Malthinus (Indomalthinus) qinlingensis Kazantsev 2025, sp. n.

Malthinus (Indomalthinus) qinlingensis Kazantsev, sp. n. https://zoobank.org/NomenclaturalActs/ B6EC5F80-659E-4323-A410-A00B13F5B1D7 Figs 1–6 TYPE MATERIAL. Holotype – ♂: China: “C China: Shaanxi, Qinling Mts, 6 km E Xunyangba, 1000–1300 m, 23.V–13.VI 2000, C. Holzschuh leg.” (Insect Center, Moscow); Paratypes: 1 ♂ and 2 ♀, same labels (Insect Center, Moscow). DESCRIPTION. MALE. Testaceous; head behind antennal insertions, antennae, except antennomeres 1–2, broad pronotal median stripe, tibiae medially and tarsi dark brown (Fig. 1). Head transverse, without eyes about as wide as pronotum. Eyes small, spherical, interocular distance ca 2.3 times greater than eye diameter in dorsal view. Vertex densely and finely punctuate. Ultimate maxillary and labial palpomeres narrow, noticeably longer than wide. Antennae filiform, attaining to elytral three fourths; antennomere 3 ca 1.3 times longer than pedicel (antennomere 2) and subequal in length to antennomere 4; antennal pubescence moderately long and sub-erect (Fig. 1). Pronotum transverse, ca 1.1 times wider than long, gradually widened anteriorly, laterally concave near posterior and anterior angles, anteriorly convex, posteriorly slightly medially concave; with distinct discal ribs forming elongate median areole in anterior half and transverse rectangular areole in posterior third. Elytra elongate, ca. 3.3 times longer than wide at humeri, parallel-sided, completely covering abdomen and folded wings; elytral punctures arranged in inconspicuous rows, more noticeable near suture; elytral pubescence uniform, short and sub-erect. Scutellum narrowing distally, broadly rounded at apex. Legs long and slender; femurs and tibiae straight and narrow, subequal in length; posterior trochanter small, elongate; hind coxae small, transverse, without distal process; hind tarsomeres length ratio: 4.4: 2: 1; 1; 1.6 (Fig. 1). Ultimate ventrite large, elongate, oval, feebly emarginate medially at apex; ultimate tergite transverse, gradually narrowing and rounded distally. Aedeagus elongate, sub-rectangular in distal two thirds, with short robust laterophyses, just attaining to the middle, crossed and moose horns-shaped distally, sub-quadrate ventral plate, and elongate and strongly curved in lateral view median piece, split at apex and provided with lateral teeth before distal third and crescent-shaped (in lateral view) distal process (Figs 3, 4). Body length (from head to apices of elytra): 5.2–5.4 mm; width (at humeri): 1.2–1.3 mm. FEMALE. Similar to male, but larger (body length: 6.6–7.4 mm; width: 1.6–1.7 mm), with relatively shorter antennae and elytra; head below and laterally behind eyes testaceous (Fig. 2). Ultimate ventrite transverse, conspicuously emarginate medially, with distally acute median process, attached proximally to the inner side of the ventrite; ultimate tergite trapezoidal, triangularly incised at distal margin; proximal part of coxites horizontal, transverse, medially little produced, distal part relatively short, oval; paraprocts straight at sides, triangular at apices; proctiger transverse, almost truncate at apex (Figs 5, 6). DIAGNOSIS. Malthinus (Indomalthinus) qinlingensis sp. n. differs from all known species of the subgenus by the sub-quadrate ventral plate of the aedeagus and distally widening, moose horns-shaped laterophyses (Figs 3, 4); it may also be distinguished from M. (I.) dirangensis Kopetz, 2015, the only other Indomalthinus with crossed at apices laterophyses of the aedeagus, by the bicoloured pronotum, dark at disc and testaceous at sides (Figs 1, 2). By the structure of the female ultimate ventrite (sternite 8), with distally acute median process (Fig. 6), M. (I.) qinlingensis sp. n. resembles M. (I.) tantricus Brancucci, 1978 from Darjeeling, easily distinguishable by the testaceous anteriorly head and bicoloured pronotum, as well as by the details of the aedeagus. DISTRIBUTION. Shaanxi, China. ETYMOLOGY. The new species is named after the mountains where the new species was collected.