Pristiphora wesmaeli (Tischbein, 1853)

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 : 44-45

Pristiphora wesmaeli (Tischbein, 1853) Figs 180, 292

Nematus Wesmaeli [sic!] Tischbein, 1853: 347-348. 34 ♀♀ and 32 ♂♂ syntypes probably destroyed ( Horn et al. 1990). Type locality: Herrstein, Rhineland-Palatinate, Germany.

Nematus solea Snellen van Vollenhoven, 1870: 59-60. Holotype ♂ in ZMAN ( Thomas 1987), not examined. Type locality: not stated. Synonymised with Lygaeonematus wesmaeli by Konow (1904a).

Similar species.

The most similar species is P. glauca . The differences in adults are small and might not always be clear. According to Benson (1958), the ovipositor is about 0.9 times as long as the protibia in P. wesmaeli (1.1 times in P. glauca ). For males, the differences in penis valves are also very slight (see the Key). The differences in larval coloration, later emergence of adults, and later larval feeding period distinguish P. wesmaeli from P. glauca more reliably (Benson, 1954a).

Genetic data.

Based on COI barcode sequences, P. wesmaeli belongs to the same BIN cluster (BOLD:ABY3989) as P. glauca (Fig. 5). Maximum distance within the BIN is 2.17% and minimum between species distance is possibly 0.00%. The nearest neighbour to BOLD:ABY3989, diverging by a minimum of 3.75%, is BOLD:ACO1401 ( P. euxantha ). Based on nuclear data (two specimens), the nearest neighbour is 0.1% (only NaK) or 0.9% (only TPI) different ( P. glauca ).

Host plants.

Larix decidua Mill., Larix gmelinii (Rupr.) Rupr., L. kaempferi (Lamb.) Carrière, Larix x eurolepis Henry ( Huflejt and Sawoniewicz 1999), and L. sibirica Ledeb. ( Kangas 1985).

Distribution and material examined.

Palaearctic. One male specimen studied from France. The second specimen mentioned under Genetic data is from a larva (voucher 3c, Belgium, collected on 7.VIII.2000) that we have not studied.