Pristiphora testacea (Jurine, 1807)

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 : 95-97

Pristiphora testacea (Jurine, 1807) Figs 7, 50, 59, 147-148, 261

Tenthredo Betulae [sic!] Retzius, 1783: 72-73, by indication to Degeer (1771: 994, Pl. 37. Fig. 23). Primary homonym of Tenthredo betulae Linné, 1758 [= Pamphilius betulae ( Linné, 1758)]. Syntype(s) possibly in NHRS. Type locality: possibly Lövstabruk, Uppland, Sweden (place of residence of Degeer; see Taeger and Blank 1998).

Tenthredo betulae Christ, 1791: 453, by indication to Degeer (1771: 994, Pl. 37. Fig. 23). Primary homonym of Tenthredo betulae Linné, 1758 [= Pamphilius betulae ( Linné, 1758)]. Syntype(s) possibly in NHRS. Type locality: possibly Lövstabruk, Uppland, Sweden (place of residence of Degeer; see Taeger and Blank 1998).

Pteronus testaceus Jurine, 1807: pl. 13 fig. 8. Syntype(s) probably lost ( Zinovjev and Vikberg 2006). Type locality: not stated.

Nematus (Nematus) betulinus Dahlbom, 1835b: 8. Note. Replacement name for "(an. Tenthr. Betulae De Geer)". Syntype(s) possibly in NHRS. Type locality: possibly Lövstabruk, Uppland, Sweden (place of residence of Degeer; see Taeger and Blank 1998).

Nematus betularius Hartig, 1837: 192-193. Holotype ♀ (GBIF-GISHym4688) in NFVG, examined. Type locality: Harz, Germany.

Nematus betulae Hartig, 1837: 219-220, by indication to Degeer (1771: 994, Pl. 37. Fig. 23). Syntype(s) possibly in NHRS. Type locality: possibly Lövstabruk, Uppland, Sweden (place of residence of Degeer; see Taeger and Blank 1998).

Nematus melanurus Hartig, 1840: 24. Syntype ♀ (GBIF-GISHym3347) in ZSM, not examined. Type locality: not stated. Synonymised with Nematus betulae by Kriechbaumer (1885).

Nematus erythrogaster Thomson, 1871: 103-104. Primary homonym of Nematus erythrogaster Norton, 1864. Syntype(s) ♀ in MZLU, not examined. Type locality: Torekov, Skåne and North-Western Skåne, Sweden. Synonymised as P. erythrogastra with P. betulae by Konow (1890).

Nematus crassiventris Cameron, 1878c: 267. Replacement name for Nematus erythrogaster Thomson, 1871.

Nematus hartigii W.F. Kirby, 1882: 127. Replacement name for Nematus betulae Hartig, 1837.

Nematus luteogaster W.F. Kirby, 1882: 132. Replacement name for Nematus erythrogaster Thomson, 1871.

Pristiphora gaunitzi Lindqvist, 1968b: 196, syn. n. Holotype ♀ (NHRS-HEVA000003644) in NHRS, examined. Type locality: Vännäs, Sorsele Lycksele Lappmark, Sweden.

Similar species.

The most similar are pale specimens (with completely yellow abdomen) of P. pallidiventris and P. conjugata . Pristiphora pallidiventris is best distinguished from P. testacea by having valvula 3 with long medial projection (short in P. testacea ) and short postocellar area (1.0-1.5 times longer than diameter of lateral ocellus, about 2.0 times in P. testacea ). The bicoloured pterostigma (Fig. 43) of P. conjugata is useful for distinguishing this species from P. testacea .

We treat gaunitzi Lindqvist as a rare colour form (abdomen dorsally black) of testacea . We have seen one additional female with this coloration, from Pallastunturi in Finnish Lapland, that was reared from Betula , the host plant of testacea . The penis valve of what Lindqvist (1972) thought to be gaunitzi , is not distinguishable from testacea (Fig. 261).

Genetic data.

Based on COI barcode sequences, P. testacea forms its own BIN cluster (BOLD:AAX8158) (Fig. 5). Maximum distance within the BIN is 0%. The nearest neighbour to BOLD:AAX8158, diverging by minimum of 6.17%, is BOLD:AAX8150 ( P. pallida ). Based on nuclear data, maximum within species divergence is 0.0% (based on three specimens and TPI or NaK) and the nearest neighbour is 1.0% ( P. cadma , both genes combined) or 0.9% ( P. parva , only NaK) different.

Host plants.

Betula humilis Schrank, B. pendula Roth, and B. pubescens Ehrh. ( Adam 1973).

Distribution and material examined.

Palaearctic. Specimens studied are from Estonia, Finland, France, Germany, and Sweden.