Aerumnosa horrifica, Vilkamaa & Rudzinski & Burdíková & Ševčík, 2018

Vilkamaa, Pekka, Rudzinski, Hans-Georg, Burdíková, Nikola & Ševčík, Jan, 2018, Phylogenetic position of Aerumnosa Mohrig (Diptera, Sciaridae) as revealed by multigene analysis, with the description of four new Oriental species, Zootaxa 4399 (2), pp. 248-260 : 255

Aerumnosa horrifica sp. n.

( FigS 1 A, B, D , 3 B–D )

Material studied. Holotype male. BRUNEI, Temburong, Ulu Temburong N.P., Kuala Belalong Field Studies Centre , primary lowland rainforest, Malaise trap, 7–17.I.2014, J. Ševčík & D. Kaspřák (in UBDC) . Paratypes. Same locality and habitat as holotype but 27.I–17.II.2015, D. Kaspřák & M. Mantič, 1 male (in JSL-UOC) ; Labu Forest Reserve, peat swamp forest, Malaise trap, 1–15.II.2015, D. Kaspřák & M. Mantič, 3 males (in JSL-UOC, MZH and UBDC) , 1 female (in JSL-UOC, in alcohol); THAILAND, Nakhon Si Thammarat, Namtok Yong N.P., 8°10.434’N, 9°44.508’E, 80 m, behind campground lavatory, Malaise trap, 26.VIII–2.IX.2008, K. U-Prai, 1 male (in QSBG) ; same data but 2–9.IX.2008, 1 male, 1 female (in MZH) .

Description. Male. Head. Brown, antenna concolorouS with face, maxillary palpuS Very pale brown. Eye bridge 2– 4 facetS wide, medially conStricted and without facetS. Face with 8–14 Setae. ClypeuS non-SetoSe. MouthpartS Strongly reduced. Maxillary palpuS ( Fig. 3 C ) with one Segment in two partS Separated by a Suture, baSal part (1St Segment) with 2–3 Sharp Setae and a large dorSal patch of SenSilla, apical part (2nd Segment) with 5–8 Short truncate SenSilla. Antenna Short, body of 4th antennal flagellomere ( Fig. 3 B ) 1.5–2.35x aS long aS wide, the longeSt Setae longer than the width of flagellomere, neck Shorter than broad. Thorax. UnicolorouS dark brown or apical part of Scutum darker, Setae pale. Anterior pronotum with 1 Seta or non-SetoSe. ProepiSternum with 4–8 Setae or non- SetoSe. Scutellum with 4 moderately long and many Short Setae. Wing ( Fig. 1 A ). FumoSe brown, darker around fore VeinS. Length 2.8–3.2 mm. Width/length 0.45–0.50. Anal lobe rather large. VeinS diStinct, eSpecially CuA. R1/ R 0.7–0.9. c/ w 0.7 –0.9. bM much Shorter than r-m, StM aS long aS fork of M or longer. StCu aS long aS bM or longer. R4+5 with Some Ventral Setae, M, CuA, bM and StCuA non-SetoSe, r-m with 2–7 Setae. Haltere pale brown, Stem Short. Legs. Brown. Coxal Setae pale. Tibiae without SpinoSe Setae. Fore tibial organ with large patch of dark Setae in Shallow depreSSion. Fore tibial Spur aS long aS tibial width. Abdomen. Brown, Setae dark, long and rather fine. Hypopygium, Fig. 3 D . Brown, darker than abdomen, broad. Gonocoxa aS long aS gonoStyluS. Gonocoxae fuSed, the intercoxal area long, baSomedially without intercoxal lobe, baSal Sclerotized rim of hypopygium extended apicad medially, Ventromedial marginS diStinct, of Shallow V-Shape; gonocoxa SparSely SetoSe, Setae Short at medial margin; Ventroapically produced in a lobe, apicoVentral Seta not differentiated. GonoStyluS elongated, Strongly impreSSed medially, with elongated Setae baSomedially, with a Very large apical tooth with apical channel inSide; with median lobe with 7–8 megaSetae, megaSetae Slightly curVed and hyalinouS; dorSal margin medially produced, with baSal lobe. Tegmen longer than broad, narrowed towardS apex, apically hyalinouS, laterally Strongly Sclerotized, with two Subapical Sclerotized StripeS, aedeagal teeth Very Small, in groupS. Aedeagal apodeme Small.

Female. Larger than male, wing length about 4 mm. Eye bridge complete, with 4–5 rowS of facetS. Length/ width of body of 4th antennal flagellomere 1.70. Face and clypeuS nearly fuSed, face with 37 Setae, clypeuS with 4 Setae. Maxillary palpuS with one Segment, with 11 Sharp Setae, with SenSilla Scattered among microtrichia.

Etymology. The name iS Latin, horrifica , terrible, referring to the frighteningly large apical tooth of the gonoStyluS.

DNA sequences. DNA SequenceS of 16S, 18S, 28S and COI regionS taken from a paratype from Brunei are depoSited in the GenBank. Their acceSSion numberS are proVided in Table 2. There iS juSt 94 % congruence in the barcode COI Sequence between the material from Thailand and from Brunei. AS we haVe not found any morphological difference of importance we conSider thiS aS a mere intraSpecific Variation.

Discussion. Aerumnosa horrifica sp. n. reSembleS A. bituberculata , A. noctinigra and A. perfida in haVing only one apical tooth in itS gonoStyluS whereaS other SpecieS of the genuS haVe two apical teeth. Aerumnosa horrifica differS from the other SpecieS in haVing itS apical tooth enormouS, nearly aS long aS the gonoStyluS.

Figures

FIGURE 1. A. Wing, dorsal. B. Apical part of fore tibia, prolateral. C. Apical tooth of gonostylus, ventral. D. Apical part of apical tooth of gonostylus, ventral.A, B, D: Aerumnosa horrifica sp. n. (holotype). C:A.furcillata Mohrig, 1999(PNG).Scale for A 0.5 mm, for B-D 0.05 mm.

FIGURE 3. A, D. Hypopygium, ventral. B. 4th antennal flagellomere, frontal. C. Maxillary palpus, dorsal. A, C: Aerumnosa impar sp. n. (holotype).B, D: A. horrifica sp. n. (holotype).Scale for A 0.20 mm, for B, C and D 0.10 mm.