Paraquedius marginicollis, Brunke, 2022

Brunke, Adam J., 2022, A world generic revision of Quediini (Coleoptera, Staphylinidae, Staphylininae), part 1. Early diverging Nearctic lineages, ZooKeys 1134, pp. 129-170 : 129

publication ID	https://dx.doi.org/10.3897/zookeys.1134.87853
publication LSID	lsid:zoobank.org:pub:C79C5E40-D9C6-4E3B-816F-0201713DBA77
persistent identifier	https://treatment.plazi.org/id/75E79E2A-CDE5-4FA2-A6F6-9BD36A2CAE1B
taxon LSID	lsid:zoobank.org:act:75E79E2A-CDE5-4FA2-A6F6-9BD36A2CAE1B
treatment provided by	ZooKeys by Pensoft
scientific name	Paraquedius marginicollis
status	sp. nov.

Treatment

Paraquedius marginicollis sp. nov.

Figs 2H View Figure 2 , 5B View Figure 5 , 8A-F View Figure 8 , 9G View Figure 9 , 11D (map) View Figure 11

Quedius (Paraquedius) puncticeps Horn (misidentification): Smetana 1981 (distribution records); Brunke et al. 2016, 2019, 2021 (phylogeny).

Type locality.

5.4 miles southeast of Seiad Valley [probably at O’Neil Creek], Siskiyou County, California, United States.

Type material.

Holotype (male, CNC): Siskiyou County, 5.4 mi SE Seiad Valley, 457 m, 4.VII.1976, #1272, L. & N. Herman [printed label] / CNC977001 [identifier] / HOLOTYPE Paraquedius marginicollis Brunke, des A. Brunke 2022 [red printed label]. Paratypes (19, CNC, FMNH, UTCI, MCZ). Same data as holotype (2 females, CNC).

Canada: British Columbia: Vancouver Island: ‘V.I’ [no data] (1 female, CNC); Darling River, Pacific Rim National Park, 13.VII.1975, J.M. Campbell & B.A. Campbell (1 male, CNC); 10 mi E [Port] Alberni, MacMillan Provincial Park, 26.V.1968, Campbell and Smetana (1 female, CNC); Lower Mainland: Hells Gate, rest stop approx. 2 km S on Hwy 1, mountain stream, under weeds, 17.IX.1982, B & J. Carr (1 male, CNC).

United States: California: ‘Cal.’ (1 female, MCZ); El Dorado Co.: 0.7 mi E Pacific House, 38.758, -120.493, 1190 m, ex. screening flume, 18.VI.1989, A.R. Hardy & D. Carlson (1 male, UTCI); Humboldt Co.: Prairie Creek Redwoods State Park, ca. 2 mi S Fern Canyon, base of Gold Bluffs, 41.3748, -124.07, 10 m, scrubby coastal forest, on algae and vertical rock face at seep, 18.VI.2006, A. Newton & M. Thayer (1 female, FMNH); Marin Co.: Samuel P. Taylor State Park, 4.V.1968, Campbell and Smetana (1, CNC); Napa Co.: 10.1 mi N Calistoga, 579 m, flood debris, forest stream, 21.V.1976, A. Newton & M. Thayer (1 male, CNC); San Bernardino Co.: 1 mi SW [W] Mountain Home Village, 15.III.1983, A. Smetana (1 female, CNC); Camp Angelus [= Angelus Oaks], 1.VII.1970, K. Stephan (1 female, CNC); Trinity Co.: Upper Canyon Creek Meadows, 16 mi N Junction City, 1463 m, 13-19.VII.1979, J.M. & B.A. Campbell (1 female, CNC); Tulare Co.: Ash Mountain Power Station [Sequoia National Park], 23.XI.1982, J.A. Halstead (1, CNC); Oregon: Benton Co.: Mary’s Peak, 1158 m, 27.VII.1979, J.M. & B.A. Campbell (1 female, CNC); Curry Co.: Agness Rd., crossing at Wake Up Rilea Creek, under stones and in little pools of water along shady, cascading creek, 10.VIII.1978, B.F. & J.L. Carr (1 male, CNC); Jackson Co.: Highway 140, Little Butte Creek, 23.VI.1974, A. & D. Smetana (1 male, CNC); Washington: Clallam Co.: 6.5 miles N Sappho, 366 m, 16.VII.1978, #1669, L. & N. Herman (1 male, CNC.

All paratypes with: PARATYPE Paraquedius marginicollis Brunke, des A. Brunke 2022 [yellow printed label]

Etymology.

The species epithet refers to the diagnostic pale margin of the pronotum.

Diagnosis.

Paraquedius marginicollis is most easily distinguished from the only other species of the genus by the pale base of antennomere 1 and margins of the pronotum. For other differences see the key above.

Description.

Measurements ♂ (n = 5): HW/HL 1.04-1.09; PW/PL 1.01-1.08; EW/EL 1.13-1.17; ESut/PL 0.83-0.88; PW/HW 0.99-1.07; forebody length 4.0-4.3 mm.

Measurements ♀ (n = 5): HW/HL 1.06-1.10; PW/PL 1.01-1.08; EW/EL 1.11-1.17; ESut/PL 0.86-0.89; PW/HW 1.01-1.08; forebody length 4.3-4.5 mm.

Similar to P. puncticeps and differing only in the following: antennomeres 1 and 2 with pale base (Fig. 5B View Figure 5 ); marginal area of pronotum and at least extreme base of elytra, suture and sometimes scutellar area, paler (Fig. 2H View Figure 2 ); maxillary palpi usually slightly paler; head and pronotum with microsculpture more distinct; frons with central glabrous area not reaching posteriad to middle of eyes (Fig. 5B View Figure 5 ); frons with pair of impressions shallower and usually more linear, forming a border around raised central area (Fig. 5B View Figure 5 ); elytra with punctures slightly finer, disc always strongly uneven, with metallic greenish blue reflection; abdominal tergites with central, sparsely punctate to impunctate, raised areas, in addition to usual basal impressions; whorls of pale setae on tergites appearing more distinct from surrounding setae; male with emargination of sternite VIII slightly shallower, about twice as wide as deep; tergite X more slender, with narrower apex and setae more restricted to apical area; sternite IX with apex broadly, shallowly emarginate; median lobe of aedeagus in ventral view subparallel-sided, with truncate or broadly rounded apex (Fig. 8A, B View Figure 8 ); median lobe in lateral view with short apical area that is acute to obtusely pointed (Fig. 8C, D View Figure 8 ); paramere varying from slightly longer to slightly shorter than median lobe, spoon-shaped to lancet-shaped (Fig. 8E, F View Figure 8 ), peg setae forming long, oval-shaped median field (Fig. 8E, F View Figure 8 ). Female with tergite X shorter, with apex broader and truncate (Fig. 9G View Figure 9 ).

Distribution.

Canada: BC. United States: CA, OR, WA.

Bionomics.

Specimens with microhabitat data were collected at a variety of elevations (near sea-level to 1463 m), on or under surfaces (under rocks, on vertical rockface), in association with running water, including mountain streams, vertical seeps and waterfalls. The specimen from flood debris was likely washed out of its normal microhabitat by heavy rains.

Comments.

Initially, it was thought that the specimen from Clallam County, Washington represented yet another species, as the paramere is remarkably lancet-like (Fig. 8E View Figure 8 ) and longer than the median lobe, while most specimens have a spoon-shaped paramere that is shorter than the median lobe. With further dissections, a few intermediate forms were found, though this specimen still represents the extreme of variation.