Oxypoda Mannerheim, 1830

McLean, John, Klimaszewski, Jan, Li, Agnes & Savard, Karine, 2009, Survey of rove beetles (Coleoptera, Staphylinidae) from Stanley Park, Vancouver, British Columbia, Canada, with new records and description of a new species. Part 1, ZooKeys 22 (22), pp. 5-17 : 8-12

Genus Oxypoda Mannerheim, 1830

For literature review and diagnosis, see Klimaszewski et al. 2006.

1. Oxypoda stanleyi Klimaszewski & McLean , sp. n. urn:lsid:zoobank.org:act:A998F39F-A93C-40AF-9E03-BA11A6263F8C

Figs 1–9

HOLOTYPE (male): CANADA, British Columbia, Vancouver, Stanley Park, Hollow Tree , CWH, 49°18΄22˝N, 123°09΄11˝W, pitfall trap #5, 29.IV-10 V. 2007, J.A. McLean, A. Li, J. Derhousoff; Staphylinidae A. Li I, 2008 ( LFC) . PARATYPES: labelled as the holotype ( LFC) 2 males, 1 female, funnel trap #4 ( UBC) 1 female ; same labels as the holotype except: 10.V-23.V.2007, pitfall #5 ( LFC) 1 male ; 20.VI- 29.VI.2007, pitfall #5 ( LFC) 1 male, ( UBC) 2 males ; 10.VII-31.VII.2007, pitfall #5 ( LFC) 1 female ; Vancouver , Stanley Park, Vancouver Aquarium, 49°18΄02˝N, 123°07΄04˝W, pitfall trap #1, 20.IV-29.IV.2007, pitfall #1, J.A. McLean, A. Li, J. Derhousoff ( LFC) 1 male ; same data except: 29.IV-10.V.2007, pitfall #1 ( LFC) 1 male ; 10.V-23.V.2007, pitfall #4 ( LFC) 2 males, ( UBC) 5 males, 1 female ; 23.V-7. VI.2007, pitfall #5 ( LFC) 1 female, ( UBC) 2 males ; 19.VI-10.VII.2007, pitfall #4 ( LFC) 1 male, ( UBC) 2 females .

Etymology. This species is named for the type locality where the original specimens were captured. Stanley Park was formally opened in 1888 by Lord Stanley, Earl of Preston, the Governor General of Canada ( Steele 1988).

Diagnosis. Oxypoda stanleyi may be distinguished from the remaining Nearctic species of Oxypoda by the following features: body narrowly oval, rust-brown with dark brown head and at least posterior third of abdomen, forebody with scarcely visible microsculpture, length 1.6–1.9 mm, antennae strongly thickened and incrassate (Fig.

Figure Į. Oxypoda stanleyi Klimaszewski & McLean , sp. n., dorsal habitus.

1), median lobe of aedeagus and spermatheca of a characteristic shape (Figs. 2, 3, 7). Known to occur in coastal British Columbia.

Description. Body small, reddish-brown with dark brown head and at least posterior half of abdomen; length 1.6–1.9 mm, approximately narrowly oval, slightly broadest at middle of elytra, abdomen subparallel basally and gradually narrowed posterad (Fig. 1); forebody with scarcely visible microsculpture, sculpticells of flattened hexagonal shape; integument moderately glossy; pubescence sparse on head and abdomen and denser elsewhere (Fig. 1). Head (Fig. 1) broadest at posterior eye level, narrower than pronotum, pubescence directed anterad centrally and slightly obliquely laterad laterally, frontal suture and infraorbital carina strong; eyes moderately sized, approximately as long as postocular area; antennae strongly swollen, articles 4–9 strongly transverse and incrassate (Fig. 1); maxillary palpus with 4 articles, last one needle-shaped; labial palpus with 3 articles; glossae separated, V-shaped; pronotum moderately convex, strongly transverse and slightly narrower than elytra at maximum width, ratio of maximum pronotal width/length 1.3, pubescence directed straight posterad along midline of disc and obliquely posteriorly elsewhere (Fig. 1); elytra slightly broader at middle than pronotum and at suture slightly shorter than pronotum, pubescence directed approximately straight to slightly obliquely posterad (Fig. 1); abdomen subparallel basally and slightly tapering apically; three basal tergites with strong basal impressions; metatarsus with basal article elongate and at least as long as two following articles combined. Male. Tergite 8 slightly transverse, truncate apically, antecostal suture slightly sinuate medially (Fig. 5). Sternite 8 slightly elongate, rounded apically, antecostal suture slightly sinuate medially (Fig. 6). Median lobe of aedeagus with moderately sized bulbus and subparallel tubus abruptly tapering apically in dorsal view (Fig. 3); venter of tubus arcuate basally and straight subapically ending sharply in lateral view (Fig. 2); crista apicalis large (Fig. 2); internal sac with complex structures (Figs. 2, 3); paramere with narrow and elongate apical lobe, subapical and basal setae moderately long (Fig. 4). Female. Tergite 8 similar to that of male (Fig. 8). Sternite 8 approximately as long as wide, truncate apically, antecostal suture straight medially (Fig. 9). Spermatheca with small spherical capsule with invagination facing up and long and narrow sinuate stem (Fig. 7).

Distribution. Oxypoda stanleyi is known only from Stanley Parkm in Vancouver, British Columbia.

Collection and habitat data. Adults were collected from April through July using pitfall traps and one specimen was captured in a funnel trap. Th e majority of specimens were captured in May. Th e thick antennae indicate that this species may be affiliated with ants, but this needs to be confirmed by field observations.

Comments. Oxypoda stanleyi is distinct from other Nearctic species of Oxypoda by the short macrosetae on the apical tergites and sternites 8 (Figs. 5, 6, 8, 9), and by its swollen antennae. Due to these characteristics it should be assigned to a species group of its own. Externally, except for the swollen antennae, it resembles the species from the Inimica species group described by Klimaszewski et al. (2006). It keys to couplet 2

Figures 2–9. Genital structures and terminalia of Oxypoda stanleyi (2– 6 male): 2 median lobe of aedeagus in lateral, and dorsal view 3, 4 paramere 5 tergite 8 6 sternite 8 (7– 9 female): 7 spermatheca 8 tergite 8 9 sternite 8.

in Klimaszewski et al. (2006), which should be modified as follows to accommodate this species: