Quedius lanei Hatch 1957

Quedius lanei Hatch, 1957 (Fig. 1, 4, 5, 10B, 16D, 17, 21) Quedius lanei Hatch, 1957: 216 [Type locality: Washington: Blue Mts.] References. KඈඋGൾ (1962b): 333 (characters and notes); Sආൾඍൺඇൺ (1971a): 144 (characters and distribution); (1976a): 174 (distribution). Material examined. USA: Cൺඅංൿඈඋඇංൺ: Fresno County, Huntington Lake, [37.24, -119.18], 25.IV.1960, leg. L. G. Ingles (2 CNC); Lassen National Park,Summit Lake, [40.49, -121.42], 2042 m, 15.VII.1979, J. M. & B.A. Campbell (3 CNC). Nൾඏൺൽൺ: Lake Tahoe, Zephyr Cove, [39.01, -119.94], 1889 m, 9.XII.1986, leg.A.Smetana (1 CNC). OඋൾGඈඇ: 16 mi NE Bly Deming Creek Road, [42.55, -120.76], 1828 m, 21.VII.1979, leg. J. M. Campbell & J. Schuh (3 CNC); Grant County, Strawberry Range, Strawberry Lake, [44.3, -118.68], 1920 m, 4.VI.1989, leg. A. Smetana (20 CNC); Klamath County, Gearhart Mountain, [42.51, -120.86], 2194 m, 24.VI.1974, leg.A. & D. Smetana (1 CNC); Klamath County, Mare’s Egg Springs, 7.3 mi SW Fort Klamath, [42.66, -122.08], 25.VI.1974, leg. A. & D. Smetana (2 CNC); Union County, Blue Mountain Road 62, Jarboe Creek, [45.80, -117.85], 1200 m, 29.V.1989, leg. A. Smetana (1 CNC). WൺඌHංඇGඍඈඇ: Blue Mountain, [45.5, -118], 914 m, 29.VIII.1923, leg. M. C. Lane (1 CNC). Redescription. Measurements JJ (n = 3): HW = 1.56– 1.78 (1.63); HL = 1.33–1.49 (1.39); HL/HW 0.84–0.87 (0.86); PW = 2.04–2.22 (2.11); PL = 1.80–2.00 (1.87); PL/PW 0.88–0.90 (0.89); EW = 2.16–2.29 (2.20); EL = 2.02–2.11 (2.06); EL/EW 0.92–0.95 (0.94); EL/PL 1.06– 1.14 (1.10); PW/HW 1.49–1.53 (1.52); forebody length 5.18–5.60 (5.33). ♀♀ (n = 6): HW = 1.53–1.73 (1.64); HL = 1.27–1.40 (1.35); HL/HW 0.77–0.86 (0.82); PW = 1.96–2.29 (2.09); PL = 1.73–2.00 (1.85); PL/PW 0.87–0.91 (0.89); EW = 2.00–2.44 (2.18); EL = 1.93–2.29 (2.07); EL/EW 0.92–1.02 (0.95); EL/PL 1.09–1.18 (1.12); PW/ HW 1.46–1.63 (1.55); forebody length 4.98–5.69 (5.27). Medium sized species; body dark brown to black (Fig. 10B). Head black, distinctly transverse with eyes medium sized (EyL/TL = 1.81–2.14 (1.99)), microsculpture of transverse waves, with two interocular punctures between anterior frontal punctures (Fig. 6G); antennae and palpi dark with joints pale reddish, all antennomeres elongate, except last and penultimate antennomere almost transverse. Thorax: pronotum black, slightly wider than long, clearly wider than head, with microsculpture of transverse waves, three punctures in dorsal row and one to two in sublateral row with its posteriormost puncture reaching just beyond level of first puncture of dorsal row; scutellum sparsely punctured and pubescent; elytra variable in coloration, from all black or reddish brown to occasionally dark with reddish sutural margins, uniformly pubescent, punctures clearly separated, quadrate or slightly wider than long, slightly longer than pronotum; legs reddish brown with inner face of tibia and inner surface of femur darkened and tarsi paler. Abdomen dark brown to black, tergites uniformly punctured, with clear iridescence. Male. Aedeagus (Figs 16D, 17): paramere lanceolate, rather broad, without clear basal attenuation, extending to apex of median lobe, with small sensory peg setae forming two irregular rows meeting in an irregular cluster below apex; median lobe lanceolate, broad, with sides slightly constricting until abrupt constriction near pointed apex, on parameral side with two blunt teeth simply protruding inward and slightly basad; internal sac with two larger oval and two smaller rounder sclerites. Differential diagnosis. Quedius lanei can be distinguished from Q. laticollis and Q. strenuus by the presence of two additional setiferous punctures between the anterior frontal punctures. It can be distinguished from Q. labradorensis by the darker body and the clearly darkened basal three antennomeres. It can be distinguished from other members of the molochinoides -group (Q. altanai, Q. horni, and Q. molochinoides) only by the male genitalia, specifically by the paramere, which is parallel-sided to constricted at base, and the broad median lobe with a constricted apex and two blunt teeth pointing in and downwards. However, Q. lanei does not seem to co-occur with any other species of the molochinoides- group, this fact reducing the need of genitalia investigation in all cases. Comments. A series of specimens in Sආൾඍൺඇൺ (1971) including one Hatch paratype from Fish Lake in Summerland, British Columbia ascribed to Q. lanei was found to belong to Q. molochinoides. Quedius lanei does not occur in Canada. Paratypes of Q. lanei from Idaho were found to belong to Q. altanai and have thus been moved to this species. Bionomics. Quedius lanei prefers mountainous areas and occurs only at high elevations with records from roughly 1000 m in the northern part of its range to up to 2200 m in the southern part. Little is known about the prefered habitat of the species, but based on the examined records it seems to be found mainly in wet debris near creeks or mountain lakes. For example, the Oregon specimens from Klamath County were collected by sifting wet moss and deciduous leaf litter (willow) at the edges of fast-running creeks or by sifting wet debris on the bottom of a dried-out pond in a coniferous forest (Sආൾඍൺඇൺ 1976). Distribution. Quedius lanei is currently known from high elevation sites on the eastern slopes and foothills of Cascades, the Sierra Nevada and the Blue Mountains (ecoregions 6.2.8, 6.2.9 and 6.2.12, Fig. 21). It is found from sutheastern Washington through Oregon to much of eastern California and limited areas of western Nevada. In the north it does not seem to extend into the northern part of the Cascades, although based on the ecoregions it may be be present quite far north on the eastern slopes. To the northwest it is replaced by Q. horni. Quedius lanei was formerly considered to also include specimens from central and southern Rockies, but we here show that these belong to a different species Q. altanai described as new herein.

Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.