Phlaeopterus hatchi Mullen and Campbell, 2018

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 : 33-34

9. Phlaeopterus hatchi Mullen and Campbell , new species

( Figs. 3A , 10A , 17D , 25B , 29F , 35C–D ) Zoobank.org/ urn:lsid:zoobank.org:act:FF1FC2B7-035B-4479-88D4-6E3B9C93B407

Hatch 1957: 59 [misidentification as P. rufitarsis ].

Type Locality. Mt. Begbie , British Columbia ,

Canada.

Description. Habitus: Length 5.5–6.9 mm. Dark brown, almost black; palpi, elytra, and glabrous apices of tibiae lighter ( Fig. 3A ). Head: Moderately narrow, ratio of width across eyes subequal to head length. Interantennal groove shallowly impressed ( Fig. 35C–D ). Anteocellar foveae large, deeply impressed. Eyes glabrous or with less than 10 scattered setae near ventral margin. Antennomeres 5–10 at least 2 times longer than wide; antennomeres 4–11 each with many sensory pits with papilliform projections. Ocelli present. Nuchal constriction vague. Mandibular molar area with Lshaped row of setae. Labrum with sensory pores along entire surface. Labial palpi with 3 rd palpomere 1.6–1.8 times longer than palpomere 2. Thorax: Pronotum moderately narrow ( Fig. 17D ), length to width ratio = 0.78–0.84; ratio of pronotal width to head width = 1.30–1.39; maximum width less than width of elytra at bases; punctures on dorsal surface separated by average distance equal to greater than diameter of single puncture; without vague impression near midline on ventral surface (as in P. filicornis ); lateral margins deflexed posterad and anterad lateral foveae; lateral foveae moderately impressed. Elytra with humeral angles convex; epipleural carina not projecting; 2.4–3.0 times longer than pronotum; apical margins not sexually dimorphic, broadly convex and not diverging in both sexes ( Fig. 29F ). Wings fully developed in most individuals, brachypterous in very few. Mesosternum with projecting tooth; longitudinal carina along midline of mesosternum complete. Legs: Apices of all tibiae glabrous, length of subglabrous apex of metatibia as ratio to metatibial length = 4.4–7.8. Metatrochanter without tooth on apical margin. Abdomen: Wing-folding spicules on tergites IV and V broad, transverse, nearly contiguous; tergite VI lacking wing-folding patches. Aedeagus: Length 1.28–1.40 mm. Median lobe short, with lateral margins subparallel then acutely triangular nearing apex ( Fig. 25B ). Internal sac elongate, nearly as long as median lobe, moderately heavily sclerotized, covered with microspinules but with distinctly larger microspinules in patches near apex.

Type Specimens. Holotype male (UAMObs: Ento:235832) and allotype female (UAMObs:Ento: 235833) labeled as follows: B.C., Mt. Begbie , 6300’, VIII–30–1971, J.M. Campbell / HOLOTYPE ³ (or ALLOTYPE ♀) Phlaeopterus hatchi , desig. L.J. Mullen and J.M. Campbell, CNC No. 18463 (red label). Both specimens are deposited in the CNC. Paratypes (n = 73) are deposited in the AMNH, CAS, CNC, CSCA, FMNH, MCZ, and USNM.

Distribution. Phlaeopterus hatchi is known from northern California north through the Cascade Range, the Mission Mountains of Montana, the Rocky Mountains of British Columbia, and in Alaska by a single specimen (UAMObs:Ento: 232742) collected by A. Ord in 2012 between Haines and Juneau ( Fig. 10A ).

Bionomics. Adults have been collected at 1,100 –2,130 m elevation during July–August. Adults were mostly collected from under stones at the edges of small, cold streams, but sometimes were taken under rocks near snowfields or in splash zones of waterfalls and moss along the edges of streams.

Remarks. Phlaeopterus hatchi can be distinguished from all other Phlaeopterus species by the shape of the pronotum, the glabrous apices of the tibiae, and the aedeagus. It is similar to P. filicornis , from which it differs by characters discussed in the Remarks section of that species.

Etymology. This species is named in honor of Dr. Melville H. Hatch.

Figures

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

Fig. 10. Distributions of Phlaeopterus species based on all georeferenced specimen records. A) P. hatchi, B) P. houkae. Grey dots represent localities where at least one Phlaeopterus species, but not the species of interest, was collected. Red dots represent localities where the species of interest was collected.

Fig. 17. Phlaeopterus species. Pronota, dorsal view, of A) P. fusconiger, B) P. frosti, C) P. filicornis, D) P. hatchi, E) P. elongatus. Abdominal segments 4–6, dorsal view, of F) P. houkae, G) P. obsoletus, H) P. elongatus.

Fig. 25. Phlaeopterus species, aedeagi (left = ventral view; right = dorsal view of median lobe). A) Phlaeopterus frosti, B) P. hatchi, C) P. filicornis, D) P. elongatus.

Fig. 29. Phlaeopterus species. Right mandibles, ventral view, of A) P. obsoletus, B) P. bakerensis, C) P. elongatus. D) P. bakerensis, humeral angle of elytron, dorsal view. Apices of elytra of E) P. loganensis, F) P. hatchi, G) P. filicornis female.

Fig. 35. Heads, dorsal and dorsal oblique views, of A–B) Phlaeopterus kavanaughi, C–D Phlaeopterus hatchi. Eyes, dorsal view, of E) Lesteva longoelytrata, F) Unamis sp. undescribed.