Pristiphora subbifida (Thomson, 1871)

Lønnve, Ole Jørgen & J .., O., 2009, Notes on Norwegian sawflies (Hymenoptera, Symphyta) II. 13 species new to the Norwegian Fauna, Norwegian Journal of Entomology 56, pp. 50-56 : 54

* Pristiphora subbifida (Thomson, 1871)

Record: AK, Oslo: Gressholmen , 9 May 1993, 1♀ leg. Berg, Ø.

Notes: The hostplant is Acer campestre ( Liston, 2008) . A. campestre is introduced and naturalised some places in Norway. As far as known, A. campestre is not present at Gresholmen (Bjureke per. com.). Gressholmen is one of many small islands in the inner part Oslofjord, and the conditions here should be good for A. campestre . A. pseudoplatanoides can also probably be utilized as a hostplant for P. subbifida , but this requires confirmation ( Liston, 2008). A. pseudoplatanoides is also introduced and naturalised many places in Norway, and reported at some of the islands nearby Gressholmen.

Acnowledgements. I want to thank all colleagues for collecting sawfly material, especially: Kai Berggren, Tor Jan Olsen, Erik Heibo, Øivind Gammelmo, Lars Ove Hansen, Stefan Olberg, Anders Endrestøl, Halvard Hatlen, Svein Svendsen, Bjørn A. Sagvolden, Leif Aarvik, Frode Ødegaard, Øistein Berg, Kjell Magne Olsen, Karsten Sund, John Skartveit and Audun Eikeland.