Trichosiopsis scutellata theae

Taxonavigation

Ordo: Diptera
Familia: Sciaridae
Genus: Trichosiopsis
Species: Trichosiopsis scutellata

Name

Trichosiopsis scutellata theae  unpublished

Type material

Holotype male, 18.08.2015, Sweep netting, leg Olsen, bf-sci-01237 in NHMO

Type locality

Norway, Hordaland, Stord, Hageberg SV

Barcoded material studied

Stadium	Country	Province	Locality	Habitat	Method	Date	Collector	Collection Number	Collection	Latitude	Longitude	Elevation (m)
1 ♂ (holotype)	Norway	Hordaland	Stord, Hageberg SV  SE of Vistvik, NE coast of Stord		Sweep netting	18.08.2015	Kjell-Magne Olsen	bf-sci-01237	NHMO	59.942	5.429	50
1 ♂	Norway	Telemark	Tokke, N Bandakjordet	Bratt ur med edellovskog langs kantene og bratt berg videre oppover	Sweep netting	16.07.2015	Oivind Gammelmo; Kjell-Magne Olsen	bf-sci-01582	NHMO	59.4483	8.00004	140
1 ♀	Norway	Ullensaker	Sessvollmoen	sandtak	Malaise trap	06.08.2014	Kjell-Magne Olsen	bf-sci-00526	NHMO	60.244	11.157	185
1 ♂	Germany	Hesse	Lorch am Rhein, oberhalb der Burg Nollig	Trockenhang	Malaise trap	5.5.–10.5.2013	Oliver Niehuis	ZFMK-TIS-2527931	ZFMK	50.05	7.798
1 ♂	Germany	Brandenburg	Grumsiner Forst, Langer Berg	Wald	Malaise trap	25.06.2013	SDEI	ZFMK-TIS-2520469	ZFMK	52.982	13.914	90

Description (male)

Head. Eye bridge 4 rows of facets. Antenna unicolour. LW-index of 4^th flagellomere 2.1–2.5; neck 0.31–0.41 × segment width; transition of basal part to neck pronounced. Colour of neck unicolour. Antennal setae shorter than segment width; of normal strength; dense; salient. Palpus darkened; of normal length; palpomeres 3. First palpomere of normal shape; with 4–7 setae; with only sparse sensilla. Second palpomere short and oval. Third palpomere as long as first. Thorax. Colour brown, or reddish. Notum unicolour. Thoracic setae long and strong; black. Posterior pronotum setose. Postpronotal setae 3–5; fine. Mesothoracic sclerites bare. Legs. Colour yellow. Hind coxa of same colour as femora. Setae on front coxa black. Front tibial organ as patch of setae; dark; front tibial organ not bordered. Tibial setae on hind legs normal, shorter than tibial width. Tibial spurs of equal length. Claws untoothed. Wing. Wing slightly darkened; of normal shape. Wing membrane without macrotrichia. Wing venation weak, with faint stM. M-fork of normal shape. R₁ ending at or slightly before base of m-fork; posterior veins with macrotrichia; stM mostly with macrotrichia; CuA₁ and CuA₂ mostly with macrotrichia; bM bare; r-m mostly setose; bM:r-M 0.85–1; st-Cu:bM 0.65–0.9; R₁:R 1.3–1.6; c:w 0.63–0.72. Halter darkened; of normal length. Abdomen. Abdominal setae strong; dense; on tergites black; on sternites black. Hypopygium concolour with abdomen; LW-index 0.61–0.71. Base of gonocoxites with strong setae; gonocoxites broadly separated; inner margin of gonocoxites typically U-shaped; inner membrane of hypopygium scarcely setose; ventral margin of gonocoxite with short setae. Gonostylus elongate; LW-index 1.9–2.15; Inner margin straight, or concave; apex nearly rectangular. Apical tooth present; without internal structure; of medium strength; LW-Index 1.5–2.3. Awl-like setae normal; present beneath apical tooth. Megasetae absent. Whiplash-hair absent. Tegmen 0.56–0.66 × longer than broad; rectangular with rounded edges; without special features; central process absent. Length of ejaculatory apodeme/hypopygium 21–31 %; base of ejaculatory apodeme present. Field with aedeagal teeth inconspicuous. Measurements. Body size 2.8–3.5 mm. Hind tibia 1.45–1.57 mm. Wing length 2.5–3 mm.

Diagnosis

The new subspecies is based on its unique COI sequence. Tr. scutellata theae has a mesially more convex gonostylus, which is apically more bulged than in the other subspecies. So it does not have the typical short, rectangular shape.

DNA Barcoding

The COI sequence is assigned to BIN BOLD:ACG4078 (average distance 0.46%, max. 0.96%, n=7, K2P: 5.14%).

Etymology

The subspecies is named after Thea Schäpe.

Discussion

Trichosiopsis scutellata theae has a quite high K2P and might be considered a distinct species in the future. There is a single specimens from Norway (bf-sci-1344), of which only 463 base pairs were sequenced and therefore no new BIN was assigned. The K2P of more than 5% indicates, that it probably belongs to still another subspecies, intermediate between Tr. scutellata theae and Trichosiopsis scutellata lenae. It will be formally described only, when further material is available.

Distribution

Germany, Norway.

Images

Figure 1. Trichosiopsis scutellata theae male (holotype), hypopygium, scale 0.1 mm  Figure 2. Trichosiopsis scutellata theae male (holotype), gonostylus (ventral view), scale 0.1 mm  Figure 3. Trichosiopsis scutellata theae male (holotype), gonostylus (dorsal view), scale 0.1 mm  Figure 4. Trichosiopsis scutellata theae male (holotype), aedeagal complex, scale 0.1 mm  Figure 5. Trichosiopsis scutellata theae male, 4th antennal flagellar segment, scale 0.1 mm  Figure 6. Trichosiopsis scutellata theae male (holotype), wing, scale 1.0 mm