Dziedzickia pectinata, Ševčík & Bechev & Hippa, 2011

Ševčík, Jan, Bechev, Dimitar & Hippa, Heikki, 2011, New Oriental species of Gnoristinae with pectinate antennae (Diptera: Mycetophilidae), Acta Entomologica Musei Nationalis Pragae 51 (2), pp. 687-696 : 691-694

Dziedzickia pectinata sp. nov.

( Figs. 3–4 , 6 , 12–13 )

Type material. HOLOTYPE: J, THAILAND: NAKHON NAYOK: Khao Yai NP, behind Training Center , 14°27.119′N 101°21.482′E, 699 m, Malaise trap, 12.–19.v.2007, Wirat Sukho leg., T2268 ( QSBG) . PARATYPES: THAILAND: the same data as holotype, 5JJ 1♀ ( QSBG, JSOC) ; NAKHON NAYOK: Khao Yai NP, Lum Ta Kong View Point , 14°25.82′N 101°23.754′E, 744 m, Malaise trap, 19.–26.iv.2007, Wirat Sukho leg., T2129, 7 JJ 1♀ ( QSBG, JSOC) ; Khao Yai NP, entrance of Hnong Pak Chee Trail , 14°27.115′N 101°21.951′E, 733 m, pan traps, 11–12.v.2007, Pong Sandao leg., T2262, 1J 2 ♀♀ ( QSBG) ; Khao Yai NP, evergreen forest near Hnong Pakchee , 14°27.119′N 101°21.482′E, 699 m, Malaise trap, 5.–12.v.2007, Pong Sandao leg., T2265, 4 JJ 1♀ ( QSBG, JSOC) ; Khao Yai NP, PA TABAK, 17.–28.iv.2001, 1 J ( DBPC) ; Khao Yai NP, Khao – Kheo , 17.–28.iv.2001, 5 JJ 1 ♀ ( DBPC) ; Khao Yai NP, Tao Tapoo , 14.–24.v.2001, 5 JJ ( DBPC) .

Additional material examined. The following material (mostly specimens without antennae and/or legs) is not included in the type series: THAILAND: NAKHON NAYOK: Khao Yai NP, evergreen forest near Hnong Pakchee , 14°27.119′N 101°21.482′E, 699 m, Malaise trap, 5.–12.v.2007, Pong Sandao leg., T2265, 12 JJ ( QSBG, JSOC) ;

Khao Yai NP, behind Training Center, 14°27.119′N 101°21.482′E, 699 m, Malaise trap, 12.–19.v.2007, Wirat Sukho leg., T2268, 16JJ 1♀ ( QSBG, JSOC) ; Khao Yai NP, entrance of Hnong Pak Chee Trail, 14°27.115′N 101°21.951′E, 733 m, Malaise trap, 19.–26.v.2007, Pong Sandao leg., T2270, 10 JJ ( QSBG, JSOC) .

Description. Male. Body length 5.9 mm. Wing length 4.65 mm (holotype).

Head yellow, dark brown near the ocelli. Three ocelli, almost in one line. Lateral larger than the median, separated from eye margin for distance about 1.3 times, and from median ocellus by about 0.5 times their diameter. Eyes oval, slightly emarginated near base of the antennae, with row of dark setulae near posterior eye margin. Antenna strongly pectinate ( Fig. 3 ). Scape and pedicel yellowish. Scape prolonged anteriorly. Basal parts of flagellomeres 1 to 5 yellowish, those of F6 and F7 apically brown, those of F8 to F13 mostly brown and that of F14 yellowish brown. Flagellar projections mostly brown, their apical parts yellowish brown. Flagellomeres 1 to 13 with a long anterior projection covered by thin setae maximally twice as long as the diameter of the projection. Projection on F1 about half as long as the height of head, those on F2 to F13 about as long as the height of head or slightly longer. The apical flagellomere elongated, without distinct projection. Clypeus ovate, setose. Mouthparts short, labellum large, palpus with four palpomeres (the first one very short).

Thorax. Scutum yellow with brown lateral spot above wing base. Scutellum and pleura yellow. Scutum with dark acrostichal, dorsocentral and longer lateral setae; areas between them bare. Scutellum covered with setae as long as its length. Anterior parapsidal suture distinct. Proepisternum with some small setae. All pleura and mediotergite bare.

Wing ( Fig. 6 ) hyaline, unmarked, membrane covered only with irregularly arranged microtrichia, without macrotrichia. Setulae present on upper side of R, R 1 and R 5. Other postcostal veins bare. Costa produced beyond R 5 to about 1/3 of the distance between the tips of R 5 and M 1. Sc long, ending in R 1 before Rs. R-M about 3 times as long as Rs. Stem of M-fork absent or very short. Base of Cu-fork before the base of M-fork. CuP weak, shorter than A 1. Haltere yellow, with a slightly darkened knob.

Legs. Coxae and femora yellow, tibiae yellowish with trichia irregularly arranged, tarsi brown. Fore coxa with setae mainly in the anterior part, mid coxa mainly in the apical part, hind coxa along its posterior margin. Mid tibia with some short anterodorsal and posterodorsal setae, hind tibia with some short anterior and dorsal setae. Some longer apical setae on tibia 1 to 3. Anteroapical depressed area of fore tibia large ( Fig. 8 ). Spurs yellow, tibial spurs formula 1: 2: 2. Ratio of fore tibia to tarsomeres 1 to 5 = 4: 3: 1.5: 1: 0.8: 0.5.

Abdomen yellow with dark bristles. Tergites 2 to 6 with brown posterior bands. Tergites 1 and 7 darkened only narowly along their posterior margin, tegrite 8 short, all yellow. Sternites without median sclerotized concave fold.

Terminalia. Tergite 9 short, transverse, almost thrice as broad as long ( Fig. 13 ). Cerci about as long as tergite 9, placed caudally to tergite 9. Hypoproct remarkably longer than cerci ( Fig. 13 ). Gonocoxites basally yellow and apically brown, ventrally separated ( Fig. 12 ). Gonocoxite dark, apically narrowing, protruding into a distinct posterior projection. Aedeagus narrow, club-shaped. Gonostylus with proximal lobe apically rounded. Distal lobe of gonostylus directed inwards, subapically with a distinct tooth and several setae ( Fig. 13 ).

Female. Body length 7.4 mm. Wing length 6.45 mm. Similar to male in coloration, but with brown posterior bands on tergites wider. Scape and pedicel yellow, flagellum mostly brown ( Fig. 4 ). Terminalia yellowish. Flagellomeres 1 to 13 with a small anterior projection, as long as the diameter of the flagellomere. Flagellomere 14 simple. Fore tarsomeres 1 to 4 widened from below, with a bare medial stripe enclosed with a row of short setae, more distinct in tarsomeres 1 and 2 ( Fig. 9 ). Ratio fore tibia: tarsomeres 1 to 5 = 4: 3: 1.5: 1: 0.8: 0.5.

Differential diagnosis. The strongly pectinate male antennae are diagnostic for this species, at least within the species currently included in Dziedzickia ; D. bifida sp. nov. (described above) differs mainly in having two projections on each flagellomere.

Etymology. From the Latin pectinatus (= comb-like), referring to the structure of the male antennae.

Distribution. Thailand (Khao Yai NP).

Comments. The absence of the stem of M-fork is noteworthy. This character state is typical for the Nearctic genus Schnusea Edwards, 1933 (see LANE & COHER 1950). This genus is, however, considered by OLIVEIRA & AMORIM (2010) as a monophyletic subgroup within Dziedzickia s. lat. and thus its junior synonym, in order to retain the entire Dziedzickia as monophyletic. In one undescribed Nearctic species of Schnusea , the vein R-M even terminates at the anterior branch of M-fork (= M1). We have seen 35 males and 2 females of this species and in all specimens (except one male) R-M is ending at M1 (see Fig. 7 ).

Figures

Figs. 1–4.1–2 – Dziedzickia bifida sp. nov., head and thorax in lateral view (1 – male, holotype; 2 – female,paratype). 3–4 – D. pectinata sp. nov., head and thorax in lateral view (3 – male, holotype; 4 – female, paratype).

Figs. 5–9. 5–7 – wing venation (5 – Dziedzickia bifida sp. nov., holotype; 6 – D. pectinata sp. nov., holotype; 7 – Schnusea sp., male from Peru). 8–9 – Dziedzickia pectinata sp. nov., paratypes (8 – male fore tibia; 9 – female fore tarsus).

Figs.10–13. 10–11 – Dziedzickia bifida sp. nov., holotype, male terminalia (10 – ventral view; 11 – dorsal view). 12– 13 – D. pectinata sp. nov., holotype, male terminalia (12 – ventral view; 13 – dorsal view). Scale bars: 0.1 mm.