Caloboreaphilus concisus, Shavrin & Smetana, 2020

Shavrin, Alexey V. & Smetana, Aleš, 2020, New species and records of Coryphiini from China (Coleoptera: Staphylinidae: Omaliinae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 60 (2), pp. 591-598 : 594-597

Caloboreaphilus concisus sp. nov.

( Figs 14–27 )

Type locality. China, Sichuan, 23 km E of Songpan, 32°37′47″N, 103°49′25″E, 3826 m a.s.l.

Type material. Hඈඅඈඍඒඉൾ: J, ‘ CHINA: Sichuan, 23 km | E Songpan, N32°37’51’’ | E103°49’25’’, 27.V.2012 | 3839m, sifting 11, | V. Grebennikov || HOLOTYPE | Caloboreaphilus | concisus sp.n. | Shavrin A. & Smetana A.des. 2020 [red rectangular label, printed]’ ( CNC). Pൺ*©ൺඍඒඉൾඌ: 2 JJ (one specimen dissected), same data as the holotype (1 J: ASCD, 1 J: CNC); 1 ♀, ‘ CHINA, Sichuan, 23km | E Songpan, N32°37’42’’ | E103°50’08’’, 26.v.2012, | 3860m, sifting 10, | V. Grebennikov’ ( CNC); 1 J, ‘ CHINA: Sichuan, 23 km | E Songpan, N32°37’47’’ | E 103°49’25’’, 28.V.2012 | 3826m, sifting 14. | V.Grebennikov’ ( CNC); 1 J (dissected), 5 ♀♀, ‘ CHINA, Sichuan, 23km | E Songpan, N32°37’57’’ | E103°49’20’’, 27.v.2012, | 3761m, sifting 12, | V. Grebennikov’ (1 ♀: ASCD, 1 J 4 ♀♀: CNC). All paratypes with additional red rectangular printed label: ‘ PARATYPE | Caloboreaphilus | concisus sp.n. | Shavrin A. & Smetana A. des. 2020’.

Description. Measurements (n = 11, in mm): HW: 0.75– 0.97; HL: 0.57–0.75; AL (holotype): 1.25; OL: 0.17–0.20; LT: 0.25–0.30; PL: 0.52–0.62; PW: 0.68–0.92; ESL: 0.93– 1.15; EW: 1.06–1.40; AW: 1.17–1.60; MTbL (holotype): 0.82; MTrL (holotype): 0.49 (MTrL 1–4: 0.32; MTrL 5: 0.17); AedL: 0.80–0.82; TL: 3.50–4.40 (holotype: 4.10).

Forebody reddish-brown, sometimes with darker indistinct spot in middle of head, paler basal margin of pronotum, lateral and basal margins of elytra; middle portion of head (ventrally), thoracic sclerites (ventrally) and abdomen brown, with yellow-brown paratergites and intersegmental membranes between tergites III–VI; mouthparts, legs and antennomeres yellow to yellow-brown. Body shiny, without microsculpture, except of scutellum with fine transverse meshes in middle and abdomen with dense, indistinct or distinct, transverse meshes between punctures. Body covered by dense semierect setae, sparser and longer on anterior portion of head and somewhat finer on abdomen. Habitus as in Fig. 15 .

Head large and convex, 1.2–1.3 times as broad as long, slightly broader than pronotum, with evenly elevated middle portion and distinctly elevated supra-antennal prominences; basal portions of clypeus with very deep narrow impressions; mediobasal margin of head deeply, subtriangularly or semicircularly concave. Punctation very dense and moderately deep, sparser in medioanterior portion, denser in middle and around eyes. Temples distinctly longer than length of eyes, convex. Ocelli large, convex, situated significantly behind level of posterior margins of eyes, distance between ocelli about twice as long as distance between ocellus and posterior margin of eye. Eyes small, strongly convex. Neck with dense and fine microreticulati- on, without visible punctures. Labrum transverse, with three latero-apical and two apical long setae ( Fig. 16 ). Mandible as in Fig. 18 . Mentum large, trapezoidal, with rounded laterobasal margins, strongly narrowed apicad; labium narrow, with elongate labial palpomeres, apical palpomere narrow, about as long as preapical palpomere, glossa narrow, strongly protruded apicad ( Fig. 17 ). Preapical palpomere of maxillary palp wide, club-like, slightly longer than preceding palpomere; galea moderately narrow; lacinia moderately narrow, slightly longer than galea, with elongate spine- like apex, five long preapical spines and long setae along medial margin ( Fig. 19 ). Antenna exceeding basal third of elytra when reclined, with shortened antennomeres IV–IX; antennomeres IV–X covered by dense pubescence; basal antennomere wide, 1.6 times as long as II, antennomere II ovoid, III about as long as and indistinctly narrower than II, IV short, about as long as broad, V–VI slightly broader than IV, VII–VIII slightly transverse, IX–X indistinctly longer than VIII, apical antennomere about twice as long as X, with conical apex.

Pronotum 1.3–1.4 times as broad as long, significantly convex in middle, with deep and wide medial impression, stretching from about apical margin toward middle, and with moderately deep transverse or semicircular impression in mediobasal third, mediolateral portions with very wide and deep depressions; pronotum widest at anterior third, significantly narrowed posteriad toward widely rounded hind angles; latero-apical portions widely rounded; apical margin rounded, distinctly narower than widely rounded posterior margin; lateral edges with regular rounded crenulation, distinctly larger on latero-apical and finer on latero-basal margins. Punctation denser and coarser than that on middle of head, sometimes more irregular and sparser on bottom of medioapical and mediobasal impressions, distance between punctures in middle usually about length of nearest puncture.

Scutellum large, with rounded apex and indistinct semicircular impression in middle, with several small punctures.

Elytra convex, short, 1.7–1.8 times as long as pronotum, about as long as wide or slightly wider, gradually widened apicad, reaching apical margin of abdominal tergite IV or basal margin of abdominal tergite V; apical margin straight; lateral portions narrowly flattened, with bordered margins; laterobasal margins with fine acute crenulation. Punctation slightly sparser and larger than that on pronotum, denser and coarser in basal portions near scutellum. Wings fully developed.

Metatarsus about 1.6 times as long as metatibia; apical metatarsomere about as long three preceding tarsomeres.

Abdomen distinctly wider than elytra, with fine and dense punctation, with wide transverse wing-folding spots in middle of tergite IV and small, rounded, sometimes indistinct spots in middle of tergite V; apical margin of tergite VII with very fine palisade fringe.

Male. First four protarsomeres slightly widened. Apical margins of abdominal tergite VIII ( Fig. 22 ) and sternite VIII ( Fig. 24 ) sinuate.Abdominal sternite IX as in Fig. 23 . Aedeagus ( Fig. 20 ) long, with median lobe gradually narrowing toward acute apex; parameres narrow, cylindrical, reaching apex of median lobe, with two minute apical and three fine lateral setae along inner edge; internal sac long, moderately wide, with apical field of moderately large and two basal fields of finer spiculae. Aedeagus laterally as in Fig. 21 .

Female. First four protarsomeres narrow.Apical margins of abdominal tergite VIII ( Fig. 25 ) and sternite VIII ( Fig. 26 ) obtusely triangular. Genital segment ( Fig. 27 ) with long gonocoxites and elongate styli, each with long apical seta. Differential diagnosis. Caloboreaphilus concisus sp. nov. can be easily distinguished from C. hammondi by the larger body, wider head, larger crenulation of lateral sides of the pronotum, shorter elytra, wider abdomen, the shape of the narrower median lobe (asymmetrical in C. hammondi ) and different structure of the internal sac.

Etymology. The specific epithet is the Latin adjective concisus , - a, - um (short). It refers to the short elytra of the species

Habitat. Specimens were collected by sifting forest litter at elevations from 3761 to 3860 m a.s.l.

Distribution. The species is known from several locations close to each other in northern Sichuan, China ( Fig. 14 ).

Figures

Figs 11–14. Boreaphilus japonicus Sharp, 1874 (Figs 11–13) and map of distribution of Coryphiini in China (Fig. 14). 11 – habitus; 12 – labrum, dorsal view.13 – aedeagus, parameral view (internal sac is not shown); 14 – map: Archaeoboreaphilus paradoxus sp. nov. (black circle), Boreaphilus japonicus (white circles), Caloboreaphilus hammondi Zerche, 1990 (black star), C. concisus sp. nov. (white star), Coryphium taibaiense Li, Li & Zhao, 2007 (black square), C. tangi Li, Li & Zhao, 2007 (white square), Haida argonautarum Smetana, 2003 (black diamond), H. satoi Smetana, 2003 (white diamond). Scale bars: 1.0 mm (Fig. 11); 0.1 mm (Figs 12–13).

Figs 15–27. Caloboreaphilus concisus sp. nov. 15 – habitus (paratype); 16 – labrum, dorsal view; 17 – labium and mentum, ventral view; 18 – left mandible, dorsal view; 19 – left maxilla, ventral view; 20 – aedeagus, parameral view; 21 – aedeagus, lateral view; 22 – male abdominal tergite VIII, dorsal view; 23 – male abdominal sternite IX, ventral view; 24 – male abdominal sternite VIII, ventral view; 25 – female abdominal tergite VIII, dorsal view; 26 – female abdominal sternite IX; 27 – female genital segment, dorsal view. Scale bars: 1.0 mm (Fig. 15); 0.1 mm (Figs 16–27).