Leptospina dentata

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Taxonavigation

Ordo: Diptera
Familia: Sciaridae
Genus: Leptospina

Name

Leptospina dentata (Mohrig & Krivosheina, 1979) – Wikispecies link – ZooBank link

  • Trichosia (Leptosciarella) dentata Mohrig & Krivosheina, 1979[1]: 573-574, fig. 2
  • Leptosciarella (Leptospina) dentata (Mohrig & Krivosheina, 1979)[2]: 86-87, fig. 37

Type material

Holotype: ♂, 17.06.1969, leg. Krivosheina, PWMP 4022.

Type locality

Russia, Primorsk Region, Nature Reserve Ussuriysk

Material studied

Russia: 1 ♂, Primorsk Region, 12.07.1969, Mamaev, PWMP 4023.

Description (male)

Head. Eye bridge 4 rows of facets. LW-index of 4th antennal flagellar segment 2.5–2.9; neck 0.22–0.33 of segment width; Transition of basal part to neck pronounced. Colour of neck unicolour. Antennal hairs shorter than segment width; dense; salient. Palps darkened; normal; palpomeres 3. First palpomere of normal shape; with 3–4 bristles; with only some sparse sensillae. Second palpomere shortly oval. Third palpomere as long as first segment. Thorax. Colour brown. Notum unicolour. Thoracic setae normal, or weak; bright. Mesonotum with some weaker central bristles. Posterior pronotum setose. Postpronotal setae 1–3; fine. Mesothoracic sclerites bare. Legs. Colour yellow. Hind coxae of same colour as femora. Hairs on fore coxae bright. Front tibia apically with a patch of setae. Front tibial organ dark. Front tibial organ not bordered. Tibial setae on hind legs normal, shorter than tibial width. Tibial spurs of equal length. Claws untoothed. Wings. Wings slightly darkened; of normal shape. Wing membrane without macrotrichia. Wing venation weak, with faint m-base. M-fork of normal shape. R1 inserting at or slightly before base of m-fork; posterior veins bare; bM bare; r-m with a few setae; bM:r-M 0.7–0.81; st-Cu:bM 0.48–0.58; r1:r 1.2–1.5; C:w 0.54–0.64. Halteres dark; of normal length. Abdomen. Abdominal setae weak; dorsally white; ventrally white. Hypopygium concolour with abdomen; 0.65–0.75 × longer than wide. Base of gonocoxites with normal, weak hairs; gonocoxites forming an inverse V; inner margin of gonocoxites normally U-shaped; inner membrane of hypopygium scarcely setose; elongated setae on valves of hypopygium absent. Gonostylus elongate; 1.95–2.2 × longer than wide; Inner margin straight; apex with one obtuse angle. Apical tooth present; 2.8–3.2 × longer than broad; strong. Awl-like setae long; on inner side of gonostyles absent. Megasetae on inner part of gonostylus absent. Whiplash-hair absent. Tegmen 0.68–0.8 × longer than broad; equally rounded; normal; Central process absent. Length of aedeagus/hypopygium 15–25 %; Aeadeagal apical structure present. Measurements. Body size 3.2–3.8 mm. Hind tibia 1.52–1.63 mm. Wing length 2.6–3.2 mm.

Diagnosis

Leptospina dentata is characterized by the non setose wing veins, the bright body hairs and the extremely long awl-like setae (which appear to be megasetae) dorsally of the also very long apical tooth. Such elongated awl-like setae are typical for Leptospina, but are only similarly long in Leptospina lobodentata, which is the most similar species and can be distinguished by the dorsal apical lobe at the gonostyli as an extra ornamental structure.

DNA Barcoding

The COI sequence is assigned to BIN BOLD:ACD5220 (n=1, K2P: 10.54%).

Discussion

Le. dentata is the type species of the Leptospina. Species of this genus seem to be distributed mainly in the Eastern Palaearctic Region, where still more species with elongated dorsal setae may be expected.

Etymology

lat. dens = tooth; making reference to tooth-like elongated setae on the gonostyli.

Ecology

Leptosciarella dentata was found in forests.

Distribution

Korea[3], Russia[1][2].

Images

Figure 1. Leptospina dentata male, habitus, scale 1 mm
Figure 1. Leptospina dentata male, habitus, scale 1 mm 
Figure 2. Leptospina dentata male, hypopygium (holotype), scale 0.1 mm
Figure 2. Leptospina dentata male, hypopygium (holotype), scale 0.1 mm 
Figure 3. Leptospina dentata male, hypopygium, scale 0.1 mm
Figure 3. Leptospina dentata male, hypopygium, scale 0.1 mm 
Figure 4. Leptospina dentata male, gonostylus (ventral view), scale 0.1 mm
Figure 4. Leptospina dentata male, gonostylus (ventral view), scale 0.1 mm 
Figure 5. Leptospina dentata male, gonostylus (dorsal view), scale 0.1 mm
Figure 5. Leptospina dentata male, gonostylus (dorsal view), scale 0.1 mm 
Figure 6. Leptospina dentata male, aedeagal complex, scale 0.1 mm
Figure 6. Leptospina dentata male, aedeagal complex, scale 0.1 mm 
Figure 7. Leptospina dentata male, 4th antennal flagellar segment, scale 0.1 mm
Figure 7. Leptospina dentata male, 4th antennal flagellar segment, scale 0.1 mm 
Figure 8. Leptospina dentata male, palpus, scale 0.1 mm
Figure 8. Leptospina dentata male, palpus, scale 0.1 mm 
Figure 9. Leptospina dentata male, wing, scale 1 mm
Figure 9. Leptospina dentata male, wing, scale 1 mm 

References

  1. ↑ 1.0 1.1 Mohrig, W.; Mamaev, B.; Krivosheina, N. 1979: Neue Arten holzverwertender Sciariden (Diptera) aus der UdSSR. Zoologische Jahrbücher, Abteilung für Systematik, Ökologie und Geographie der Tiere, 106, 572–588.
  2. ↑ 2.0 2.1 Mohrig, W.; Menzel, F. 1997: Revision der paläarktischen Arten von Trichosia Winnertz sensu Tuomikoski, 1960 (Diptera, Sciaridae). – Teil II. Gattungen Leptosciarella Tuomikoski, 1960 und Trichodapus gen. nov. Studia dipterologica, 4(1), 41–98.
  3. ↑ Shin, S. 2013, February: Systematic study of Sciaridae (Diptera: Sciaroidea) in the Korean Penisula, with discussion of Larval habitats evolution. Dissertation, Seoul National University, Seoul.
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