Bradysia plusiospina, Heller & Hippa & Vilkamaa, 2015

Heller, Kai, Hippa, Heikki & Vilkamaa, Pekka, 2015, Taxonomy of Bradysia Winnertz (Diptera, Sciaridae) in the Northern Holarctic, with the description of four new species, European Journal of Taxonomy 122, pp. 1-15 : 11-12

Bradysia plusiospina sp. nov.

urn:lsid:zoobank.org:act:9EFEEAC1-6A5A-49FA-881B-1AA96CA76C28

Fig. 6 A–B

Diagnosis

Medium-sized Bradysia . Brown. Maxillary palpus with 3 segments, segment 1 with a dorsal patch of sensilla. Wing length 1.8–1.9 mm, anal lobe small. Gonocoxa and gonostylus narrow, gonostylus straight, mesially weakly impressed, without apical tooth, with 7 sharp megasetae in two groups.

Etymology

The name is derived from the Latinized Greek word plousious (wealthy), and the Latin word spina (spine), referring to the many gonostylar megasetae of the species.

Material examined

Holotype

FINLAND: ♂, Ostrobothnia borealis, Tervola, Yrttijänkä (Grid 7346827:340814), near a spring, Malaise trap, 1–28 Jun. 2004, J. Salmela, MZH.

Paratype

FINLAND: same data as holotype, ♂, MZH.

Description (male)

HEAD. Brown, antennal flagellomeres unicolorous, paler brown, maxillary palpus very pale brown. Eye bridge 3 facets wide. Face with 31–40 scattered longer and shorter setae. Clypeus with 1 seta. Maxillary palpus with 3 segments; segment 1 longer than segment 3, segment 2 shortest; segment 1 with 4–6 setae, with dorsal patch of sensilla; surface of antennal flagellomeres smooth, body of flagellomere 4 3.1× as long as wide, neck shorter than broad, longest setae slightly longer than the width of flagellomere.

THORAX. Brown, setae pale. Anterior pronotum with 6–7 setae. Episternum 1 with 8–9 setae. Scutum with long dorsocentrals, with some longer and shorter laterals, scutellum with 2 longer and some short setae.

WING. Fumose. Length 1.8–1.9 mm. Width/length 0.40. Anal lobe small. Veins distinct. R1/R 0.80. c/ w 0.60 –0.70. r-m and bM subequal in length. r-m with 1 seta, bM non-setose.

LEGS. Yellow. Coxal setae pale. Front tibial organ with pale vestiture forming short row. Front tibial spur longer than tibial width. Claws without teeth.

ABDOMEN. Pale brown, setae pale and short.

HYPOPYGIUM ( Fig. 6 A–B). Brown, concolorous with abdomen.

GONOCOXA. Narrow, longer than gonostylus, mesial margin with short setosity.

GONOSTYLUS. Narrow, rather straight, slightly narrowed and curved towards apex, with mesial side weakly impressed; with dense apical setosity, without apical tooth, with 7 megasetae, megasetae in apical and subapical groups, subequal in size, sharp. Tegmen truncate, with straight lateral sides, weakly sclerotized, with area of aedeagal teeth. Aedeagal apodeme short.

Remarks

Bradysia plusiospina sp. nov. resembles B. pseudocampestris Mohrig, 1978 and B. angustata Tuomikoski, 1960 in the general form of the hypopygium and gonostylus, as well as in having the anal lobe of the wing poorly developed. Bradysia angustata differs from the others in having an apical tooth and slightly stronger megasetae in its gonostylus, and in having its wing even narrower than the others. Bradysia plusiospina sp. nov. can be distinguished from B. pseudocampestris in having stronger megasetae, some megasetae in a more lateral position than in the latter species and in having a more setose basal part of its hypopygium (see Mohrig 1978: figs 4, 7). Bradysia plusiospina sp. nov. is placed in the Bradysia fungicola group of Menzel & Mohrig (2000).

Figures

Fig. 6. Bradysia plusiospina sp. nov. (holotype). A. Part of hypopygium, ventral view. B. Gonostylus, ventral view. Scales = 0.1 mm.