Bolitogyrus tortifolius Brunke

Brunke, Adam J. & Solodovnikov, Alexey, 2014, A revision of the Neotropical species of Bolitogyrus Chevrolat, a geographically disjunct lineage of Staphylinini (Coleoptera, Staphylinidae), ZooKeys 423, pp. 1-113 : 39-40

Taxon classification Animalia Coleoptera Staphylinidae

Bolitogyrus tortifolius Brunke sp. n. Figs 1F, 7C, 10C, 19 D–F, 24A, 27A, 30C (map)

Type locality.

Costa Rica, Puntarenas, Monteverde.

Type material.

Holotype ♂ (SEMC): COSTA RICA: Puntarenas, Monteverde, 29-31 June 1992, M.L. Jameson, ex. flight intercept trap [white printed label] / SM0038007 [white barcode label] / Holotype, Bolitogyrus tortifolius Brunke, sp. n. [red printed label].

Paratypes (5 ♂ 1 ♀, SEMC, ZMUC): COSTA RICA: Puntarenas, Monteverde, 1540 m, 'ex. Crepidotus (white)', 6.V.1989, J. Ashe, R. Leschen, R. Brooks, #107, SM0038004, 1 ♂ (SEMC); Monteverde, Cerro Amigos, 1520-1550 m, 6.V.1989, exp. #014, J. Ashe, R. Brooks, R. Leschen, SM0038010, 1 ♂ (SEMC); Monte Verde, 1520 m, exped. flight intercept trap, 21.V.1989, J. Ashe, R. Brooks, R. Leschen, exped. #316, SM0038009, 1 ♂ (SEMC); Monteverde, 1610 m, ex. flight intercept trap, 29.VI.1990, S.E. Roberts, SM0038012, 1 ♂ (SEMC); Monteverde, 1520 m, ex. flight intercept trap, 11.V.1989, J. Ashe, R. Brooks, R. Leschen, exped. #111, SM0038011, 1 ♀ (SEMC); Monteverde Biological Station, 10°19.672'N, 84°49.141'W, 1515 m, cloud forest, ex. flight intercept trap, 10 to 17.VI.2001, S. & J. Peck, 01-10, CR1P01002, SM0551690, 1 ♂ (ZMUC).

Diagnosis.

Within the Bullatus Lineage: two punctures in dorsal row of pronotum (Fig. 7C); dark abdominal segment VIII; humerus with pale marking distinctly narrower than half the distance between scutellum and humeral angle (Fig. 10C); median lobe in lateral view slightly recurved dorsad, usually with a sharp angle at the place of recurvature (Fig. 19E).

Description.

Measurements ♂ (n=5): HW/HL 1.70-1.83; PW/PL 1.56-1.67; EW/EL 1.19-1.27; ESut/PL 0.91-1.00; PW/HW 1.03-1.06; forebody length 3.6-3.8 mm.

Measurements ♀ (n=1): HW/HL 1.68; PW/PL 1.61; EW/EL 1.29; ESut/PL 1.00; PW/HW 1.00; forebody length 3.9 mm.

Coloration: Body dark brown, frons with faint green-blue metallic reflection, pronotum with faint bronze metallic reflection; pronotum with lateral portions broadly paler, reddish-brown; elytra with contrasting, pale yellow to orange areas, humerus with pale crescent-shaped marking on disc, epipleuron broadly paler, usually with dark area in apical two thirds, apex of elytra broadly paler; dorsal abdomen with paratergites usually paler, tergite VII with pale, reddish-orange, semi-circular marking at apex; abdominal sternites III–V or III–VI with a pale, lateral spot at base and at apex; antennomeres I–V yellow-orange, VI–X brown to dark brown, XI distinctly paler, yellow, in some specimens antennomeres I and II slightly paler (yellow) than III–V; procoxa and profemur entirely pale, yellow, meso- and metacoxa darkened, metacoxa dark brown at base, meso- and metafemur with dark subapical band, tibia pale, yellow with darkened lateral face, tarsus pale, yellow brown.

Head with median frontal impression present as a pair of subparallel lines forming the anterior margin of central protuberance; frons relatively smooth, glossy with several coarse, asetose punctures, rarely more heavily sculptured though never rugose; with central protuberance, protuberance smooth, glossy, with several sparsely distributed, asetose punctures; base of head with well-developed posterior protuberances, surface smooth, glossy, with a few coarse, asetose punctures; microsculpture absent dorsally except as broken lines on frons and well-developed, fine lines on temples.

Pronotum with disc smooth, glossy, without or with very few, finely impressed micropunctures; lateral areas with moderately impressed, irregular, asetose punctures, often contiguous; protuberance distinct to pronounced in lateral view, less developed but still distinct in female; with two punctures in dorsal row; scutellum with several coarse, contiguous, deeply impressed, asetose punctures; elytra weakly to slightly transverse, suture shorter to as long as pronotum at midlength; macrosetae of elytra relatively long and erect, distinct from overall surface sculpture in lateral view.

Abdominal tergites with sparse, long and golden setae, III–VI impressed at base; disc of tergites III–VI impunctate medially, this area becoming smaller on successive tergites; sternites III–V with basal transverse line sharply projected posteriad at middle; abdominal sternites with relatively coarse microsculpture, interspaces wider than lines.

Median lobe in lateral view recurved dorsad, sometimes with sharp angle at position of recurvature, apical portion narrowed at this position to acute apex (Fig. 19E); median lobe in parameral view constricted near base, subparallel for most of its length and strongly, asymmetrically constricted into acute apex (Fig. 19D); paramere longer than median lobe, not divided but with median suture; in parameral view, constricted at midlength and then broadly but asymmetrically dilated, narrowed at apex (Fig. 19D); peg setae arranged in a pair of lateral, asymmetrical, longitudinal fields, with one field slightly broader at base relative to the other, about 7 peg setae across at the widest part of each field (Fig. 19F). Male sternite VII shallowly but distinctly emarginate and with glabrous area apicomedially, this area not flattened; male sternite VIII with transverse basal line broken medially, with slightly emarginate apex, impressed and glabrous in triangular area near emargination; male sternite IX distinctly asymmetrical at base, with moderately deep and broad emargination at apex (Fig. 24A).

Female tergite X broad, broadly rounded at obtuse apex, short, about half as long as laterotergal sclerites (Fig. 27A); female laterotergal sclerites not expanded at base and not overlapping with tergite X (c.f. Fig. 26K).

Distribution.

Figure 30C. Known only from Monteverde National Park but may occur elsewhere in the Tilarán Cordillera of Costa Rica.

Bionomics.

Bolitogyrus tortifolius has been collected in May and June, by FITs and on a white Crepidotus sp. fungus. Specimens have been found at elevations of 1515-1610 m.

Etymology.

The species epithet refers to the paramere of the aedeagus, which is similar to a curled leaf.

Comments.

Among species of overlapping distribution, Bolitogyrus tortifolius is most similar in habitus to Bolitogyrus divisus and Bolitogyrus bullatus . It can be easily distinguished by the pronotum with two punctures in the dorsal row. At present, the only male-associated female of Bolitogyrus tortifolius can be distinguished from females of Bolitogyrus pseudotortifolius by the shape of female tergite X, which is wider and more truncate at the apex than in the previous species.