Urytalpa trivittata ( Lundström, 1914 )

Kjaerandsen, Jostein, Martinsson, Svante, Hedmark, Kjell & Evenhuis, Neal L., 2009, On the genus Urytalpa Edwards (Diptera: Keroplatidae) in the Nordic and Nearctic regions, with fixation of a new type species and a key to world males, Zootaxa 2160 (1), pp. 29-50 : 43-48

publication ID

https://doi.org/ 10.11646/zootaxa.2160.1.2

persistent identifier

https://treatment.plazi.org/id/D75E2A4D-810A-FFD8-FF01-FA49FAAF670C

treatment provided by

Felipe

scientific name

Urytalpa trivittata ( Lundström, 1914 )
status

 

Urytalpa trivittata ( Lundström, 1914) View in CoL

( Figs 2B View FIGURE 2 , 4B View FIGURE 4 , 10A–D View FIGURE 10 , 11C–D View FIGURE 11 )

Platyura trivittata Lundström, 1914:10 View in CoL

Urytalpa trivittata View in CoL ; Bechev & Koç 2008:31, figs 9–10

Diagnosis. Most similar to U. dorsalis but differs by having more slender and less petiolated and less laterally compressed abdomen ( Fig. 2B View FIGURE 2 ) and by having the thoracic stripes distinctly separated. The larger apicomedial outgrowth of the gonocoxite with 5–6 strong setae in a row ( Fig. 10A View FIGURE 10 ) is a distinctive character for this species. Urytalpa dorsalis and U. trivittata differ from the other Nordic species in having gonocoxites without larger outgrowths and the gonostylus is retracted dorsally into the gonocoxites. In U. trivittata , however, the gonostylus is subtriangular in lateral view and somewhat larger ( Fig. 10C View FIGURE 10 ). The female can be separated from U. dorsalis and U. macrocera by the combination of an oblong and petiolated cercus, sternite VIII having truncated apicomedial corners with a narrow setose excavation, and by having distinctly ovate spermathecae with a relatively thin inner wall ( Figs 11C–D View FIGURE 11 ).

Description. Male (n=5). Body length 6.5–8.5, 7.1 (n=10) mm. Wing length 5.14–5.88, 5.5 mm, or 3.24–3.64, 3.39 as long as profemur. Antenna length 2.2–2.64 (n=4) mm. Coloration (specimen in alcohol, Fig. 2B View FIGURE 2 ). Head brown with mouth parts paler. Antenna brown, scape, pedicel and basal part of first flagellomere paler. Thorax yellow with pale antepronotum; dark brown mesonotal stripes distinctly separated, narrowly surrounded by pale yellow ground; humeral area pale, extending laterally to behind wing base. Wings clear, yellow tinged, veins brown. Halter pale. Legs slightly paler than thorax. Abdomen brown; tergites I–V with narrow pale bands apically; tergites VI–IX dark brown; sternites I–V pale; terminalia yellowish brown. Terminalia ( Fig. 10 View FIGURE 10 ). Gonocoxite connected ventrally by a narrow strip only; apically with a distinct apicomedial outgrowth with 5–6 strong setae in a row. Large hypandrial lobe forming thin hyaline plate ventromedially. Gonostylus retracted into gonocoxite, small and subtriangular in lateral view with the tip pointing dorsally. Aedeagal apparatus long but not high, with less compressed plate extending anteriorly into segment V, and long associated apodemes laterally. Tergite IX without outgrowths, apical corner pointed ventrally, without patch of short internal setae; with shallow posterior and deep anterior U-shaped incision. Proctiger small and short, cercus broadly ovate in lateral view.

Female (n=1). Body length 7.5 mm. Wing length 6 mm. Antenna length 1.82–1.86 mm. Coloration. As in male with dark brown mesonotal stripes distinctly separated. Terminalia ( Figs 11C–D View FIGURE 11 ). Cercus oblong and petiolated. Sternite VIII with truncated corners, with a narrow excavation apicomedially covered with short stiff setae. Spermathecae distinctly ovate, spermathecae and ducts with medium thick inner walls.

Remarks. Association of the single female is based on co-occurrence and coloration matching with a male, but deviating slightly from the generic diagnosis in having the A 1 vein fading slightly before the wing edge.

Distribution. European; with scattered records only from Finland, Germany, Italy, Norway and Sweden. Possibly boreal-mountainous with main distribution in northern parts of the boreal zone.

Material examined: ITALY: Pellaud , Vallée de Rhêmes (Aosta), 1800–2000 m a.s.l., 8 Oct 1978 ( MNHN, Leg. L. Matile) — 1 male ; NORWAY: FV, Alta , Detsika, Buolamalia, 69°51'38"N, 023°19'38"E, in sandy slope, 24 Jun–16 Jul 1996 ( ZMUN, Leg. L. O. Hansen & H. Rinden) — 1 male GoogleMaps ; 6 Aug–25 Sep 1996 ( MZLU, Leg. L. O. Hansen & H. Rinden) — 1 female, 3 males GoogleMaps ; SWEDEN: LU, Jokkmokk , Kaltisbäcken 1 km NNE Messaure, 66°41'26"N, 020°22'37"E, 250 m a.s.l., 1–10 Jul 1968 ( MZLU, Leg. K. Müller) — 1 male GoogleMaps ; Kaltisbäcken , loc. 7, Sapta, 10–20 Aug 1968 ( MZLU, Leg. K. Müller) — 1 male ; 21–30 Aug 1968 ( MZLU, Leg. K. Müller) — 11 males ; Kaltisbäcken , loc. 20 ( MZLU, Leg. K. Müller) — 1 male ; Jokkmokk , Messaure, 66°40'57"N, 020°21'48"E, 175 m a.s.l., 6–10 Sep 1968 ( MZLU, Leg. K. Müller) — 2 males GoogleMaps ; Jokkmokk , Kanibäcken, 8 km SE Messaure, 66°36'45"N, 020°27'20"E, 100 m a.s.l., 1–10 Aug 1968 ( MZLU, Leg. K. Müller) — 2 males GoogleMaps ; 6–10 Sep 1968 ( MZLU, Leg. K. Müller) — 3 males GoogleMaps ; Kvikkjokk , along the path to point 749 Prinskullen, 66°57'24"N, 017°41'27"E, 600 m a.s.l., spruce forest dominated by Aconitum lycoctonum , 6 Aug 1997 (Coll. & Leg. K. Hedmark) — 1 male GoogleMaps ; TO, Kiruna , Abisko, 68°21'01"N, 018°49'50"E, LF 5 - 150– 500 m W Naturv. stn., 8–15 Sep 1975 ( MZLU, Leg. K. Müller) — 1 male GoogleMaps .

MNHN

Museum National d'Histoire Naturelle

MZLU

Lund University

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Keroplatidae

Genus

Urytalpa

Loc

Urytalpa trivittata ( Lundström, 1914 )

Kjaerandsen, Jostein, Martinsson, Svante, Hedmark, Kjell & Evenhuis, Neal L. 2009
2009
Loc

Urytalpa trivittata

Bechev, D. & Koc, H. 2008: 31
2008
Loc

Platyura trivittata Lundström, 1914:10

Lundstrom, C. 1914: 10
1914
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