Trichosiopsis helvetica

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Taxonavigation

Ordo: Diptera
Familia: Sciaridae
Genus: Trichosiopsis

Name

Trichosiopsis helvetica (Rudzinski, 1992) – Wikispecies link – ZooBank link

  • Trichosia helvetica Rudzinzki, 1992[1] 32-33, fig. 2
  • Leptosciarella (Leptosciarella) helvetica (Rudzinzki 1992)[2]: 67 fig. 14

Type material

Holotype ♂, no 633 in ZSMC, leg. Thaler, 19.08.1980

Type locality

Switzerland, Graubünden, Ramosch, Clisot Charbunera

Description (male)

see under the subspecies

Diagnosis

Trichosiopsis helvetica differs from the typical species of the genus by the long and numerous awl-like setae on the inner side and on the apical part of the gonostyli, which are nearly as long as the apical tooth. Tr. helvetica is also peculiar for often having a whip-lash seta in the apical part of the gonostylus.

DNA Barcoding

COI sequences are assigned to the following BINs:

Etymology

helveticus lat. = from Switzerland

Ecology

Trichosiopsis helvetica is a rare species with an apparently boreo-montane distribution. The collection localities in the Alps and the Tatra mountains lie all higher than 1000 m and the Finnish collection places more northern than 60° N.

Distribution

Finland[3], Germany[2], Slovakia[2], Switzerland[1].

Discussion

Tr. helvetica is a remarkable species and its placement in the genus may be disputed. Long awl-like setae are also present in Leptospina, but these are confined to the region above or around the apical tooth and not reaching far downwards. Long setae on the inner side of the gonostyli are present in the difficult species Scythropochroa multispinosa and Leptosciarella opaca from which Tr. helvetica is distinguished by the genus-typical presence of macrotrichia on the posterior wing veins. Another peculiar character is the presence of an elongated seta (whip-lash hair), which is a common character in Lycoriella and Pseudolycoriella but is rarely found in other genera of Sciaridae. In Trichosiopsis it is otherwise only present in Trichosiopsis flagellata.

The species is divided in two different subspecies, which are morphologically and genetically distinguishable and probably even have an allopatric distribution. Some of the records from the literature need to be verified according to the assignment to one of the subspecies. However, it seems to be probable that all Central European records belong to the nominotypical subspecies and the Finnish records to Tr. helvetica sami.

Subspecies list

Trichosiopsis helvetica helvetica - Trichosiopsis helvetica sami

Images

Figure 1. Trichosiopsis helvetica helvetica male, hypopygium, scale 0.1 mm
Figure 1. Trichosiopsis helvetica helvetica male, hypopygium, scale 0.1 mm 
Figure 2. Trichosiopsis helvetica helvetica male, gonostylus ventral, scale 0.1 mm
Figure 2. Trichosiopsis helvetica helvetica male, gonostylus ventral, scale 0.1 mm 
Figure 3. Trichosiopsis helvetica helvetica male, gonostylus dorsal, scale 0.1 mm
Figure 3. Trichosiopsis helvetica helvetica male, gonostylus dorsal, scale 0.1 mm 
Figure 4. Trichosiopsis helvetica sami male, hypopygium, scale 0.1 mm
Figure 4. Trichosiopsis helvetica sami male, hypopygium, scale 0.1 mm 
Figure 5. Trichosiopsis helvetica sami male, gonostylus, scale 0.1 mm
Figure 5. Trichosiopsis helvetica sami male, gonostylus, scale 0.1 mm 
Figure 6. Trichosiopsis helvetica sami male, aedeagal complex, scale 0.1 mm
Figure 6. Trichosiopsis helvetica sami male, aedeagal complex, scale 0.1 mm 
Figure 7. Trichosiopsis helvetica sami male, 4th antennal flagellar segment, scale 0.1 mm
Figure 7. Trichosiopsis helvetica sami male, 4th antennal flagellar segment, scale 0.1 mm 
Figure 8. Trichosiopsis helvetica sami male, head, scale 0.1 mm
Figure 8. Trichosiopsis helvetica sami male, head, scale 0.1 mm 
Figure 9. Trichosiopsis helvetica sami male, wing (holotype), scale 1 mm
Figure 9. Trichosiopsis helvetica sami male, wing (holotype), scale 1 mm 

References

  1. ↑ 1.0 1.1 Rudzinski, H.-G. 1992: Zwei neue Trauermücken aus den Alpen (Diptera, Nematocera, Sciaridae). Nachrichtenblatt der Bayerischen Entomologen, 41, 30–33.
  2. ↑ 2.0 2.1 2.2 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. ↑ Salmela, J.; Vilkamaa, P. 2005: Sciaridae (Diptera) from central Finland: faunistics and taxonomy. Entomologica Fennica, 16, 287–300.
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