Miscophus volgensis Mokrousov & Proshchalykin, 2025

Miscophus volgensis Mokrousov & Proshchalykin , sp. nov.

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( Figs 54–64 View FIGURES 54–58 View FIGURES 59–64 )

Type material ( 1 ♀, 1 ♂). Holotype — ♀, “АстраханскаЯ обл. / Енотаевский р-н / окр. п. Волжский / N46.965°, E47.53° / 9.VII 2017 Мокроусов // Holotype ♀ Miscophus / volgensis Mokrousov / et Proshchalykin” [ Russia, Astrakhan Province, Enotaevka Distr., near Volzhskiy village , 46.965°N, 47.53°E, 9.VII.2017, M. Mokrousov collector] [ ZISP] GoogleMaps . Paratype: ibid., 08.VII.2017, 1 ♂, M. Mokrousov [ ZISP] GoogleMaps .

Diagnosis. Miscophus volgensis belongs to the M. mimeticus species group, characterized by: female clypeal anterior margin continuous, without indentations; male S 8 in most species with fused medial teeth, split only at the apex. It differs from all species of the group, except M. rufiventris Tsuneki, 1972 , by the legs and metasoma completely ferruginous (in other species at least the legs or metasoma are darkened). Resembling M. rufiventris in color, but differs by he head shape (from the front, the head is widest above the middle in the M. volgensis and near the middle in the M. rufiventris ) and the distance between the antennal sockets is noticeably greater than socket diameter in M. volgensis and near equal in M. rufiventris . The male differs from M. rufiventris by the presence of a median tooth on S8 (tooth lacking in M. rufiventris ).

Description. Midfrontal furrow indistinct. White setation well developed, but not concealing sculpture, almost uniform. Frons with dense punctation, interspaces about punctures diameter; gena with sparser punctures, shiny.

Mesosoma. Shiny, sparsely punctate, white setation well developed, but not concealing sculpture, almost uniform. Pronotal collar distinctly depressed posterolaterally, in middle with triangular, not depressed part. Propodeal enclosure with central keel and oblique rugae, interspaces sparsely punctate and shiny, with white setae not concealing sculpture. Propodeal lateral and posterior surfaces striate, interspaces sparsely punctate and shiny, with white setae not concealing sculpture.

Metasoma. Faintly shiny, with apical tomentum on T 1–4 (inconspicuous in female).

Coloration. Head and metasoma predominantly black with reddish clypeal apex, mandible (except amber apex), scape and pedicel (darkened above), flagellomeres below (in female only basally); pronotal tubercle and tegula pale yellow. Legs (except coxal base) and metasoma completely reddish. Wing venation pale yellow.

Female ( Figs 54–58 View FIGURES 54–58 ). Body length 7.0 mm.

Head ( Figs 56–57 View FIGURES 54–58 ) ratio H:W = 0.85, ratio POL:OOL = 2.20. Ratio head height to maximal frons width = 1.76. Clypeal anterior margin continuous, slightly concave laterally ( Fig. 56 View FIGURES 54–58 ).

Legs. Forebasitarsus with four spines, apical one slightly longer than second tarsomere ( Fig. 58 View FIGURES 54–58 ).

Male ( Figs 59–64 View FIGURES 59–64 ). Body length 6.2 mm.

Head ( Figs 60–61 View FIGURES 59–64 ) ratio H:W = 0.79, ratio POL:OOL = 2.34. Ratio head height to maximal frons width = 1.62.

Legs. Forebasitarsus with three thin spines, apical one approximately equal to half of second tarsomere.

Metasoma. S8— Fig. 62 View FIGURES 59–64 .

Genitalia. Paramera— Fig. 63 View FIGURES 59–64 ; penial valvula— Fig. 64 View FIGURES 59–64 .

Etymology. Toponym, a derivatives from the Lower Volga River region—the type locality of the species.

Distribution. Russia ( Astrakhan Province).