Platypalpus dursuni, Barták & Kubík, 2018

Barták, Miroslav & Kubík, Štěpán, 2018, Hybotidae (Diptera) from Turkey, with descriptions of seven new species, Zootaxa 4410 (3), pp. 453-482 : 461-462

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Platypalpus dursuni

sp. nov.

Platypalpus dursuni sp. nov.

( Figs 15–18 View FIGURES 15–18 , 31 View FIGURES 31–33 )

Type material. HOLOTYPE ♂, labelled: “ Turkey, 13 km NE of Mugla, pine wood + pasture, 37°15′N, 28°30′E, 1100–1300 m, Barták, Kubík, 2.-3.v.2016 ” ( CULSP) GoogleMaps . PARATYPES: 1♂, 2♀, same data as holotype ( CULSP) GoogleMaps .

Diagnosis. Very small black species of the P. hackmani group with 2 pairs of vertical setae (inner inclinate, outer lateroclinate); antenna with basal two segments yellow, postpedicel black; thorax entirely microtrichose including katepisternum, large setae dark; legs yellow with segments 2–4 of fore tarsi contrastingly black in male, mid femur with distinct ventral spines, midtibial spur absent, lacking posteroventral setae on mid femur; abdomen microtrichose; left epandrial lamella triangular.

Description. Male. Head black, face and genae yellow, grey microtrichose. Frons about 0.07 mm broad ventrally (wider than pedicel) and widening dorsally (about 0.12 mm broad on upper part at level of anterior ocellus). Face about 0.06 mm broad at middle, almost parallel-sided. Gena broad and microtrichose. Antenna ( Fig. 15 View FIGURES 15–18 ) with basal segments yellow, postpedicel and stylus black; postpedicel broadly ovate, 2.3X longer than broad, stylus subequally long. Clypeus microtrichose. Palpus yellow, narrowly ovate, less than half as long as labrum, with 1 yellow dorsal seta and several very small additional setae. Ocellar setae dark brown, about 0.15 mm long, ocellar tubercule with two pairs of minute additional setulae. Two pairs of long black vertical setae (outer lateroclinate pair as long as ocellars, inner pair even longer), inner pair inserted wide apart (0.19 mm). Occiput sparsely and rather long setose, dorsal setae brownish yellow, ventral setae white and comparatively short. Proboscis black, half as long as head height. Thorax black, entirely grey microtrichose including katepisternum. Large setae black to brown and strikingly long, small setae brownish yellow, proepisternal seta yellow. Chaetotaxy: postpronotal seta very long and inserted posteriorly, two additional setae shorter and other short pale setae inserted on anterior part of postpronotum; acrostichals biserial (about 7 setae in a row), 0.07 mm long; dorsocentrals irregularly uniserial, first 2–3 pairs short, last 3–4 pairs long (anterior one situated anterior to middle of mesoscutum); posthumeral seta present and long, notopleuron with two long setae and 2–4 additional smaller setae; 1 short supraalar; 1 postalar and 1 pair of long scutellar setae (with additional pair of smaller setae laterally). Wing clear with yellow veins, R4+5 and M1+2 evenly slightly diverging, vein R4+5 slightly bowed towards C apically. Crossveins narrowly separated. CuA2 nearly perpendicular and slightly bowed, anal vein depigmented and indistinct in basal portion. Costal seta brown and very long, also second costal seta strong in male paratype. Squama pale yellow with pale fringes. Halter whitish yellow. Legs clear yellow, segments 2–4 of fore tarsus contrastingly black (except basalmost parts), mid and hind tarsi yellow with slightly darkened tips of last 3–4 segments (not contrastingly and no annulations). Coxae with yellow setae, those on fore coxa very long and strong. Fore femur thickened (1.4X broader than mid femur - measured at broadest points), covered with short pale setae except somewhat longer preapicals, anteroventrals short, posteroventrals about one-third as long as femur depth. Fore tibia slightly thickened, short and mostly pale setose, with 1–2 rather long dark anterodorsals. Mid femur much narrower than fore femur, with two long brown anterior setae on apical part, no posteroventral setae, ventrally with two rows of dark spine-like setae, those in posterior row up to 0.05 mm long on basal third becoming shorter and paler apically. Mid tibia narrower than fore tibia, with 1–2 black anterodorsal setae, ventrally with short black spine-like setae less distinct in proximal half, no apical spur. Hind femur relatively strong, short setose ventrally, with longer dark preapicals. Hind tibia with two rather long and black anterodorsal setae (submedian and preapical). Abdomen brown, rather sparsely grey microtrichose, tergites in some lights subshiny, genital lamellae lustrous. Abdominal setae mostly brownish yellow to brown and short. Genitalia ( Figs 16–18 View FIGURES 15–18 ) small, left epandrial lamella ( Fig. 18 View FIGURES 15–18 ) triangular-shaped apically, cerci ( Fig. 17 View FIGURES 15–18 ) short and simply digitiform, left cercus slightly broader than right one, right epandrial lamella ( Fig. 16 View FIGURES 15–18 ) oval, surstylus with distinct small setae. Female. Similar to male, except as follows: face darker, yellowish parts confined to middle of gena; fore femur with yellowish brown ring occupying middle half of femur, mid and hind femora only slightly shadowed middorsally; tarsal joints (except basitarsi) of all legs darkened apically, least two segments almost entirely brownish yellow to yellowish brown.

Length: body 1.9 mm (male), 2.0– 2.1 mm (female), wing 1.8–2.0 mm.

Etymology. The species epithet, dursuni , is a Latin genitive patronym to honor Oktay Dursun for his help during our expeditions.

Distribution. Turkey, Muğla province.

Remarks. The species described above is very closely allied to P. bohousi sp. nov. For differential diagnosis see remarks under the latter species.