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 bifida ( Hellen , 1948) Nematus (Pristiphora) bifidus Hellen , 1948: 116-117. Lectotype ♀ (http://id.luomus.fi/GL.5214; here designated) in MZH, examined. Type locality: Malla, Kilpisjaervi , Enontekioe , Finland. Similar species. Externally, perhaps the most similar species is P. frigida , from which it can be distinguished by having pale hind trochanters, trochantelli, and tibiae (black or brown in P. frigida ). In addition, antennae of males have numerous and clearly visible stout black setae among finer paler ones (Fig. 36 ), while in P. frigida there are only a few barely visible ones (Fig. 35 ). The lancets (Figs 70-71 ) and penis valves (87-88) are also different. Apical serrulae are somewhat shorter and more protruding and the tangium of the lancet tends to be longer and narrower (Fig. 70 ) than in P. frigida (Fig. 71 ). The penis valve lacks (Fig. 87 ) a membranous fold near the tip of the ventro-apical spine (present in P. frigida ; Fig. 88 ) and the pseudoceps has a distinct dorsal depression in the middle or basal part (absent in P. frigida ). Genetic data. Based on COI barcode sequences, P. bifida belongs to the same BIN cluster (BOLD:AAG3568) as P. aphantoneura , P. confusa , P. luteipes , P. opaca , P. pusilla , P. staudingeri , and P. subopaca (Fig. 1 ). The nearest neighbour (BOLD:AAQ2302, P. armata and P. leucopus ) is 2.76% different. Only one partial TPI sequence (sequencing of the first exon and part of the following intron failed apparently because of intron length polymorphism) of P. bifida is available, which can be distinguished from other species (Fig. 2 ). Host plants. Salix viminalis L. ( Liston and Burger 2009 ). In Kilpisjaervi (Finland) some other species must be the host, as S. viminalis does not occur there. Distribution and material examined. Western Palaearctic. Specimens studied are from Finland , Germany , Norway , and Sweden . According to the BOLD database, this species may also be present in North America. The identifications of North American specimens falling within BIN cluster BOLD:AAG3568 are however uncertain.