Gyrophaena aryanamensis Enushchenko, 2019

Enushchenko, Ilya V., 2019, Review of the subtribe Gyrophaenina Kraatz 1856 (Coleoptera: Staphylinidae: Aleocharinae: Homalotini) of Middle Asia, with emphasis on the fauna of Kazakhstan, Zootaxa 4613 (2), pp. 379-397 : 387-388

Gyrophaena aryanamensis Enushchenko , sp. nov.

( Figs. 34–40 )

Type material examined: Holotype [The specimen was reglued on a white rectangular plate; a plastic plate with a preparation of the aedeagus, VIII male tergite and sternite in Canada balsam] ♂: ‘50. ТАДЖИКИСТАН | Шарак, в грибе | 10.V.1969. В. Янушев [50. TAJIKISTAN | Sharak [N 38°42’11.160’’, E 70°30’43.920’’, h= 1625 m], in mushroom | 10.V.1969, V.[V.] Yanushev]’ <handwritten label>, ‘ HOLOTYPE | Gyrophaena | aryanamensis sp.n. | Enushchenko I.V. | 2019 des.’ <red printed label>’ (ZMM) .

Paratypes: KYRGYZSTAN: 25 ♂♂, 13 ♀♀: ‘ KYRGYZSTAN, Dzalal- | Abad Area , Chatkalskiy | distr.[ict], Dzhany-Bazar, | 41°40,261’ N, | 70°49,053’ E, 08.VI.2016, | Palatov D.M. leg.’ <white printed labels >, ‘ PARATYPE | Gyrophaena | aryanamensis sp.n. | Enushchenko I.V. | 2018 des.’ <red printed label>’ ( ZMM: 4 ♂♂, 2 ♀♀; ZIN: 2 ♂♂, 2 ♀♀; MZHF: 2 ♂♂, ♀♀; NHMW: 2 ♂♂, 2 ♀♀; FMNH: 4 ♂♂, 2 ♀♀; cIE: 13 ♂♂, 5 ♀♀) ; TAJIKISTAN: Kuhistoni Badakhshon Area: 4 ♂♂, 7 ♀♀ [The specimens was reglued on a white rectangular plate; a plastic plate with a preparation of the aedeagus in Canada balsam; labels scanned and printed]: same data as the holotype , ‘ PARATYPE | Gyrophaena | aryanamensis sp.n. | Enushchenko I.V. | 2019 des.’ <red printed label>’ ( ZMM: ♂, 2 ♀♀; ZIN: ♂, ♀♀; NHMW: ♂, 2 ♀♀; cIE: 2 ♂♂, 2 ♀♀) .

Description. Body somewhat subparallel, yellow-brown to dark-brown; body length 1.86–2.28 mm. Habitus as in Fig. 34 . Head dark-brown to black; pronotum slightly paler than head, red-brown to dark-brown; disc of elytra golden-brown with shoulders and posterolateral portions dark-brown to black; abdomen dark-brown or yellowbrown to red-brown except of abdominal segments V–VI dark-brown to black; antennomeres 1–3 yellow-brown, remaining antennomeres darkish-brown; mouthparts brown; legs yellow-brown to red-brown. Body with distinct reticulate microsculpture. Head 1.3 times as wide as long, with distinct reticulate microsculpture and groups of large (about 0.02 mm diam.), distinct punctures in lateroposterior portions of head behind eyes; middle portion impunctate. Antennomeres 1–3 elongate, antennomere 4 trapezoidal to subquadrate, antennomeres 5–10 slightly transverse, 1.5 times as wide as long; apical antennomere elliptic to ovoid, 1.2 times as long as wide. Pronotum with distinctly narrowing anterior angles, 1.5 times as wide as long and 1.35 times as wide as head; microsculpture as that on head, with numerous small (about 0.01 mm diam.) and scattered punctures, not forming longitudinal rows, and two large (0.03 mm diam.) median punctures near base of head; basal portion of pronotum with weakly defined punctation. Elytra about twice as wide as long, 1.3 times as wide as pronotum, with distinct reticulate microsculpture; each elytron with oblique rows of tubercles (distance between each of them 0.01–0.04 mm) stretching from posterior angles to shoulders; median area without tubercles. Microsculpture of abdomen distinctly weaker than on other parts of body.

Male. Abdominal tergite VII with two round median tubercles and longer, almost parallel, elongated lateral elevations from each sides of median tubercles. Apical margin of abdominal tergite VIII with four teeth rather equal in length: two widely separated, stout and slightly curved inwards lateral teeth and two moderately small, straight medial teeth ( Fig. 38 ); sometimes one of them may be reduced as in Fig. 36 . Ventral plate of aedeagus rather short, wide and blunt apically, with somewhat long and curved apical projection; lower edge of ventral plate distinctly angled ( Figs. 35, 37 ); dorsal projection of internal sac approximately as long as ventral plate, bent dorsally, regularly elongate and sharply widening to apex.

Female. Surface of abdominal tergite VII rather flat, with several small round tubercles along apical margin; tergite VIII truncate apically, rather narrowly trapezoid ( Fig. 39 ); sternite VIII rather narrowly rounded, more or less ovoid apically ( Fig. 40 ).

Comparative notes. In the coloration and microsculpture of the body, the general shape of the aedeagus, and the male abdominal tergite VIII, G. aryanamensis sp.nov. is similar to G. hochhuthi Bernhauer 1908 ( Figs. 41–49 ), from which it can be distinguished by the irregular punctation of the pronotum (punctures on the pronotum of G. hochhuthi forming longitudinal rows), features of the elytral microsculpture, details of the structure of the aedeagus and the shape of the male abdominal tergite VIII (see the key below). Based on the shapes of the antennomeres, the arrangement of pronotal and elytral punctures and microsculpture, as wel1 as on the structure of the aedeagus and the male tergite VIII, G. aryanamensis sp. nov. belongs to the laetula species group, established by Seevers (1951). This Holarctic group contains the North American G. laetula Casey 1906 and six Euroasiatic species: G. congrua , G. hanseni A. Strand 1946 , G. hochhuthi , G. minima Erichson 1837 , G. munsteri A. Strand 1935 and G. poweri Crotch 1865 . For illustration of these species see Klimaszewski et al. (2009: Figs. 46 –52) and Enushchenko & Semenov (2016: Figs. 11–14 , 21–24, 40–42, 43–45, 55–57).

Etymology. The name is derived from ‘ Aryânam Vaeja ’ (ancient Iranian ‘ aryanam ’ and Avesta ‘ airyanam ’ (Aryan land)), as ancestors of native Tajiks called their country.

Remark. It was collected in Kyrgyzstan (Dzhany Bazar) in mushrooms together with G. hochhuthi .

Figures

FIGURES 34–38. Gyrophaena aryanamensis, sp. nov. (Figs 34: Holotype, TAJIKISTAN, Sharak; 35–38: Paratype, KYR- GYZSTAN, Dzhany-Bazar): 34—habitus, dorsal view, 35, 37—aedeagus, lateral view, 36, 38—male abdominal tergite VIII, dorsal view. Scale bars: 1 mm (34), 0.1 mm (35–38).

FIGURES 39–46. Gyrophaena aryanamensis, sp. nov. (Figs. 39, 40: KYRGYZSTAN, Dzhany-Bazar) and Gyrophaena hochhuthi Bernhauer (Figs. 41–46: KYRGYZSTAN, Dzhany-Bazar): 41—habitus, dorsal view, 42—aedeagus, lateral view, 43, 44—male abdominal tergite VIII, dorsal view, 39, 45—female abdominal tergite VIII, dorsal view, 40, 46—female abdominal sternite VIII, dorsal view. Scale bars: 1 mm (41), 0.1 mm (39, 40, 42–46).

FIGURES 7–12. Encephalus angusticollis J. Sahlberg: 7 (type of E. torosus Eppelsheim, male), 10 (type of E. torosus Eppelsheim, female)—habitus, dorsal view, 11—habitus, frontal view (female), 8—aedeagus, lateral view, 9—labels of type of E. torosus Eppelsheim, male, 12—labels of type of E. torosus Eppelsheim, female. Scale bars: 1 mm (7, 10, 11), 0.1 mm (8).

FIGURES 13–16. Gyrophaena kangasi Rutanen (Holotype): 13—habitus, dorsal view, 14—aedeagus, lateral view, 15—male abdominal tergite VIII, dorsal view, 16—labels of the holotype. Scale bars: 1 mm (13), 0.1 mm (14, 15).