Pseudoaerumnosa tkoci Vilkamaa, Halenius & Ševčík, 2019

Chen, Zuluan, Yang, Xue, Menzel, Frank, Wu, Hong & Huang, Junhao, 2021, Three Oriental species of Pseudoaerumnosa Rudzinski (Diptera, Sciaridae) from China, Zootaxa 4969 (3), pp. 551-562 : 558-561

Pseudoaerumnosa tkoci Vilkamaa, Halenius & Ševčík, 2019

( Figs. 5 , 6C )

New material. CHINA: Zhejiang province, Lin’an, 3 male, Tianmu Mountain, Malaise trap, 29.VII.2018, Zuluan Chen ( ZAFU) [XWCZ-15, XWCZ-24, XWCZ-26]; 1 male, same data, but 27.III.2018 [XWCZ-38].

Redescription. Male. Brown. Head. Eye bridge 2–3 rows of facets. Prefrons with 10 setae. Clypeus with no setae. Palpus ( Fig. 5B ) one-segmented, with 3 setae and a large dorsal patch of sensillae. Antennal flagellomeres ( Fig. 5A ) asymmetrical and the frontal part larger. Length/width of 4th flagellomere: 2.20–2.39. Neck length/width: 0.50–0.54. Thorax. Anterior pronotum with 5–6 setae. Proepisternum with 2–3 setae. Wings ( Fig. 6C ). Length 2.74–2.84 mm. Width/length: 0.47–0.49. R1/R: 1.68. c/w: 0.66. R1 with dorsal and ventral setae, bM, r-m and stCuA bare. Legs. Foretibia unmodified without specialized setae. Foretibia spur longer than the tibial width. Hypopygium ( Fig. 5C ). Gonocoxite slightly longer than gonostylus. Gonocoxites fused, ventromedial margin distinct with short to moderate setae, ventrolateral surface with long and dense setae, apicomesial corner with 1 or 2 elongated setae. Intergonocoxal area without lobe- or finger-like projections, without setose area. Gonostylus elongated with a medial lobe, which has 3 megasetae. Apical tooth with a megaseta attached to its ventral side, with 2 subapical megasetae near the tooth, all these megasetae slender and slightly curved. Tegmen wider than long, nearly straight apically, narrowed at middle. Aedeagus with distinct apical fork and basal sclerotization.

Distribution. China: Taiwan, Zhejiang.

Remarks. The new specimens examined show a slight difference from the type specimen by the apical part of the apical tooth in the Chinese specimens being shorter than in the holotype.

Figures

FIGURE 5. P. tkoci Vilkamaa, Halenius & Ševčík, 2019, male [XWCZ-15]. A. 4th flagellomere, lateral view; B. Palpus, lateral view; C. Hypopygium, ventral view. Scale bar (A, C) = 0.10 mm, scale bar (B) = 0.05 mm.

FIGURE 6.Wings, dorsal view. A. Pseudoaerumnosa regularis sp. n. (holotype); B. Pseudoaerumnosa tianmushana sp. n. (holotype). C. P. tkoci Vilkamaa, Halenius & Ševčík, 2019; Scale bar = 0.50 mm.