Allodia himalayensis Magnussen

Magnussen, Trude, Soli, Geir E. E. & Kjaerandsen, Jostein, 2019, Allodia Winnertz from the Himalayas, with nine species new to science (Diptera, Mycetophilidae), ZooKeys 820, pp. 119-138 : 127-129

Allodia himalayensis Magnussen sp. n. Fig. 3A

Diagnosis.

The narrow, elongated dorsal lobe of the gonostylus, together with the triangular-shaped median lobe makes this species separate from other described Allodia species. In addition, the basal part of the gonostylus is thick and slightly elongated.

Type locality. NEPAL: Province no. 1 (Sagarmatha Zone), Solukhumbu District, Tragdobuk, 2950-3180 m a.s.l.

Type specimens. Holotype: male. 2 printed labels: (E. NEPAL) Tragdobuk (2950-3180m) 15. viii. 1981 J. Emoto leg. / TSZD-JKJ-104953 (KUEC, pinned with genitalia in separate microvial). Paratypes: NEPAL: Same data as for holotype, TSZD-JKJ-104956, male (TMU); NEPAL: Province no. 1 (Kosi Zone), Sankhuwasabha District, Salpa La, 27°27'N, 086°55'E, 3000-3200 m a.s.l, 23 Jul 1981, Leg. J. Emoto, TSZD-JKJ-104954, male (KUEC), TSZD-JKJ-104955, male (KUEC); NEPAL: Province no. 3 (Sagarmatha Zone), Junbesi Khola, 27°36'N, 086°33'E, 3400-3500 m a.s.l, 12 Aug 1981, Leg. J. Emoto, TSZD-JKJ-104957, male (KUEC).

Description.

Body length 3-3.3 mm; wing length 2.6-3.0 mm. Colouration. Head and clypeus brown. Mouthparts and palpomeres yellow. Antennae brown, with scape, pedicel and basal half of first flagellomere yellow. Scutum brown, with broad yellow lateral area, from humerus towards wing base. Lateral sclerites brown. Wings clear without markings. Halteres yellow. Legs yellow. Abdomen brown, tergites II-IV with yellow lateral area, larger towards posterior margin. Terminalia yellow. Head. Three ocelli present, median ocellus smaller than laterals, lateral ocelli touching eye margin. Head covered with fine trichia, except for longer setae near eye margin and between eyes. Antennae almost twice as long as thorax. Scape and pedicel with several setae on distal third. Flagellomeres cylindrical, densely clothed with fine trichia. First flagellomere approx. twice as long as pedicel. Thorax. Antepronotum with five long setae. Scutum covered with uniform small, pale setae; strong prealar and postalar setae. Discal bristles absent. Scutellum with two strong bristles. Lateral sclerites bare. Legs. All tibiae with short setae arranged in rows. Mid tibia with four long anterodorsal and 23 short posterodorsal bristles. Hind tibia with five strong anterodorsal and six strong posterodorsal bristles. Wings. Sc short, ending in R. Length of rm almost twice as long as length of posterior fork. Base of anterior fork before base of posterior fork. R1 and R5 with setae. Male terminalia. Tergite IX medially divided, each part rounded, covered with minute trichia, one short and one long apical bristle. Hypandrial lobe heavily sclerotised and elongated. Gonostylus with dorsal lobe straight, long and slender, posteriorly blunt, pointed posterodorsally; outer surface with multiple long setae. Median lobe sub-triangular, posterior margin slightly serrated with several long and few shorter setae, distinctly prolonged porsterodorsally; ventral margin with one long seta. Ventral lobe of gonostylus nearly club-shaped, with several long setae apically. Basal part of gonostylus large, rounded, with broad protuberance bearing numerous short setae distally. Internal part of gonostylus without projecting process.

Etymology.

Named after the Himalayan mountain region of the type locality.

Remarks. Allodia himalayensis is superficially similar to A. thudamensis , but the dorsal lobe of the gonostylus is much more elongated, and narrower, than in A. himalayensis . There is also a certain similarity to A. ornaticollis (Meigen, 1818), but A. ornaticollis has a projecting spike from the internal part of the gonostylus, which is absent in A. himalayensis .