Phlaeopterus obsoletus 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 : 42-45

publication ID

https://doi.org/ 10.1649/0010-065X-72.mo4.1

publication LSID

lsid:zoobank.org:pub:65F0E5A1-D396-4517-9E14-764B3073E0EF

persistent identifier

https://treatment.plazi.org/id/D2D70CE0-DDEC-4834-857E-DC6D80FFD18D

taxon LSID

lsid:zoobank.org:act:D2D70CE0-DDEC-4834-857E-DC6D80FFD18D

treatment provided by

Carolina

scientific name

Phlaeopterus obsoletus Mullen and Campbell
status

sp. nov.

15. Phlaeopterus obsoletus Mullen and Campbell View in CoL , new species

( Figs. 4C View Fig , 13A, 15H View Fig , 17G View Fig , 20B View Fig , 21D, 29A, 31G, 33G, 34E–F, 37H–I, 39C–D, 41A) Zoobank.org/ urn:lsid:zoobank.org:act:D2D70CE0-DDEC-4834-857E-DC6D80FFD18D

Hatch 1957: 461 [misidentification as V. longipennis ].

Type Locality. Berkeley Park , Mt. Rainer National Park, Washington, USA .

Description. Habitus: Length 2.9–3.9 mm. Light brown to dark brown, legs lighter, antennae sometimes lighter ( Fig. 4C View Fig ). Head: Width across eyes to head length slightly wider than long ( Fig. 34E–F View Fig ). Interantennal groove absent. Anteocellar foveae moderately large, deeply impressed. Eyes moderately pubescent on ventral half, with more than 10 setae. Antennomeres 3–10 each 1.3–1.9 times longer than wide, antennomeres 4–11 each with many sensory pits with groups of pore-like openings ( Fig. 37H–I View Fig ). Ocelli absent. Nuchal constriction vague. Mandibular molar area with Lshaped row of setae. Epipharynx as in Fig. 33G. Maxillary palpus as in Fig. 39C–D View Fig . Hypopharynx as in Fig. 41A View Fig . Labrum with sensory pores along anterior margin only ( Fig. 31G View Fig ). Labial palpi with 3 rd palpomere 1.4–1.8 times longer than palpomere 2. Thorax: Pronotum narrow ( Fig. 15H View Fig ), length to width ratio = 0.79–0.88; ratio of pronotal width to head width = 1.25–1.33; maximum width slightly narrower than elytra at base; punctures separated by average distance subequal to or slightly greater than diameter of a puncture; lateral margins not explanate anterad or posterad lateral fovea; lateral foveae moderately deeply impressed, narrowly separated from lateral margins. Elytra with humeral angles convex; epipleural carina not projecting; 2.0–2.3 times longer than pronotum; apical margins convex. Wings developed or brachypterous. Mesosternum with projecting tooth; longitudinal carina along midline of mesosternum vaguely present, becoming obscured on posterior half ( Fig. 20B View Fig ). Legs: All tibiae evenly pubescent to apex. Metatrochanter without tooth on apical margin. Abdomen: Tergites IV and V with wing-folding spicules very broad, nearly contiguous or contiguous in shape of single transverse band. Apical palisade fringe on tergite VII absent. Aedeagus: Length 0.52–0.63 mm. Median lobe short, oblong, sides subparallel, apex broadly convex. Parameres diverging in basal half (Fig. 21D). Internal sac large; with two mediolateral patches of microspinules.

Type Specimens. Holotype male (UAMObs: Ento:235217) and allotype female (UAMObs: Ento:235837) labeled as follows: WASH, Mt. Rainer N.P., Berkeley Park, 3.5 mi. W.Sunrise,6700’, 8.VIII.1975, J.M. & B.A. Campbell / HOLOTYPE ³ (or ALLOTYPE ♀) Phlaeopterus obsoletus desig. L.J. Mullen and J.M. Campbell, CNC No. 18470 (red label). Both specimens are deposited in the CNC. Paratypes (n = 878) are deposited in the AMNH, BMNH, CAS, CNC, CSCA, FMNH, MCZ, OSAC, and USNM.

Distribution. Phlaeopterus obsoletus is known from the Cascade Range in British Columbia, Oregon, Washington, and California, and from Jasper National Park, Alberta ( Fig. 13A).

Bionomics. Adults have been collected at 1,000–2,130 m elevation during May–August in wet moss at the edges of streams or in the splash zone of waterfalls.

Remarks. Phlaeopterus obsoletus can be distinguished from all other Phlaeopterus species except P. longipennis by the absence of ocelli. Phlaeopterus obsoletus and P. longipennis are very similar but can be differentiated by characters discussed in the Remarks section of the latter species. This species has been misidentified as P. longipennis in most collections as well as by Hatch (1957).

Etymology. This species name is derived from the Latin adjective for effaced or indistinct, referring to the absence of ocelli.

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