Pristiphora staudingeri (Ruthe, 1859)

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 : 75

Pristiphora staudingeri (Ruthe, 1859) Figs 202, 272

Nematus Staudingeri [sic!] Ruthe, 1859: 306-307. Lectotype ♀ (designated by Vikberg 1978) in NMW, examined. Type locality: Iceland.

Pristiphora circularis Kincaid, 1900: 350. Holotype ♀ (USNMENT00778165) in USNM, not examined. Type locality: Popof Island, Alaska, USA. Synonymised with P. staudingeri by Smith (1979).

Pristiphora hyperborea Malaise, 1921: 11. Lectotype ♀ (NHRS-HEVA000003650; designated by Vikberg 1978) in NHRS, examined. Type locality: Torne Träsk, Torne Lappmark, Sweden.

Pristiphora asperlatus Benson, 1935: 35-38. Holotype ♀ in BMNH, not examined. Type locality: Mount Braeriach, Inverness, Scotland, United Kingdom. Synonymised with P. staudingeri by Lindqvist (1953).

Similar species.

The most similar species is P. luteipes , which can sometimes be difficult to distinguish from P. staudingeri : occasional specimens from arctic habitats have intermediate coloration of metafemur (between completely black and completely pale, e.g. specimen DEI-GISHym80238 has a nearly completely pale metafemur). See Vikberg (2006) and Prous et al. (2016) for more detailed discussion.

Genetic data.

Based on COI barcode sequences, P. staudingeri belongs to the same BIN cluster (BOLD:AAG3568) as P. aphantoneura , P. bifida , P. confusa , P. opaca , P. pusilla , and P. subopaca (Fig. 4). Maximum distance within the BIN is 3.33% and minimum between species distance is 0.00%. The nearest neighbour to BOLD:AAG3568, diverging by a minimum of 2.76%, is BOLD:AAQ2302 ( P. armata and P. leucopus ). Based on nuclear data, maximum within species divergence is 0.7% (based on four specimens and TPI or both genes combined) and the nearest neighbour is 0.1% different ( P. bifida , P. confusa , P. luteipes , or P. subopaca , only TPI).

Host plants.

Salix herbacea L. and S. phylicifolia L. ( Vikberg 1978).

Rearing notes.

Ovipositing experiment no. 11/1974 as P. hyperborea : Finland, Enontekiö Lapland, Saana. On 21-22.VI.1974 one captured female laid 11 eggs into leaf-edge teeth of Salix phylicifolia . No eggs were laid on Salix reticulata , Betula pubescens var. pumila , Astragalus alpinus and A. frigidus . Larvae hatched on 25-26.VI.1974. They feed on the leaf margin. Four larval instars were observed. Their development was rapid and on 6.VII.1974 prepupae were found. No extra moult after feeding.

Distribution and material examined.

West Palaearctic, Nearctic. Specimens studied are from Finland, France, Iceland, Norway, Sweden, Switzerland, and United Kingdom.