Phaonia juglans, Sorokina, Vera S., 2015

Sorokina, Vera S., 2015, New species of the genus Phaonia R. - D., 1830 (Diptera, Muscidae) from Central Asia, Zootaxa 4013 (4), pp. 571-587 : 576-577

12. Phaonia juglans sp. nov.

Figs 2 C, D, 3

Diagnosis. The species is similar to Phaonia cincta (Zetterstedt, 1846) with long plumose arista, 4 dorsocentral setae, colour of body, short prealar seta, distinct acrostichal setae. The new species can be distinguished as follows: eye sparsely short haired, palpus dull yellow, antenna brownish-dark, legs brownish-yellow.

Etymology. The species name is based on the Latin name of the genus of tree in the hollow of which the larva of this species was found, Juglans sp.

Type material examined: Holotype male, No. 237, Turkmenistan, Ipay-Kala [Kopet Dag Range], in hollow of nut tree, collected 6.vi.1971, emergence 18.vi.1971, N. Krivosheina [ ZMUM].

Description. Male. Head: Ground-colour black. Eye sparsely short haired. Fronto-orbital plates separated by a narrow frontal vitta which is 1.5 times as wide as diameter of anterior ocellus ( Fig. 3 B). Face, fronto-orbital plates, frontal vitta densely silvery pruinose, shining. Occiput light grey. Fronto-orbital plates with 6 pair of strong long frontal setae in lower half and 2 pairs of very short hairs in upper half ( Fig. 3 A). Distance between eyes about equal to width of postpedicel. In lateral view, facial edge not projecting forward beyond the level of profrons. Antenna dark brownish; scape and pedicel brownish-yellow, postpedicel black except reddish base; arista long plumose, longest aristal hairs as long as diameter of postpedicel. Postpedicel ca 2.5 times as long as wide. Parafacial at level of insertion of arista narrower then width of postpedicel. Gena broad, depth below lowest eye-margin equal to 2 times as diameter of postpedicel. Palpus dull yellow.

Thorax: Ground-colour black with thick greyish-white dust. Scutum with 4 distinct dark longitudinal vittae, seen from behind. Prosternum bare. Prealar seta short, half as long as posterior notopleural seta. Dorsocentrals 2+4. Presutural acrostichals strong, 2 or 3 pairs (assymetrical specimen), half as long as first pair of dorsocentrals ( Fig. 3 A). Meron and katepimeron bare. Notopleuron bare. Katepisternal setae 1+2. Scutellum grey dust, with undusted median line, without yellow marks, entirely bare on underside.

Wing: Clear except for some light clouding over crossveins r-m and dm-cu, white at base. Cross-vein dm-cu upright, almost forming a right-angle with vein M but sinuous. Basicosta and tegula grey. Without costal spine. Radial node on lower side bare. Calypters white. Haltere yellow.

Legs: Coxae grey dusted. Fore femur brown, mid and hind femora yellow with brown dorsal stripe, all tibiae yellow, fore tarsomeres yellow, mid and hind tarsomeres brown. Fore tibia with one posterior seta. Mid tibia with only 2 posterior setae. Hind femur without elongated posteroventrals but with a row of short setulae on posteroventral surface. Hind tibia without apical posteroventrals, with 2 anterodorsals, 3 anteroventrals and 1 posterodorsal seta.

Abdomen: Oval, elongate; dull yellow, with a dark median line. Tergites 4 and 5 grey dusted, tergites 3 and 4 with dark lateral marks at lower angles of tergites ( Fig. 3 C). Sternite 5 as in figure 3D.

Terminalia: Epandrium about as wide as high; surstylus elongate, longer than cerci in lateral view and bent medially with apex rounded ( Fig. 2 C); cercal plate wider than high, without outer and inner ventral projections, with apex rectilinear in posterior view ( Fig. 2 D).

Measurements: Length of body, 5.7 mm. Length of wing, 5.3 mm.

Female: unknown.

Figures

FIGURE 2. Phaonia spp., male terminalia: A, B: Phaonia babarabica sp. nov. (holotype); C, D: Phaonia juglans sp. nov. (holotype). A, C, Terminalia, lateral view. B, D, Cercal plate, posterior view.

FIGURE 3. Phaonia juglans sp. nov., male (holotype): A, Head, lateral view. B, Head and scutum, anterior view. C, Abdomen and scutellum, dorsal view. D, Sternite 5.