Phlaeopterus lagrandeuri Hatch, 1957

Mullen, Logan J., Campbell, J. M. & Sikes, Derek S., 2018, Taxonomic Revision of the Rove Beetle Genus Phlaeopterus Motschulsky, 1853 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini), The Coleopterists Bulletin 72, pp. 1-54 : 36-37

12. Phlaeopterus lagrandeuri Hatch, 1957

( Figs. 3D , 11B, 15E , 19E , 21A, 28E, 31E, 33E, 34A–B, 36A, 38E–F, 40E, 41D, 42C)

Phlaeopterus lagrandeuri Hatch 1957: 58 [original description]. Campbell and Davies 1991: 5; Herman 2001: 377; Bousquet et al. 2013: 89; Shavrin and Mullen 2015: 121.

they were observed feeding on windblown arthropods on the surface of the snow.

Remarks. Phlaeopterus kavanaughi can be distinguished from all other Phlaeopterus species by the tibiae pubescent to the apices, the shape of the pronotal lateral margins, the ventral longitudinal carina of the median lobe of the aedeagus, the shape and median transverse fold of the internal sac of the aedeagus, and the usually yellowish brown elytra and pronotal lateral margins that are paler than remainder of the body.

Etymology. This species is named in honor of Dr. David H. Kavanaugh, California Academy of Sciences, San Francisco, California, USA.

Type Locality. Carkeek Park , Seattle, Washington, USA .

Redescription. Habitus: Length 3.5–4.7 mm. Dark brown to reddish brown; legs, mouthparts, antennae, and elytra usually lighter ( Fig. 3D ); elytra with distinctive yellow to reddish yellow area ranging from small spot on humeri to nearly covering elytral disc. Head: Moderately narrow, width across eyes to head length slightly wider than long ( Fig. 34A–B ). Interantennal groove large, deeply impressed. Anteocellar foveae small, shallowly impressed. Eyes moderately pubescent on ventral half, with more than 10 setae ( Fig. 36A ). Antennomeres 5–10 1.2–1.8 times longer than wide; antennomeres 4–11 each with many sensory pits with papilliform projections. Ocelli present. Nuchal constriction vague. Mandibular molar area with L-shaped row of setae and additional oblique row of setae ( Fig. 28E ). Labrum with sensory pores along anterior margin only ( Fig. 31E ). Maxilla with lacinia and galea as in Fig. 38E–F . Epipharynx as in Fig. 33E. Hypopharynx as in Fig. 40E. Labial palpi with 3 rd palpomere 1.1–1.3 times longer than 2 nd palpomere. Gula as in Fig. 42C . Thorax: Pronotum moderately narrow ( Fig. 15E ), length to width ratio = 0.68–0.72; ratio of pronotal width to head width = 1.54–1.67; maximum width less than elytral width at bases; dorsal surface coarsely, sparsely punctate, punctures separated by average distance slightly less than diameter of a puncture; lateral margins narrowly explanate posterad lateral fovea, not explanate anterad lateral foveae; lateral foveae moderately impressed, contiguous with lateral margins. Elytra with humeral angles convex; epipleural carina not projecting; 2.2–2.5 times longer than pronotum; apical margins convex. Wings fully developed. Mesosternum with projecting tooth; longitudinal carina along midline of mesosternum absent or vague. Legs: All tibiae evenly pubescent to apex. Metatrochanter with tooth on apical margin ( Fig. 41D ). Protibia slightly sinuate on medioventral margin in male. Abdomen: Wing-folding spicules on tergites IV and V broad, transverse, nearly contiguous; tergite VI without wing-folding spicules. Apical palisade fringe on tergite VII absent. Aedeagus: Length 0.63–0.70 mm. Median lobe triangular. Parameres broad, diverging until just past midline then converging towards apex of median lobe (Fig. 21A). Internal sac irregular in shape, with 2 apical patches of thick setae.

Type Specimens. Holotype male (UAMObs: Ento:235215) labeled as follows: Seattle, WASH., Carkeek Park, Bel., V.3.1949/ Type ³, Phlaeopterus lagrandeuri, 1951 , M.H. Hatch . Allotype female (UAMObs:Ento:235775) labeled as follows: Corvallis, ORE., VI.1.1946, KM & DM Fender / ALLOTYPE ♀ Phlaeopterus lagrandeuri 1951 , M.H. Hatch/Marys Peak. Both specimens are deposited in the USNM.

Distribution. Phlaeopterus lagrandeuri is widely distributed from the Kenai Peninsula of Alaska, British Columbia, including Haida Gwaii and Vancouver Island, south through Washington and Oregon, and one specimen from Calahan, California (UAMObs:Ento:232633) ( Fig. 11B).

Bionomics. Adults have been collected from near sea level to 2,200 m elevation during May–August.

Remarks. Phlaeopterus lagrandeuri is easily distinguished from all other Phlaeopterus species by the especially coarse, sparse punctation of the pronotum and elytra, yellow spot on each elytron (although occasionally vague or absent), tooth on the apical margin of the metatrochanter, form of the mandibles, and the unique structure of the internal sac of the aedeagus. This species most closely resembles Siberian P. czerskyi but can be distinguished by many characters including the more shallowly impressed anteocellar foveae, less coarse punctation, lateral margins of the pronotum smooth, not crenulate, fully developed wings, and longer elytra.

Figures

Fig. 3. Phlaeopterus species, habitus. A) P. hatchi, male (UAMObs:Ento:232429), B) P. houkae, male (UAMObs:

Fig. 15. Pronota, dorsal view, of A) Lesteva pallipes LeConte, 1863, B) Lesteva longoelytrata (Goeze, 1777), C) Unamis sp. undescribed, D) Unamis sp., E) Phlaeopterus lagrandeuri, F) Phlaeopterus houkae, G) Phlaeopterus longipennis, H) Phlaeopterus obsoletus.

Fig. 19. Mesosterna, ventral oblique view, of A) Lesteva pallipes, B) Lesteva longoelytrata, C) Unamis sp. undescribed, D) Unamis sp., E) Phlaeopterus lagrandeuri, F) Phlaeopterus houkae.

Fig. 34. Phlaeopterus species, head, dorsal and dorsal oblique views. A–B) P. lagrandeuri, C–D) P. houkae, E–F) P. obsoletus.

Fig. 36. Phlaeopterus species, eyes, dorsal view. A) P. lagrandeuri, B) P. houkae, C) P. longipennis, D) P. frosti, E) P. bakerensis, F) P. olympicus.

Fig. 28. Ventral view of A) Left mandible of Lesteva longoelytrata, B) Right mandible of Lesteva pallipes, C) Right mandible of Unamis sp. undescribed, D) Right mandible of Unamis sp., E) Left mandible of Phlaeopterus lagrandeuri, F) Left mandible of Phlaeopterus houkae.

Fig. 31. Labra of A) Lesteva pallipes, B) Lesteva pubescens, C) Unamis sp. undescribed, D) Unamis sp., E) Phlaeopterus lagrandeuri, F) Phlaeopterus houkae, G) Phlaeopterus obsoletus, H) Phlaeopterus filicornis. White arrows indicate labrum.

Fig. 38. Maxillae, dorsal and ventral views, of A–B) Lesteva longoelytrata, C–D) Unamis sp. undescribed, E–F) Phlaeopterus lagrandeuri.

Fig. 42. Heads, ventral view, of A) Unamis sp. undescribed, B) Unamis sp., C) Phlaeopterus lagrandeuri, D) Phlaeopterus houkae, E) Phlaeopterus longipennis, F) Phlaeopterus elongatus.

Fig. 41. Phlaeopterus species, hypopharynges, dorsal view, of A) P. obsoletus, B) P. kavanaughi, C) P. elongatus. D) Phlaeopterus lagrandeuri, metatrochanter with apical tooth. Heads, ventral view, of E) Lesteva pallipes, F) Lesteva pubescens.