North-Western Palaearctic species of the Pristiphora ruficornis group (Hymenoptera, Tenthredinidae) Author Prous, Marko https://orcid.org/0000-0002-5329-7608 Senckenberg Deutsches Entomologisches Institut, Eberswalder Strasse 90, 15374 Muencheberg, Germany & Department of Zoology, Institute of Ecology and Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia mprous@ut.ee Author Vikberg, Veli Liinalammintie 11 as. 6, FI- 14200 Turenki, Finland Author Liston, Andrew Senckenberg Deutsches Entomologisches Institut, Eberswalder Strasse 90, 15374 Muencheberg, Germany Author Kramp, Katja Senckenberg Deutsches Entomologisches Institut, Eberswalder Strasse 90, 15374 Muencheberg, Germany text Journal of Hymenoptera Research 2016 2016-08-29 51 1 54 http://dx.doi.org/10.3897/jhr.51.9162 journal article http://dx.doi.org/10.3897/jhr.51.9162 1314-2607-51-1 B3D68EDB9CF844A3BC43E9C2D6626BD7 FFCF966B691BFFC1FF950C14486D5B5D 147922 Pristiphora frigida (Boheman, 1865) Nematus frigidus Boheman, 1865: 568-569. Lectotype ♂ (NHRS-HEVA000005005; here designated) in NHRS, examined. Type locality: "Middel Hook in Belsund" (Spitsbergen Island), Svalbard, Norway. Pristiphora Adelungi [sic!] Konow, 1902: 162, 167-168. Lectotype ♀ (DEI-GISHym30151; here designated) in ZIN, examined. Type locality: Hornsund (Spitsbergen Island), Svalbard, Norway. Note. Additional male specimen of P. adelungi labelled as "TYPE" is deposited in SDEI. Since this specimen lacks labels with detailed information given in the original description, its type status remains uncertain. Similar species. Externally, perhaps the most similar species is P. bifida , from which it can be distinguished by having black or brown hind trochanters, trochantelli, and tibiae (pale in P. bifida ). In addition, antennae of males have only some barely visible stout black setae among finer paler ones (Fig. 35 ), while these are numerous and clearly visible in P. bifida (Fig. 36 ). On the other hand, the penis valve (Fig. 88 ) might indicate a closer relationship to P. melanocarpa and P. ruficornis (Figs 79-82 ), because of a membranous fold near the tip of the ventro-apical spine that is missing in other species of Pristiphora ruficornis group. The tangium of the lancet (Fig. 71 ) also resembles more closely the Betula feeding P. melanocarpa and P. ruficornis (Figs 46 - 53 ) rather than P. bifida (Fig. 70 ): the dark sclerotized area is rather broader than long instead of longer than broad. Genetic data. No data. Host plants. Unknown. Distribution and material examined. Western Palaearctic. Specimens studied are from Norway ( Svalbard ).