Trichosepedon balkanicum ( Krek, 1970 ), 2019

Kvifte, Gunnar Mikalsen, 2019, New records of Norwegian Psychodidae, with the first description of the female of Trichosepedon balkanicum (Krek, 1970) comb. nov., Norwegian Journal of Entomology 66, pp. 1-10 : 3-5

* Trichosepedon balkanicum ( Krek, 1970)

Philosepedon balkanicus Krek, 1970 — Krek 1970, Vaillant 1974, Omelková & Ježek 2012, Salmela et al. 2014.

Material examined. VESTFOLD: Re, Revedal, Våle , 8–12.IX.2002, 4♂♂, leg. E. Rindahl. AUST-AGDER: Vegårshei, Lauvøya , 58.790366°N, 8.847246°E, 22.VII.2012, 1♂, leg. I. Kvifte. HEDMARK: Rendalen , Sekserbua NØ, 61.5561°N, 11.1686°E, 23. VI –11.VII.2016, 1♂, leg. Rikmyrsprosjektet. Åmot, Kildesaga , 61.1788°N, 11.4022°E, 23. VI –11.VII.2016, 1♂ 1♀, leg. Rikmyrsprosjektet

Description of the female (n=1)

Head ( figure 1A ) round. Eyebridge unconstricted, of four rows of facets; separated by a distance equal to 1.5 facet diameters; interocular suture U-shaped, double. Postocular setae in single, sparse row. Seta alveoli of frons not reaching level of eyebridge. Palp with four segments, fourth segment fully sclerotized.

Wing ( figure 1B ) 2.5 mm long, pointed ovoid, brownish tinted with hyaline area surrounding R 1, membrane with macrotrichia. Sc rectangular, not reaching R 1. R 5 and M 4 with sclerotized outlines. M 1+2 with triangular expansion basally, medial fork with short basal spur. CuA terminating distad of medial fork.

Terminalia ( figure 2B ) with gonocoxal plate bilobed, lacking median digit. Cerci present, longer than width of terminalia. Inner genitalia with two sclerotized chambers, duct with one margin sclerotized, two comma-shaped, partially sclerotized structures and a V-shaped transverse sclerite present near gonopore.

Remarks. First records from Norway. The species has previously been recorded from Bosnia-Herzegovina, Germany, the Czech Republic, Slovakia and Finland.

The surstylus of the herein examined male specimens, as well as comparative material examined from Austria, Germany, Finland and Slovakia appears more curved and elongate than in the illustrations by Vaillant (1974) and Krek (1999). To assess whether this is a taxonomically relevant character, examination of type material or new material from the type locality in the Balkans is neccessary.

The female of T. balkanicum is here described for the first time based on a female associated using DNA barcodes. The COI sequences of the male and female specimens are identical, and the hairy wing membrane and Y-shaped ascoids suggest the association to be correct as well. In BOLD, both specimens cluster in the BIN BOLD:ACR0042, which also comprises seven other specimens from Norway and Germany.

Figures

FIGURE 1. Trichosepedon balkanicum (Krek, 1970) female from Hedmark: Rendalen, Kildesaga. A. Head in frontal view, antennae and palps lacking. B. Wing. Abbreviations: CuA: Cubital-anal vein, j: jugum, M1–M4: Medial veins, R1–R5: radial veins, Sc: Subcosta.

FIGURE 2. A. Male genitalia of Trichosepedon balkanicum (Krek, 1970) from Aust-Agder: Vegårshei, Lauvøya. Abbreviations: aed: aedeagus, apms: aedeagal-parameral sheath, ea: ejaculatory apodeme, gcx: gonocoxite, gst: gonostyle, pbp: parabasal process of gonocoxite, pma: parameral appendage, pmb: parameral bridge, ros: row of spines, sas: subapical setiform sensilla. B. Genitalia of Trichosepedon balkanicum (Krek, 1970) female from Hedmark: Rendalen, Kildesaga. Abbreviations: crc: cerci, gcxp: gonocoxal plate, scgc: sclerotized genital chambers, vts: v-shaped transverse sclerite.