Pseudoaerumnosa impensa, 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 : 27

Pseudoaerumnosa impensa sp. n.

Fig. 14 A

Material studied. Holotype male. MALAYSIA, Pahang, Cameron Highlands, Tanah Rata, Gunung Jasar , 1400 m, Malaise trap, 17–22.XI.1994, A. Heinakroon (in SMNH) . Paratype. MALAYSIA, same data as holotype but 20–23.XI.1994, 1 male (in MZH) .

Description. Male. Head. Brown, antenna concolorous with face, maxillary palpus pale brown. Eye bridge 2–3 facets wide. Face with 13 long, dark setae. Clypeus non-setose. Mouthparts strongly reduced. Maxillary palpus with one segment, with 3–4 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 1.9x 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 4 setae. Proepisternum with 4 setae. Scutellum with 2 long and many short setae. Wing. Fumose. Length 2.4–2.7 mm. Width/length 0.50–0.55. Anal lobe moderate. Hind margin with dorsal setae only. Veins distinct. R1/R 1.40–1.50. c/w 0.85. 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 as long as the tibial width. Abdomen. Pale brown; setae long, dark, and robust. Hypopygium, Fig. 14 A . Brown, like the abdomen, broad; setae dark. Gonocoxa as long as gonostylus. Gonocoxae fused, ventromedial margin distinct, intergonocoxal area broad and short, largely non-microtrichose, broadly non-setose medially. Setosity of gonocoxa long and dense. Apicomedial seta poorly differentiated. Gonostylus elongated, rather tumid, slightly impressed dorso- and ventromedially, with rather robust medial lobe, with long and curved apical tooth with a small megaseta attached to its ventral side, with 2 subapical megasetae near the base of the tooth, and 4 on the medial lobe, the megasetae slender and hyalinous, slightly curved. Tegmen as long as broad, straight apically, slightly broadened laterally, hyalinous but weakly sclerotized basolaterally, with tiny aedeagal teeth. Aedeagal apodeme indistinct.

Female. Unknown.

Discussion. Pseudoaerumnosa impensa sp. n. resembles P. ampliata sp. n., see under the latter.

Etymology. The name is Latin, impensa , large, referring to the thick gonostylus.

Figures

FIGURE 14. Hypopygium, ventral. A: Pseudoaerumnosa impensa sp. n. (holotype). B: P. inviolata Rudzinski, 2006 (paratype). Scale 0.10 mm.