Pristiphora albilabris (Boheman, 1852)

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 : 34-36

Pristiphora albilabris (Boheman, 1852) Figs 210, 238

Nematus (Nematus) albilabris Dahlbom, 1835b: 7. Not available. Nomen nudum.

Nematus albilabris Boheman, 1852: 172. Syntype(s) not found in NHRS. Type locality: Wärnaby and Anneberg, Småland, Sweden.

Nematus albilabris Thomson, 1863: 622. Primary homonym of Nematus albilabris Boheman, 1852 [= Pristiphora albilabris (Boheman, 1852)]. Holotype ♀ (NHRS-HEVA000003749) in NHRS, examined. Type locality: Bohuslän, Sweden.

Nematus collaris Stein, 1884: 305-308. 4 ♀ syntypes possibly in BMNH, not examined. Type locality: Chodov, Czech Republic. Synonymised with Lygaeonematus albilabris by Konow (1892).

Similar species.

Species limits in the carinata group are still unclear.

Genetic data.

Based on COI barcode sequences, specimens of the carinata group are divided between four BIN clusters (BOLD:AAF4995, BOLD:ABU8603, BOLD:ACL1744, BOLD:ACL1745), which form a monophyletic group (Fig. 5). Minimal distances between these clusters are 1.2%-4.48%. Because of unresolved taxonomy, it is not yet clear how different species are divided among these BIN clusters. Based on nuclear data, maximum divergence within the group is 2.2% (based on ten specimens and TPI) and the nearest neighbour is 1.5% ( P. pseudocoactula , both genes combined) or 1.0% different ( P. wesmaeli , only NaK).

Host plants.

Betula sp. ( Conde 1934, Benson 1958), B. pubescens Ehrh (ex ovo rearing experiments by VV).

Rearing notes.

Ovipositing experiment no. 16/1972: Finland, North Karelia, Kontiolahti, Venejoki. One captured female laid eggs on 2-3.VI.1972 in pockets on underside of teeth (leaf edges) of young leaves of Betula pubescens . Larvae hatched on 8-9.VI.1972, four larval instars were observed. The final feeding instar lasted about 17 days. Rather small prepupae (male sex?) were seen on 4.VII.1972. No extra moult after feeding.

Distribution and material examined.

Palaearctic. Specimens studied are from Finland and Sweden.