Boreophilia caseyi Lohse, 1990

Klimaszewski, Jan, Sikes, Derek S., Brunke, Adam & Bourdon, Caroline, 2019, Species review of the genus Boreophilia Benick from North America (Coleoptera, Staphylinidae, Aleocharinae, Athetini): Systematics, habitat, and distribution, ZooKeys 848, pp. 57-102 : 57

12. Boreophilia caseyi Lohse, 1990 Figs 100-108

Boreophilia caseyi Lohse, in Lohse et al. 1990: 155. Holotype (male): USA, Alaska, Umiat, 5.VIII.1950, R Madge, Boreophilia caseyi Lohse, CNC No. 20309 (CNC) (fig. 0). Paratypes: USA, Alaska, Cape Thompson, 21.VII.1961, R Madge, CNC No. 20309 (CNC) 1 female; Canada, NWT, Wharton Lk., 63°52'N, 99°45'W, 18.VII.1966, JG Chillcott, CNC No. 20309 (CNC) 1 female; Canada, YT, North Fork Pass, Ogilvie Mts., 3500', 18.VI.1962, RE Leech, CNC No. 20309 (CNC) 1 female (figs 0).

Boreophilia manitobensis Lohse 1990, in Lohse et al. 1990. New synonymy. Canada: MB; USA: AK. Holotype (male): Canada, Manitoba, Churchill, 29.VI.1937, WJ Brown, CNC No. 20311 (CNC). Paratypes: USA, Alaska, Umiat, 12.VII.1959, JEH Martin (CNC) 1 sex undetermined; Manitoba, Churchill, 17.VI.1952, JG Chillcott (CNC) sex undetermined.

Diagnosis.

Body narrow, subparallel, moderately glossy, abdomen slightly more so (Fig. 100); length 3.5-3.8 mm; head, pronotum and abdomen, except for its apex, dark brown, elytra reddish brown, legs yellowish red-brown, or body uniformly piceous with tarsi and tibiae reddish brown; antennomeres VIII-X subquadrate (females) to slightly elongate (males); pronotum as long as elytra at suture or slightly shorter, maximum width of pronotum slightly less than maximum width of elytra. Male. Tubus of median lobe of aedeagus straight basally and strongly projecting ventrad at apex, apex broad and angular in lateral view (Fig. 101), in dorsal view bulbus broad and angular apico-laterally, with two elongate narrow sclerites of internal sac (Figs 102, 103); tergite VIII arcuate apically (Fig. 104); sternite VIII elongate, parabolic apically (Fig. 105). Female. Spermatheca: capsule pitcher-shaped basally with subspherical apical part bearing small invagination, stem sinuate, narrow, looped posteriorly (Fig. 108); tergite VIII arcuate apically (Fig. 106); sternite VIII rounded apically, antecostal suture straight medially and sinuate laterally (Fig. 107).

The spermatheca of B. caseyi was illustrated in Lohse et al. (1990). It is slightly deformed and based on a female captured in a different locality than that of the male holotype. It may belong to B. subplana , a species with very similar spermatheca. The spermathecal stem of B. caseyi has a broad posterior loop and female sternite VIII is rounded apically (Fig. 108), and not triangularly produced and pointed medially as in B. subplana (Fig. 99).

Distribution.

Nearctic species, recorded from Canada: MB, NT, YT; USA: AK.

Collection data

. Habitat: arctic tundra. Collecting methods: pitfall traps. Collecting period: June and July.

Additional material examined.

USA, Alaska, Toolik Lake Field Station, 724 m el., 68.6286N, 149.59772W, +/- 6m arctic tundra, 3 pitfalls, 2. VI– 30.VII.2008, D Sikes UAM100044717, UAM100044680, UAM100044997 (UAM) 2 males, 1 female.

Comments.

Lohse, in Lohse et al. (1990) described the new species B. manitobensis from MB and AK. The holotype from MB is represented by a male with a distorted median lobe of the aedeagus. We have studied the external and internal morphology of the two species, including the structures of internal sac, and found no significant differences between B. manitobensis and B. caseyi . Therefore, B. manitobensis is here synonymized with B. caseyi . The two species were published in the same paper, but B. caseyi has page priority and therefore was chosen as a valid species.

DNA Barcode data.

Four specimens of B. caseyi from UAM were submitted for DNA barcoding and three did not produce DNA sequences. The one which was successfully sequenced was flagged on BOLD as possibly contaminated so we excluded it from our analyses.