Scathophaga ferganensis Ozerov et Krivosheina, 2024

Ozerov, A. L. & Krivosheina, M. G., 2024, A new species of Scathophaga Meigen, 1803 (Diptera: Scathophagidae) from Kyrgyzstan, Far Eastern Entomologist 497, pp. 1-5 : 2-5

Scathophaga ferganensis Ozerov et Krivosheina , sp. n.

https://zoobank.org/NomenclaturalActs/ 391A1105-077E-411E-89B2-BDCD56445FF8

Figs 1–5

MATERIAL. Holotype – ♂, Kyrgyzstan, N slope of the Ferghana Ridge , 40 km W of Chatyr-Köl Lake, 2800 m (ca. 40.772º N 74.770º E), 22.VII.1966, coll. V. Zaitsev [labelled "N скл. Ферг. хр. 40 км W оЗ. Чатыркёль 2800 В. Зайцев 22 VII 966"].

DESCRIPTION. MALE. Head. Frontal vitta yellow in lower third and black in upper part, delicately whitish dusted; face and gena yellow, whitish dusted; frontoorbital plate, ocellar triangle, and postcranium blackish, greyish dusted. Setae: 3 orbitals, 4–5 frontals, 1 ocellar, 1 postocellar, 1 inner vertical, 1 outer vertical; 1 pair of strong vibrissae and 2 pairs of subvibrissae present. Postcranium covered with white hairs. Antenna black; postpedicel about twice as long as wide; arista black, bare. Palpus reddish yellow with darkened apex, filiform, without long apical seta.

Thorax. Completely black, densely pale grey dusted. Acrostichals not differentiated from the other hairs on scutum, 2 postpronotals, 2 notopleurals, 1+2 supra-alars, 1+1 intra-alars, 2 postalars, and 2+3 dorsocentrals. Proepisternum centrally and ventrally with whitish hairs, without strong setae ventrally. Proepimeron covered with whitish hairs anteriorly. Anepisternum covered with hairs completely and with 2–3 strong setae along posterior margin. Katepisternum covered with hairs completely, with one strong seta in posterodorsal corner. Postmetacoxal bridge absent. Scutellum greyish dusted, covered with hairs dorsally and with a pair of strong basal scutellar and a pair of strong apical scutellar setae.

Legs. All coxae black, greyish dusted. All femora black, greyish dusted. All tibiae and tarsi yellow, each tarsus darkened dorsally at apex. Fore femur covered with whitish and blackish hairs, without striking setae. Fore tibia with a row of posterodorsal setae, with 2 dorsal, 1–2 posterior, 1 preapical anterodorsal, 1 apical posterodorsal, 1 apical posterior setae. Mid femur with a row of anterodorsal thin setae, with 1 preapical posterodorsal and 1 preapical posterior setae. Mid tibia with 2 anterodorsal, 2 posterodorsal, and 1–2 posterior setae, also with a ring of apicals. Hind femur with a row of dorsal/ anterodorsal thin setae. Hind tibia with 2–3 posterodorsal, 2–3 anterodorsal, 1 preapical dorsal, 1 preapical anterodorsal, and 2 apical anteroventral setae.

Wing tinged with brownish, veins brownish. Calypteres, including margins, yellowish. Halter yellow.

Abdomen black, greyish dusted, covered with hairs. Male sternite 4 roundish, a little longer than wide ( Fig. 2 ). Male sternite 5 with short lobes ( Fig. 1 ). Cercal plate equal to surstyli ( Figs 4, 5 ). Aedeagus as in Fig. 3 .

MEASUREMENTS. Length of body 5.0 mm. Length of wing 5.2 mm.

FEMALE. Unknown.

COMPARISONS. The new species resembles Scathophaga lapponica (Ringdahl, 1920) by external characters and in the structure of the genitalia. These species can be distinguished from each other as follows:

1. Femora of mid and hind legs completely black; palpus reddish yellow with darkened apex; male sternite 4 as in Fig. 2 ; lobes of male sternite 5 shorter ( Fig. 1 ); aedeagus as in Fig. 3 ; cercal plate, surstyli and aedeagus as in Figs 4, 5 ............................... S. ferganensis sp. n.

– Femora of mid and hind legs yellow apically; palpus reddish yellow completely; male sternite 4 as in Fig. 7 ; lobes of sternite 5 longer ( Fig. 6 ); aedeagus as in Fig. 8 ; cercal plate, surstyli and aedeagus as in Figs 9, 10 ................................. S. lapponica (Ringdahl)

Figures

Figs 1–5. Scathophaga ferganensis, sp. n., male: 1 – abdominal sternite 5; 2 – abdominal sternite 4; 3 – aedeagus; 4 – epandrium, cercal plate and surstyli, dorsal view; 5 – same, lateral view.

Figs 6–10. Scathophaga lapponica (Ringdahl), male: 6 – abdominal sternite 5; 7 – abdominal sternite 4; 8 – aedeagus; 9 – epandrium, cercal plate and surstyli, dorsal view; 10 – same, lateral view.