Pristiphora subopaca Lindqvist, 1955

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 : 75-77

Pristiphora subopaca Lindqvist, 1955 Figs 39, 55, 198, 269

Pristiphora subopaca Lindqvist, 1955b: 41-42. Holotype ♀ (http://id.luomus.fi/GL.5202) in MZH, examined. Type locality: Munksnäs, Uusimaa, Finland.

Pristiphora coniceps Lindqvist, 1955b: 39-40. Holotype ♀ (http://id.luomus.fi/GL.5207) in MZH, examined. Type locality: Pihtipudas, Central Finland, Finland.

Pristiphora brunniapex Lindqvist, 1960: 37-38. Holotype ♀ in MZH, examined. Type locality: Pisa, Rovaniemi, Finland.

Similar species.

The most similar species are P. albitibia , P. confusa , P. opaca , P. pusilla , and P. sootryeni . The species is best distinguished through the structure of male penis valve (Fig. 269). Unfortunately, it is rather difficult to separate females of P. subopaca from P. confusa and P. opaca as the differences in the lancets are small (Figs 196-198). Apical serrulae are perhaps less protruding and longer (Fig. 198) than in P. confusa (Fig. 196) and the basal part of the tangium lacks a fold that is present in P. opaca (Fig. 197). Externally, the pterostigma is usually uniformly yellow (Fig. 39) unlike in P. confusa and P. opaca , in which the pterostigma is basally dark brown and apically brown (Fig. 40). In addition, the claws of P. subopaca tend to have a larger subapical tooth (Fig. 23) than in P. opaca (Fig. 22). Among the males, the most similar penis valves are of P. confusa and P. pusilla . The valvispina is bent more strongly and the pseudoceps is broader (Fig. 269) than in P. confusa (Fig. 268). Compared to P. pusilla (Fig. 271), the valvispina is bent less strongly and the dorsal depression in the middle of pseudoceps is less distinct, which is clear only when compared to the left penis valve of P. pusilla .

Genetic data.

Based on COI barcode sequences, P. subopaca belongs to the same BIN cluster (BOLD:AAG3568) as P. aphantoneura , P. bifida , P. confusa , P. opaca , P. pusilla , and P. staudingeri (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 0.3% (based on four specimens and both genes combined) and the nearest neighbour is 0.0% ( P. luteipes , only TPI) or 0.3% different ( P. pusilla , both genes combined). When including TPI introns, the nearest neighbour is 0.1% different ( P. bifida or P. confusa ).

Host plants.

Salix caprea L. ( Lindqvist 1965, Kangas 1985) and S. phylicifolia L. ( Lindqvist 1965).

Distribution and material examined.

West Palaearctic. Specimens studied are from Finland and Sweden.