Trichosiopsis opilio

Taxonavigation

Ordo: Diptera
Familia: Sciaridae
Genus: Trichosiopsis

Name

Trichosiopsis opilio  unpublished

Type material

Holotype: ♂, 4.6.–1.7.2016, Malaise trap, leg. Salmela, ZFMK-TIS-2531982 in ZFMK

Type locality

Finland, Lapland, Savukoski, Urho Kekkonen National Park

Barcoded material

Stadium	Country	Province	Locality	Habitat	Method	Date	Collector	Collection Number	Collection	Latitude	Longitude	Elevation (m)
1 ♂ (holotype)	Finland	Lapland	Savukoski, Urho Kekkonen National Park	pine forest	Malaise trap	4.6.–1.7.2016	Jukka Salmela	ZFMK-TIS-2531982	ZFMK	68.117	28.55
1 ♂	Finland	Lapland	Savukoski, Tyroja	spruce forest	Malaise trap	5.8.–16.9.2014	Jukka Salmela	ZFMK-TIS-2547908	ZFMK	68.133	28.633
1 ♂	Finland	Lapland	Savukoski, Tyroja	spruce forest	Malaise trap	5.8.–16.9.2015	Jukka Salmela	ZFMK-TIS-2547909	ZFMK	68.133	28.633
1 ♂	Finland	Lapland	Savukoski, Tyroja	spruce forest	Malaise trap	5.8.–16.9.2015	Jukka Salmela	KH8744	PKHH	68.133	28.633
1 ♂	Finland	Lapland	Savukoski, Tyroja	spruce forest	Malaise trap	5.8.–16.9.2015	Jukka Salmela	JS86	LMM	68.133	28.633

Other material studied

Finland: 2 ♂, Lapland, Savukoski, Tyroja, spruce forest, Malaise trap, Salmela, 15.08.-13.09.2015, PKHH 8744, LMM 86.

Description (male)

Head. Eye bridge 3 rows of facets. Antenna unicolour. LW-index of 4^th flagellomere 1.85–2; neck 0.25–0.35 × segment width; transition of basal part to neck pronounced. Colour of neck unicolour. Antennal setae shorter than segment width; of normal strength; dense; adjacent. Palpus darkened; short, or of normal length; palpomeres 3. First palpomere of normal shape; with 1–3 setae; with only sparse sensilla. Second palpomere globular. Third palpomere as long as first. Thorax. Colour brown. Notum unicolour. Thoracic setae normal; brown. Posterior pronotum bare, or setose. Postpronotal setae 0–2; strong. Mesothoracic sclerites bare. Legs. Colour yellow-brown. Hind coxa of same colour as femora. Setae on front coxa darkened. Front tibial organ as patch of setae; dark; front tibial organ not bordered. Tibial setae on hind legs weak and inconspicuous. 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 with a few macrotrichia; CuA₁ and CuA₂ mostly with macrotrichia; bM bare; r-m with few setae; bM:r-M 1.15–1.3; st-Cu:bM 0.15–0.25; R₁:R 1.3–1.5; c:w 0.68–0.78. Halter darkened; of normal length. Abdomen. Abdominal setae strong; dense; on tergites black; on sternites black. Hypopygium concolour with abdomen; LW-index 0.5–0.7. Base of gonocoxites with weak setae; gonocoxites broadly separated; inner margin of gonocoxites typically U-shaped; inner membrane of hypopygium scarcely setose; ventral margin of gonocoxite with short setae. LW-index 1.85–2.1; Inner margin concave; apex equally rounded, or with two obtuse angles. Apical tooth present; without internal structure; of medium strength; LW-Index 2–3. Awl-like setae normal, or short; beneath apical tooth absent. Megasetae absent. Whiplash-hair absent. Tegmen 0.7–0.9 × longer than broad; trapezoid; without special features; central process absent. Length of ejaculatory apodeme/hypopygium 21–31 %. Field with aedeagal teeth inconspicuous. Measurements. Body size 2.8–3.5 mm. Hind tibia 1.3–1.4 mm. Wing length 2.8–3.6 mm.

Diagnosis

By the apically and dorsally rounded gonostylus Trichosiopsis opilio is placed in the Trichosiopsis viatica group. It is most similar to Trichosiopsis famosa. Both species have a high and trapezoid, rugose tegmen. Tr. opilio is somewhat smaller and shows some reduction tendencies. The palpus is shorter than in Tr. famosa and the m-stem is covered with only very few macrotricha. The characteristic gonostylus is thicker than in Tr. famosa and two-angulate like in Trichosiopsis renati and Trichosiopsis belingi.

DNA Barcoding

The COI sequence is assigned to BIN BOLD:ACU4752 (average distance 0.31%, max. 0.46%, n=3, K2P: 9.97%).

Etymology

lat. opilio = shepherd. The name is dedicated to a person named Schäfer, the German translation of shepherd.

Distribution

Finland.

Images

Figure 1. Trichosiopsis opilio male (holotype), habitus, scale 1.0 mm  Figure 2. Trichosiopsis opilio male , hypopygium (holotype), scale 0.1 mm  Figure 3. Trichosiopsis opilio male, gonostylus, scale 0.1 mm  Figure 4. Trichosiopsis opilio male, aedeagal complex, scale 0.1 mm  Figure 5. Trichosiopsis opilio male (holotype), 4th antennal flagellomere, scale 0.1 mm  Figure 6. Trichosiopsis opilio male (holotype), wing, scale 1.0 mm