Panimerus albifacies (Tonnoir, 1919)

Jaume-Schinkel, Santiago, Kvifte, Gunnar Mikalsen, Njunjic, Iva & Schilthuizen, Menno, 2023, New records of moth flies (Diptera, Psychodidae) for the Dutch Fauna, Biodiversity Data Journal 11, pp. 108636-108636 : 108636

Panimerus albifacies (Tonnoir, 1919)

Pericoma albifacies Tonnoir, 1919. Tonnoir (1919): 12. TL. Belgium, Brussels.

Telmatoscopus albifacies Tonnoir: Freeman (1950): 86, Jung (1956): 181, Duckhouse (1962): 419, Vaillant (1972): 69, Withers (1989): 32

Telmatoscopus (Panimerus) albifacies Tonnoir: Tonnoir (1940): 22, Vaillant (1961): 135.

Panimerus albifacies Tonnoir: Krek (1999): 152.

Description

Figures

Fig. 1 A-C

Examined Material

1 ♀. The Netherlands, Amsterdam, Vondelpark 52.3578°N, 4.8671°E. 19.VII.2019-27.VII.2019. Leg. Taxon Expeditions Team, ZFMK-TIS-2638055 (OR139013) [ZFMK]; 1 ♂ same data as preceding, except 3.VI.2019-12.VI.2019. Leg. van der Meer, Marrit, ZFMK-TIS-2638076 (OR139014) [ZFMK]; 2 ♂♂ same data as preceding, except 21.VI.2019-25.VI.2019. ZFMK-TIS-2638086 (OR139004), ZFMK-TIS-2638094 (OR139007) [TXEX].

Diagnosis

Females of P. albifacies can be easily differentiated from the known females of the genus by the shape of sternite 8 and the shape of the genital chamber Fig. 1 (A-C). Males can be easily differentiated from other males of the genus by the presence of 9 apical tenacula in the surstyli (8, 9 or more than 20 in other species), the hypandrium setose and by the ejaculatory apodeme angular laterally and rounded anteriorly (as in Vaillant (1972): plate IX).

Female redescription

Sternite 8 (subgenital plate) is wider than its length, with the anterior margin being 2.5 times wider than the posterior margin, it is covered in small setae with a few scattered larger setae on the dorsal surface, two lateral concavities right before the posterior margin, forming two lobes separated by a concavity in the posterior margin. The cerci are longer than sternite 8. The genital chamber is symmetrical as in Fig. 1 A-C.

Based on the male description by Tonnoir (1919) and Jung (1956), the female is similar to the male, except the eye bridge is separated by eight facet diameters; the head is without corniculi; the pedicel is symmetrical; the flagellomeres are smaller than those of the male; apical antennal flagellomeres are absent in examined material.

Genetics

four specimens were successfully sequenced: ZFMK-TIS-2638055 (OR139013), ZFMK-TIS-2638076 (OR139014), ZFMK-TIS-2638086 (OR139004) and ZFMK-TIS-2638094 (OR139007). The maximum intraspecific uncorrected pairwise distance for COI sequences was 0.31% or 1 bp.

Distribution

Belgium, Bosnia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Ireland, Lithuania, Romania, Switzerland, The Netherlands and Turkey ( Vaillant 1972, Krek 1972, Salmela and Piirainen 2005, Bernotienė and Rimšaitė 2009, Ježek 2009, Wagner 2013, Wagner et al. 2013, Ježek et al. 2021).

Notes

Tonnoir (1919) stated that the female of P. albifacies (Tonnoir, 1919) differs from the female of P. goetghebueri by the colouration of the setae on the thorax, head and the base of the antennae (with white spots in P. albifacies and mainly black in P. goetghebueri ). However, Freeman (1950) stated that the female of P. notabilis is indistinguishable from those of P. albifacies and P. goetghebueri . Later, Jung (1956) provided a diagnosis and an illustration of the female of P. albifacies ( Jung 1956: fig. 238). Based on the published female diagnosis, the drawings provided by Jung (1956) and the re-descriptions and figures herein, the females of P. albifacies and P. goetghebueri can be differentiated by the shape of sternite 8 (anterior margin being 2.5 times wider than the posterior margin in P. albifacies and anterior margin 4 times wider than posterior in P. goetghebueri ); the shape of the genital chamber ( P. albifacies , Fig. 1 A-C and P. goetghebueri , Fig. 1 D-E). However, there is still a large gap when it comes to the description of females of the genus Panimerus and further studies could provide better diagnostic characters to easily differentiate the female specimens. Meanwhile, COI barcodes can be useful when it comes to delimiting undescribed females and associating them with previously described and barcoded male specimens.

Vaillant (1972) female diagnosis refers to the female description of Tonnoir (1919).

Figures

Figure 1. Figure 1. A-C Panimerus albifacies female: A. Genitalia, B. Subgenital plate, C. Genital chamber. D-F Panimerus goetghebueri female: D. Genitalia, E. Subgenital plate, F. Genital chamber. All scale bars equal 0.10 millimetres.