Trichosiopsis sveae

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Taxonavigation

Ordo: Diptera
Familia: Sciaridae
Genus: Trichosiopsis

Name

Trichosiopsis sveae  unpublished

Type material

Holotype: ♂, 13.3.–20.3.2014, Malaise trap, leg. Kassebeer, ZFMK-TIS-2583561 in ZFMK

Type locality

Germany, Schleswig-Holstein, Oldenburg, Putlos

Barcoded material

Stadium Country Province Locality Habitat Method Date Collector Collection Number Collection Latitude Longitude Elevation (m)
1 ♂ (holotype) Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 13.3.–20.3.2014 Christian Kassebeer ZFMK-TIS-2583561 ZFMK 54.3166 10.8022 20
1 ♀ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 13.3.–20.3.2014 Christian Kassebeer ZFMK-TIS-2583564 ZFMK 54.3166 10.8022 20
1 ♀ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 13.3.–20.3.2014 Christian Kassebeer ZFMK-TIS-2583562 ZFMK 54.3166 10.8022 20
1 ♀ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 31.8.–7.9.2014 Christian Kassebeer ZFMK-TIS-2583537 ZFMK 54.3166 10.8022 20
1 ♀ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 31.8.–7.9.2014 Christian Kassebeer ZFMK-TIS-2583536 ZFMK 54.3166 10.8022 20
1 ♀ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 31.8.–7.9.2014 Christian Kassebeer ZFMK-TIS-2583532 ZFMK 54.3166 10.8022 20
1 ♂ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 31.8.–7.9.2014 Christian Kassebeer ZFMK-TIS-2583531 ZFMK 54.3166 10.8022 20
1 ♀ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 20.4.–27.4.2014 Christian Kassebeer ZFMK-TIS-2583528 ZFMK 54.3166 10.8022 20
1 ♀ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 20.4.–27.4.2014 Christian Kassebeer ZFMK-TIS-2583527 ZFMK 54.3166 10.8022 20
1 ♂ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 27.4.–4.5.2014 Christian Kassebeer ZFMK-TIS-2583504 ZFMK 54.3166 10.8022 20
1 ♂ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 27.4.–4.5.2014 Christian Kassebeer ZFMK-TIS-2583503 ZFMK 54.3166 10.8022 20
1 ♀ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 6.10.–13.10.2014 Christian Kassebeer ZFMK-TIS-2583487 ZFMK 54.3166 10.8022 20
1 ♂ Germany Schleswig-Holstein Oldenburg, Putlos Truppenübungsplatz Malaise trap 30.3.–6.4.2014 Christian Kassebeer ZFMK-TIS-2583476 ZFMK 54.3166 10.8022 20

Other material studied

Germany: 1 ♂, Schleswig-Holstein, Putlos, Truppenübungsplatz, Malaise trap, Kassebeer, 14.-21.09.2014, PKHH 8817; The Netherlands: 3 ♂, Terschelling, Primärdünensukzession "groenplak", photoeclector, Vogels, 3.-17.04.2002, PKHH 4087/4088; 3 ♀, PKHH 4089; 1 ♂, 17.4.-06.05.2002, PKHH 4094.

Description (male)

Head. Eye bridge 4–5 rows of facets. Antenna unicolour. LW-index of 4th flagellomere 1.61–1.9; neck 0.2–0.28 × segment width; transition of basal part to neck pronounced. Colour of neck unicolour. Antennal setae shorter than segment width; fine; dense; adjacent. Palpus darkened; of normal length; palpomeres 3. First palpomere of normal shape; with 6–9 setae; with only sparse sensilla. Second palpomere short and oval. Third palpomere as long as first. Thorax. Colour brown. Notum unicolour. Thoracic setae normal; brown, or white, or of different colours. Posterior pronotum setose. Postpronotal setae 3–4; fine. Mesothoracic sclerites bare. Legs. Colour yellow-brown, or brown. Hind coxa of same colour as femora. Setae on front coxa pale. Front tibial organ as patch of setae; pale; front tibial organ not bordered. Tibial setae on hind legs normal, shorter than tibial width. Tibial spurs of equal length. Claws untoothed. Wing. Wing hyaline; with conspicuous anal lobe, or 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 setose; r-m mostly setose; bM:r-M 0.96–1.16; st-Cu:bM 0.27–0.37; R1:R 1.4–1.7; c:w 0.55–0.65. Halter darkened; of normal length. Abdomen. Abdominal setae on tergites black; sternites white. Hypopygium concolour with abdomen; LW-index 0.57–0.67. 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. Gonostylus elongate; LW-index 2.3–2.45; Inner margin concave; apex equally rounded. Apical tooth present; without internal structure; of medium strength; LW-Index 1.5–2.4. Awl-like setae normal; present beneath apical tooth. Megasetae absent. Whiplash-hair absent. Tegmen rectangular with rounded edges; without special features; central process absent. Length of ejaculatory apodeme/hypopygium 19–27 %; base of ejaculatory apodeme present. Field with aedeagal teeth clearly visible. Measurements. Body size 3.5–4.5 mm. Hind tibia 1.55–1.75 mm. Wing length 2.8–3.6 mm.

Diagnosis

This is another typical species of the Trichosiopsis trochanterata complex, characterized by an elongate, tapered gonostylus and partly bright body hairs. It is similar to Trichosiopsis saltuum by the hyaline wings and the darkened legs. However, the characteristic shape and colouration of the tegmen allow an easy recognition.

DNA Barcoding

The COI sequence is assigned to BIN BOLD:ADG3080 (average distance 0.27%, max. 0.86%, n=13, K2P: 10.88%).

Etymology

The species is named after Svea, the daughter of the dipterist Christian Kassebeer, who collected the specimens.

Discussion

The finding of Trichosiopsis sveae demonstrates, that there are still a lot more species to be expected in what was formerly considered Tr. trochanterata. It proved to be very common at the type locality and may be typical for sandy dune habitats, because on the island Terschelling, Netherlands it was collected in the same kind of habitat.

The species has a very distinct DNA barcode and is not very close to the other members of the species complex.

Distribution

Germany, Netherlands.

Images

Figure 1. Trichosiopsis sveae male (holotype), habitus, scale 1.0 mm
Figure 1. Trichosiopsis sveae male (holotype), habitus, scale 1.0 mm 
Figure 2. Trichosiopsis sveae male (holotype), hypopygium (holotype), scale 0.1 mm
Figure 2. Trichosiopsis sveae male (holotype), hypopygium (holotype), scale 0.1 mm 
Figure 3. Trichosiopsis sveae male, gonostylus, scale 0.1 mm
Figure 3. Trichosiopsis sveae male, gonostylus, scale 0.1 mm 
Figure 4. Trichosiopsis sveae male (holotype), aedeagal complex, scale 0.1 mm
Figure 4. Trichosiopsis sveae male (holotype), aedeagal complex, scale 0.1 mm 
Figure 5. Trichosiopsis sveae male (holotype), 4th antennal flagellomere, scale 0.1 mm
Figure 5. Trichosiopsis sveae male (holotype), 4th antennal flagellomere, scale 0.1 mm 
Figure 6. Trichosiopsis sveae male (holotype), palpus, scale 0.1 mm
Figure 6. Trichosiopsis sveae male (holotype), palpus, scale 0.1 mm 
Figure 7. Trichosiopsis sveae male (holotype), wing, scale 1.0 mm
Figure 7. Trichosiopsis sveae male (holotype), wing, scale 1.0 mm 

References

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