Pseudoaerumnosa fragilis, Vilkamaa & Halenius & Ševčík, 2019

Vilkamaa, Pekka, Halenius, Pentti & Ševčík, Jan, 2019, Review of Pseudoaerumnosa Rudzinski (Diptera, Sciaridae), with the description of twenty-four new species, Zootaxa 4656 (1), pp. 1-42 : 25-27

Pseudoaerumnosa fragilis sp. n.

Figs 2 C , 3 A , 4 C , 13 B

Material studied. Holotype male. MALAYSIA, Pahang, Genting Highlands, Awana Cable Car Route , Malaise trap, 10–22.III.1997, H. Hippa, M. Jaschhof & B. Viklund (in SMNH).

Description. Male. Head. Brown, antenna concolorous with face, maxillary palpus pale brown. Eye bridge 3 facets wide. Face with 5 dark long setae. Clypeus non-setose. Mouthparts strongly reduced. Maxillary palpus with one segment, with 2 pointed setae, with a large dorsal patch of sensilla. Antenna short, antennal flagellomeres laterally flattened, asymmetrical in relation to their necks, frontal part larger; densely setose, setae curved, body of 4th flagellomere 1.5x as long as wide, the longest setae much shorter than the width of the flagellomere, neck shorter than wide. Thorax. Brown and unicolorous; setae dark. Anterior pronotum with 1 seta. Proepisternum with 1 seta. Scutellum with 2 long and many short setae. Wing, Fig. 2 C , 3 A . Fumose. Length 1.7 mm. Width/length 0.50. Anal lobe rather large. Hind margin with dorsal and ventral setae. Veins distinct. R1/R 1.50. c/w 0.80. bM shorter than r-m, stM longer than M-fork, stCu as long as bM. R1 joining c before base of M-fork. R1 with dorsal and ventral setae, bM, r-m and StCu non-setose. Haltere pale brown. Legs. Yellow. Fore tibial organ unmodified, with some fine setae. Fore tibial spur longer than the tibial width. Abdomen. Pale brown; setae long, dark and robust. Hypopygium, Figs 4 C , 13 B . Brown, like the abdomen, broad; setae dark. Gonocoxa broad, longer than gonostylus. Gonocoxae fused, ventromedial margin distinct, intergonocoxal area broad and short, largely non-microtrichose, broadly non-setose medially. Setosity of gonocoxa rather sparse (setae nearly missing in the specimen studied). Apicomedial seta poorly differentiated. Gonostylus elongated, narrowed apically, impressed dorso- and ventromedially, with broad medial lobe, with long and narrow apical tooth with a small megaseta attached to its ventral side, with one subapical megaseta near the base of the tooth, and 4 on the medial lobe, the megasetae slender and hyalinous, slightly curved. Tegmen broader than long, straight basolaterally and apically, hyalinous but weakly sclerotized laterally, with tiny aedeagal teeth. Aedeagal apodeme broad with robust apical fork.

Female. Unknown.

Discussion. See under Pseudoaerumnosa curvifalx sp. n.

Etymology. The name is Latin, fragilis , brittle, referring to the slender apical tooth of the gonostylus.

Figures

FIGURE 2. Wing, dorsal.A: Pseudoaerumnosa banari sp. n. (paratype). B: P. eminula sp. n. (paratype from Ulu Temburong). C: P. fragilis sp. n. (holotype). D: P. tenuidens sp. n. (holotype). E: P. consuota sp. n. (paratype). F: P. junciseta sp. n. (paratype). Scale 1.0 mm.

FIGURE 3. Part of hind margin of wing, dorsal. A: Pseudoaerumnosa fragilis sp. n. (holotype). B: P. tenuidens sp. n. (holotype). Scale 0.10 mm.

FIGURE 4. Intergonocoxal area, ventral. A: Pseudoaerumnosa banari sp. n. (holotype). B: P. consuota sp. n. (holotype). C: P. fragilis sp. n. (holotype). D: P. tenuidens sp. n. (paratype from Sabah, Mainline West). Scale 0.10 mm.

FIGURE 13. Hypopygium, ventral. A: Pseudoaerumnosa formosa sp. n. (holotype). B: P. fragilis sp. n. (holotype). Scale 0.10 mm.