Pristiphora glauca Benson, 1954

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

Pristiphora glauca Benson, 1954 Figs 126-127, 179, 291

Pachynematus laricivorus Takagi, 1931: 28-32 (Jap.), 8-11(Engl.). Secondary homonym of Nematus laricivorus Brischke, 1883a [= Pristiphora laricis (Hartig, 1837)]. Syntypes possibly in the National Institute of Forest Science (previously Forestry Experiment Station), Seoul, South Korea ( Wong 1975), not examined. Type locality: North Korea. Synonymised with P. glauca by Vikberg (1975).

Pristiphora glauca Benson, 1954a: 113-114. Holotype ♀ in BMNH, not examined. Type locality: Mortimer Forest, Hereford, England, United Kingdom.

Pristiphora takagii Wong, 1975: 459. Replacement name for Pachynematus laricivorus Takagi, 1931.

Similar species.

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

Genetic data.

Based on COI barcode sequences, P. glauca belongs to the same BIN cluster (BOLD:ABY3989) as P. wesmaeli (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 minimum of 3.75%, is BOLD:ACO1401 ( P. euxantha ). Based on nuclear data (one specimen), the nearest neighbour is 0.1% (only NaK) or 0.9% (only TPI) different ( P. wesmaeli ).

Host plants.

Larix decidua Mill. ( Kirkland and Styles 1955, Pschorn-Walcher and Altenhofer 2000), L. kaempferi (Lamb.) Carrière ( Takagi 1931, Kirkland and Styles 1955, Pschorn-Walcher and Altenhofer 2000), L. sibirica Ledeb. ( Verzhutskii 1966), Larix gmelinii (Rupr.) Kuzen. ( Takagi 1931).

Distribution and material examined.

Palaearctic. Specimens studied are from Germany and Russia (Primorsky Krai).