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).