Boreoheptagyiini Brundin

Makarchenko, Eugenyi A., Semenchenko, Alexander A. & Palatov, Dmitry M., 2020, Review of the genus Shilovia Makarchenko (Diptera: Chironomidae: Diamesinae Boreoheptagyiini) from the mountains of Central Asia, with morphological description and DNA barcoding of known species, Zootaxa 4895 (2), pp. 196-210 : 198-199

Key to genera of the tribe Boreoheptagyiini Brundin

Adult males

1. Antenna with 5–13 flagellomeres, covered with long or short setae and with reduced plume. Acrostichals long, beginning near antepronotum and extending to near scutellum; dorsocentrals long, in 1–3 rows or in 2 groups, 1 near scutellum and 1 on humeral area, or with 1 group dorsocentrals reduced to 2–3 setae in anterior position, near to humeral area, in a large white spot. Aedeagal lobe membraneous, sometimes with spines or setae. Gonocoxite simple with flat median field or with strong basal lobe; stemapodeme narrow, rectangular or triangular. Gonostylus with apical megaseta and megasetae sometimes present on inner margin …................................................................... Boreoheptagyia Brundin

– Antenna with 5–7 flagellomeres, covered only with short setae and with reduced plume. Acrostichals and dorsocentrals short, arrangement of these setae on the mesonotum is different. Gonocoxite with or without basal lobe; sternapodeme different shape. Aedeagal lobe weakly or strong sclerotized, another shape and with different structure. Gonostylus different shape and structure … ................................................................................................. 2

2. Scape of antenna with some setae. Antenna with 7 flagellomeres. Acrostichals beginning near antepronotum and reaching middle of mesonotum. Anal-lateral corners of tergite IX mostly elongated back in form of narrow lobes; anal point present and like small rounded protuberance. Gonostylus scoop-shaped; inner lobe along the margin with 5–9 megasetae and one subterminal tooth; outer lobe widely triangular, inner margin of which with strong setae, outer half with thinner and longer setae. Sternapodeme long, almost trapezoidal, with rounded apex ( Makarchenko et al. 2020a, Figs. 1–9 ).. Kaluginia Makarchenko

– Scape of antenna bare. Antenna with 5–6 flagellomeres. Acrostichals beginning near antepronotum, extending to near scutellum; dorsocentrals situated only in anterior part of mesonotum in two groups or in 2–4 rows, in anterior part of mesonotum reaching or not reaching of preanal setae, and in posterior part they are converge or not converge with acrostichal setae. Tergite IX different shape, without anal point. Gonostylus and sternapodeme different shape and structure ….................. 3

3. Antenna with 5 flagellomeres. Dorsocentrals situated only in anterior part of mesonotum in two groups: setae of first group anteriorly of humeral pit or just posterior to antepronotum and setae of second group in humeral area, posteriorly of humeral pit. Postnotum densely covered with aculeiform macrotrichia. Gonocoxite with median volsella, which in basal part bears short lobe. Aedeagal lobe strongly sclerotized with a complex structure, that is, as if several details be glued together in the dorso-ventral direction, with rounded lobe in inner side and with nose or beak shaped apex. Gonostylus with wide basal part, gradually tapering to a rounded apex, with several megasetae in subapical part ( Makarchenko et al. 2020b, Figs. 1–14 ) …................................................................................. Palatovia Makarchenko et Semenchenko

– Antenna with 5–6 flagellomeres. Dorsocentrals in 2–4 rows, in anterior part of mesonotum reaching or not reaching of preanal setae, and in posterior part they are converge or not converge with acrostichal setae. Postnotum without aculeiform macrotrichia but sometimes with setae ( Fig. 13 ). Gonocoxite without median volsella, with long apical projection (“heel”) which densely covered with long and thin setae ( Figs. 14 , 19–20 ); this “heel” posterior to gonostylus 0.35–0.63 times as long as gonostylus. Aedeagal lobe weakly sclerotized, apical part hooked or fingelike ( Figs. 25–27 ). Gonostylus simple, almost straight or curved in middle or in distal part, apically with tooth and short megaseta ( Figs. 21–23 )................… Shilovia Makarchenko

Figures

FIGURES 1–9. Shilovia rara Makarchenko, male. 1, head; 2, legs; 3, basal part of wing; 4, antepronotum and mesonotum, dorsal view; 5, sternapodeme and inferior volsella; 6, antenna; 7, distal part of gonostylus; 8–9, hypopygium in dorsal view. 1–2, 7, 9, male from Kyrgyzstan; 3–6, 8, male from Tajikistan (holotype). P1– fore leg, P2 – mid leg, P3 – hind leg.

FIGURES 10–15. Shilovia xinhuawangi sp. nov., male. 10, basal part of wing; 11, antenna; 12, dorsal part of mesonotum; 13, scutellum and postnotum; 14, hypopygium in dorsal view; 15, hypopygium without tergite IX in dorsal view.

FIGURES 16–20. Shilovia xinhuawangi sp. nov. (16) and S. yakovlevi sp. nov. (17–20), males. 16, legs; 17, basal part of wing; 18, dorsal part of mesonotum; 19, gonocoxite and gonostylus; 20, part of hypopygium in dorsal view. Designations are the same as in Figures 1–9.

FIGURES 21–27. Shilovia rara Makarchenko (21, 24–25), S. xinhuawangi sp. nov. (22, 27) and S. yakovlevi sp. nov. (23, 26), males. 21–23, gonostylus; 24, inferior volsella and basal lobe of gonocoxite; 25–27, sternapodeme, phallapodeme and aedeagal lobe. Scale bars: 50 µm.