Psenulus schencki ( Tournier, 1889 )

Frey, David, Gayubo, Severiano Fernández, Mokrousov, Mikhail, Zanetta, Andrea, Řiha, Martin, Moretti, Marco & Cornejo, Carolina, 2019, Phylogenetic notes on the rare Mediterranean digger wasp Psenulus fulvicornis (Schenck, 1857) (Hymenoptera: Crabronidae) new to Switzerland, Revue suisse de Zoologie 126 (1), pp. 27-42 : 32

Psenulus schencki ( Tournier, 1889)

1 female; city of Zurich ( CH: ZH); private garden; 47.3692°N, 8.5061°E, ca. 428 m a.s.l.; 25.05.2015; D. Frey & A. Zanetta leg.; M. Řiha det.; R. Neumeyer conf.; WSL coll.; DNA-ID PHP16-0493; GenBank accession Nr . KY039439 ( Figs 2 , 3 ). – 1 female; Anapa, Djemete ( RU: Krasnodar); shrubby coastal sand dunes; 44.961107°N, 37.281649°E; ca. 15.06.2014; M. Mokrousov leg. & det.; DNA-ID PSC-10; GenBank accession Nr . MG 872073 . 1 female; Barkhan Sarykum ( RU: Dagestan); on the leaves of Ailanthus altissima ; 43.002435°N, 47.237245°E; ca. 30.05.2017; M. Mokrousov leg. & det.; DNA-ID PSC-11; GenBank accession Nr . MG 872074 .

Figures

Fig. 2. (A) Female Psenulus fulvicornis (Schenck, 1857) from the City of Zurich, Switzerland (D. Frey & A. Zanetta leg.; M. Řiha det.; R. Neumeyer conf.; WSL coll; GenBank accession Nr. KY039438). (B) Female Psenulus schencki (Tournier, 1889) from the City of Zurich (25.05.2015; D. Frey & A. Zanetta leg.; M. Řiha det.; R. Neumeyer conf.; WSL coll; GenBank accession Nr. KY039439). Note the (barely visible) oblong spot at the lower end of the mid-tibia, which is a unique and shared character for both taxa among Central European Psenulus species (Jacobs, 2007).

Fig. 3. Main discriminant characters between females of Psenulus fulvicornis (Schenck, 1857) and P. schencki (Tournier, 1889). (A) Propodeal surface and (B) pygidial area of P. fulvicornis from the City of Zurich, Switzerland (D. Frey & A. Zanetta leg.; M. Řiha det.; R. Neumeyer conf.; WSL coll; GenBank accession Nr. KY039438). (C) Propodeal surface and (D) pygidial area of P. schencki from the City of Zurich (25.05.2015; D. Frey & A. Zanetta leg.; M. Řiha det.; R. Neumeyer conf.; WSL coll; GenBank accession Nr. KY039439). In P. fulvicornis, the lateral surface of the propodeum (A) has short crosswise carinas which gives the texture coarse appearance. This character is unique among females of Central European Psenulus. In P. schencki such crosswise carinas are lacking (C), and the texture is finer. The pygidal area is longer and broader in P. fulvicornis (B) than in P. schencki (D), but this character can be difficult to observe in certain specimens.