Pristiphora reuteri (Lindqvist, 1960)

Prous, Marko, Kramp, Katja & Liston 1, Veli VikbergAndrew, 2017, North-Western Palaearctic species of Pristiphora (Hymenoptera, Tenthredinidae), Journal of Hymenoptera Research 59, pp. 1-190 : 53

Pristiphora reuteri (Lindqvist, 1960) Figs 208, 308

Lygaeonematus (Lygaeophora) reuteri Lindqvist, 1960b: 33-34. Holotype ♀ (DEI-GISHym31676) in MZH, examined. Type locality: Munksnäs, Uusimaa, Finland.

Similar species.

Species limits in the micronematica group are still unclear.

Genetic data.

Based on COI barcode sequences, specimens of the micronematica group belong to the BIN cluster BOLD:ACG2488. Maximum distance within the BIN is 2.45%. The nearest neighbour to BOLD:ACG2488, diverging by a minimum of 4.1%, is BOLD:ACO1401 ( P. euxantha ). Based on nuclear data, maximum divergence within the group is 2.5% (based on four specimens and TPI) and the nearest neighbour is 4.7% ( P. nigella , only TPI) or 0.6% different ( P. siskiyouensis , only NaK).

Host plants.

Salix phylicifolia L. ( Vikberg 1966 and later ex ovo rearing experiments by VV). Records from Spiraea ( Verzhutskii 1981) are doubtful, because of possible misidentifications.

Rearing notes.

Ovipositing experiment no. 2/1973: Finland, North Karelia, Joensuu, Purola. One female was captured and offered buds of Salix phylicifolia and young leaves of Betula pubescens . On 18-19.V.1973 several eggs were laid in buds of Salix , the egg pockets were on the undersides of leaves near the leaf margin. Larvae hatched on 22.V.1973. Four larval instars were observed, their development was rapid and on 30.V.1973 some prepupae were seen. No extra moult after feeding.

Distribution and material examined.

West Palaearctic, Nearctic. Specimens studied are from Finland and Sweden.