Pseudoaerumnosa tianmushana Chen & Huang, 2021

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

Pseudoaerumnosa tianmushana Chen & Huang sp. n.

( Figs. 3C–F , 4 , 6B )

Specimens examined. Holotype: male. CHINA: Zhejiang province, Lin’an, Tianmu Mountain, Malaise trap, 29.VII.2018, Zuluan Chen ( ZAFU) [XWCZ-21] . Paratypes, 15 males, same data as holotype ( ZAFU) [XWCZ-3, XWCZ-12, XWCZ-13, XWCZ-14, XWCZ-16, XWCZ-17, XWCZ-18, XWCZ-19, XWCZ-20, XWCZ-23, XWCZ- 31, XWCZ-32, XWCZ-33, XWCZ-37, XWCZ-42].

Description. Male. Brown. Head. Eye bridge with 2–3 rows of facets. Prefrons with 13 setae. Clypeus with no setae. Palpus one-segmented, with 2 setae and a large dorsal patch of sensilla. Antennal flagellomeres ( Fig. 4A ) asymmetrical with the frontal part larger. Length/width of 4th flagellomere: 1.88–2.09. Neck length/width: 0.93–0.94. Thorax. Anterior pronotum with 4–5 setae. Prothoracic episternum with 2–3 setae. Wings ( Fig. 6B ). Length 2.36–2.47 mm. Width/length: 0.46–0.48. R1/R: 1.64. c/w: 0.79–0.80. R1 with dorsal and ventral setae, bM, r-m and stCuA bare. Legs. Foretibia ( Fig. 4B ) unmodified, without specialized setae. Foretibia spur longer than the tibial width. Hypopygium ( Figs. 3C–F , 4C ). Gonocoxite 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 have 3 megasetae.Apical tooth with a long megaseta attached to its ventral side and 2 subapical megasetae near the tooth, the megasetae slender and slightly curved. Tegmen broader than long, smoothly rounded apically and basolaterally sclerotized. Aedeagus with an indistinct apical fork and a basocentral sclerotized central strip.

Distribution. China: Zhejiang.

Remarks. Pseudoaerumnosa tianmushana sp. n. resembles P. formosa in its elongated gonostylus and tegmen narrowed above the middle, but differs by having an aedeagus with indistinct apical fork and gonostylus medial lobe reaching to apical 1 / 3 of gonostylus, while having an aedeagus with distinct apical fork and gonostylus with medial lobe reaching to apical 1 / 4 of gonostylus in P. formosa .

Etymology. This species is named after its type locality, Tianmu Mountain (Chinese: Tianmu-shan) in Zhejiang province, China.

Figures

FIGURE 3. Tegmen, ventral view. A–B. Pseudoaerumnosa regularis sp. n. (paratype); C–F. Pseudoaerumnosa tianmushana sp. n. (paratype). Scale bar = 0.10 mm.

FIGURE 4. Pseudoaerumnosa tianmushana sp. n., male, holotype. A. 4th flagellomere, lateral view; B. Apex of foretibia, prolateral view; C. Hypopygium, ventral view. Scale bar = 0.10 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.