 61), venter of tubus slightly sinuate (Fig. 62), apical sclerites of internal sac lunar-shaped in lateral view (Fig. 62); spermatheca club-shaped with capsule spherical and narrowed basally, bearing internal ribbings and without apparent apical invagination, stem moderately narrow and straight (Fig. 65).

Description. Body length 2.8–3.0 mm, width 0.4–0.5 mm, approximately uniformly dark brown with slightly paler tip of abdomen, legs, antennae, and mouthparts (Fig. 7); integument with weak microsculpture, sculpticells irregularly hexagonal, pubescence short, except slightly longer on head and abdomen, yellowish-brown in artificial light, moderately dense. Head slightly elongate, rounded posteriorly, carinate basally, tempora approximately as long as twice the maximum diameter of eye as seen from above (Fig. 7); antennae slim with all articles elongate (Figs 7); pronotum slightly transverse, broadly rounded laterally and posteriorly, broadest in apical half, pubescence directed anteriorly on apical third of the midline and laterally forming arched lines elsewhere (Fig. 7); elytra strongly transverse, and broadening posteriorly, hind margin nearly straight, pubescence directed obliquely posteriad (Fig. 7); abdomen parallel-sided, three basal tergites deeply impressed basally (Fig. 7). Male. Median lobe of the aedeagus broad and flattened (Fig. 61), venter of tubus sinuate, apex projected ventrally (Fig. 62), apical sclerites of internal sac lunar-shaped in lateral view (Fig. 62), and basal sclerites narrowly elongate; paramere as illustrated (Fig. 60); tergite 8 transverse and entire, apical margin without or with small emargination (Fig. 63); sternite 8 elongate and rounded posteriorly, antecostal suture sinuate (Fig. 64). Female. Spermatheca club-shaped with capsule spherical, bearing internal ribbings and without apparent apical invagination, stem moderately narrow and approximately straight (Fig. 65). Tergite and sternite 8 as illustrated (Figs 66, 67).

Bionomics. Adults were captured by treading Sphagnum and Carex at edge of marsh in August.

Geographic distribution (Map 6). Known only from the Queen Charlotte Islands of British Columbia, Canada.

Comments. Schistoglossa carexiana is distinct by its broad body and strongly elongate antennal articles. It has a median lobe of the aedeagus and spermatheca similar to S. blatchleyi and S. sphagnorum .

72 Jan Klimaszewski, Reginald Webster & Karine Savard / ZooKeys 22: 45–79 (2009)

65 0.5 mm 60 62 6Ι 63 64 66 67

Figures 60–67. Schistoglossa carexiana : 60 paramere 6Ι median lobe of aedeagus in dorsal view 62 median lobe of aedeagus in lateral view 63 male tergite 8 64 male sternite 8 65 spermatheca 66 female tergite 8 67 female sternite 8.

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Map 6. Collection localities in Canada of S. carexiana .

Schistoglossa blatchleyi ( Bernhauer & Scheerpeltz, 1926: 639) comb. n. Figs 8, 68–75, Map 7

Atheta blatchleyi ( Bernhauer and Scheerpeltz, 1926: 639) , replacement name for preoccupied Atheta (s. str.) caviceps Blatchley, 1910: 354; Gouix and Klimaszewski 2007: 72 ( CANADA, Northwest Territories, Yukon Territory, Manitoba, Ontario, Quebec, Newfoundland, New Brunswick; UNITED STATES: Alaska, Indiana). comb. n .

Boreophilia chillcotti Lohse, 1990: 157 (in Lohse et al. 1990) (= Schistoglossa ). Synonymized by Gusarov 2003a: 76 (as Atheta ).

Material examined. CANADA, Ontario: Sudbury Co., Mattagami , 23.VIII.1980, leg. R. Baranowski ( LUC) 1 female ; Mattagami , 27.VIII.1980, leg. R. Baranowski ( LUC) 1 male, ( LFC) 1 male ; 40 km NE Mattagami River, 26.VIII.1980, leg. R. Baranowski ( LUC) 1 female. Quebec: Hull, Gatineau Park , near Kidder Lake , 17.VIII. 1980, leg. R. Baranowski ( LUC) 1 female. New Brunswick: Charlotte Co., near New River , 45.1616°N, 66.6649°W, 7.VIII.2006, R.P. Webster , coll., sedge marsh, treading sedges into water ( RWC), 1 female. Queens Co. , Upper Gagetown , bog adjacent to Hwy 2, 45.8316°N, 66.2346°W, 12.IV.2006, R.P. Webster , coll., tamarack bog, in sphagnum hummocks in litter at bog margin ( RWC), 1 male, 1 female ; Grand Lake near Scotch- town, 45.8762°N, 66.1816°W, 30.IV.2006, R.P. Webster , coll., oak forest near lake in leaves at base of oak ( RWC), 1 female. Sunbury Co., Burton , W of Sunpoke Lake, 45.7589°N, 66.5779°W, 22.IV.2006, red maple swamp, in moist leaves near vernal pool ( RWC), 1 male ; Burton, Sunpoke Lake , 45.7575°N, 66.5736°W, 10.IV.2006, red maple swamp, in leaf litter at base of tree (probably an overwintering site) ( RWC), 1 male, 1 female. York Co., Charters Settlement , 45.8267°N, 66.7343°W, 16.IV.2005, R.P. Webster , coll., Carex marsh, in Sphagnum hummocks ( RWC), 2 males ; same locality data and collector, 14.V.2005, 29.III.2006, Carex marsh, sifting litter and moss at base of tree on margin of marsh ( RWC), 2 males, 1 female ; Fredericton, Nashwaaksis River at Rt. 105, 45.9850°N, 66.6900°W 6.V.2006, river margin, in flood debris on upper margin of river ( RWC) 1 female ; Canterbury , “Browns Mtn. Fen”, 45.8967°N, 67.6343°W, 2.V.2005, M. Giguère and R.P. Webster coll., calcareous cedar fen, in moss and litter at base of tree ( RWC) 1 male ; Rt. 645 at Beaver Brook , 45.6860°N, 66.8668°W, 6.V.2008, R.P. Webster , coll., Carex marsh in litter at base of dead red maple (probably an overwintering site) ( RWC) 1 male, 1 female ; 8.4 km W of Tracy off Rt. 645, 45.6821°N, 66.7894°W, 6.V.2008, 14.V.2008, R.P. Webster , coll., wet alder swamp in leaf litter and grass on hummocks ( RWC) 3 males, 2 females ; 15.5 km W of Tracy off Rt. 645, 45.6845°N, 66.8826°W, 10.V.2008, wet sphagnum bog/marsh with scattered sedges near red pine forest, treading ( RWC) 1 male, 1 female. Yukon Territory: Dempster Hwy , mi 26, 18.VII.1978, 2700 feet, A. Smetana and J.M. Campbell ( CNC) 1 female .

Diagnosis. Medium-sized species, length 2.7–2.8 mm, body narrow and subparallel, approximately uniformly dark brown, moderately glossy and moderately densely pubescent (Fig. 8); antennae robust, all articles elongate (Fig. 8); tempora each approximately twice the maximal diameter of eye as seen from above (Fig. 8); median lobe of aedeagus broad (Fig. 69), venter of tubus sinuate and apex blunt (Fig. 70), apical sclerites of internal sac lunar-shaped in lateral view (Fig. 70); spermatheca club-shaped with capsule spherical and narrowed basally, bearing internal ribbings and with broad apical invagination, stem moderately narrow and approximately straight (Fig. 73). This species is very similar to S. sphagnorum but has a proportionately longer elytra (Fig. 8).

Description. Body length 2.7–2.8 mm, width 0.4 mm, approximately uniformly dark brown with slightly darker head and abdomen and paler legs and mouthparts (Fig. 8); integument with weak microsculpture, sculpticells irregularly hexagonal, pubescence short, except slightly longer on head and abdomen, yellowish-brown in artificial light, moderately dense. Head slightly elongate, round, carinate basally, tempora as long as approximately twice the maximal diameter of eye as seen from above (Fig. 8); antennae moderately robust with all articles slightly to strongly elongate (Fig. 8); pronotum transverse, broadly rounded laterally and posteriorly, broadest in apical half, pubescence directed anteriorly on apical third of the midline and laterally elsewhere (Fig. 8); elytra moderately elongate, longer than pronotum, transverse, hind margin nearly straight, pubescence directed obliquely posteriad (Fig. 8); abdomen parallelsided, four basal tergites deeply impressed basally (Fig. 8). Male. Median lobe of the aedeagus broad and flattened (Fig. 69), venter of tubus sinuate and apex short and blunt (Fig. 70), apical sclerites of internal sac lunar-shaped in lateral view (Fig. 69), and

First record of the genus Schistoglossa Kraatz from Canada... 75

73 68 0.2 mm 7Ι 72 69 70a 70b 74 75

Figures 68–75. Schistoglossa blatchleyi : 68 paramere 69 median lobe of aedeagus in dorsal view 70 median lobe of aedeagus in lateral view 7Ι male tergite 8 72 male sternite 8 73 spermatheca 74 female tergite 8 75 female sternite 8.

basal sclerites narrowly elongate (Fig. 69); paramere as illustrated (Fig. 68); tergite 8 transverse and entire, apical margin without or with small emargination (Fig. 71); sternite 8 elongate and rounded posteriorly, antecostal suture sinuate and pointed medially (Fig. 72). Female. Spermatheca club-shaped with capsule spherical and narrowed basally, bearing internal ribbings and with broad apical invagination, stem moderately narrow and straight (Fig. 73). Tergite and sternite 8 as illustrated (Figs 74, 75).

Bionomics. In New Brunswick, S. blatchleyi often occurs with S. sphagnorum , but in a wider variety of wetland habitats than S. sphagnorum . Adults were captured in or on the margin of circumneutral Carex marshes and fens by treading sedges and Sphagnum into water or sifting litter at the base of trees, in Sphagnum hummocks on margin of tamarack ( Larix laricina ) bogs, red maple swamps in moist leaves near vernal pools and leaves at base of trees, wet alder swamps in leaf litter and grass on hummocks, in moss and litter at the base of trees in calcareous eastern white cedar ( Thuja occidentalis ) fens with shrubby cinquefoil ( Pentaphylloides floribunda A. Love ). A few adults were collected in flood debris along a river margin. In New Brunswick, this species becomes active very early in the spring (late March and April) shortly after the snow has melted in open sun-exposed areas, usually at the base of trees and when snow is often still present in the adjacent forests. These sites may be overwintering sites. Adults were collected from March to July in New Brunswick. Elsewhere, adults were captured in riparian habitats in July and August.

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Map 7. Collection localities in Canada of S. blatchleyi .

Geographic distribution (Map 7). Known from Newfoundland and Labrador, New Brunswick, Quebec, Ontario, Manitoba, Northwest Territories and Yukon Territory in Canada and Alaska and Indiana in the United States. It is recorded here for the first time for New Brunswick, Ontario and Quebec.

Figures 76–86. Mouthparts: 76–78 Schistoglossa viduata : 76, 77 mandibles 78 labium 79-82 Schistoglossa sphagnorum : 79, 80 mandibles 8Ι labium and mentum 82 maxilla 83–86 Boreophilia islandica : 83, 84 mandibles 85 labium and mentum 86 maxilla.

Comments. Schistoglossa blatchleyi is externally similar in appearance to the other members of the genus and in particular to S. carexiana and S. sphagnorum . Examining the genital structures is essential for definitive identification of the three species.