Fenusa ewaldi D. R. Smith, 2011 (Tenthredinidae, Blennocampinae)

Liston, Andrew, Mutanen, Marko, Heidemaa, Mikk, Blank, Stephan M., Kiljunen, Niina, Taeger, Andreas, Viitasaari, Matti, Vikberg, Veli, Wutke, Saskia & Prous, Marko, 2022, Taxonomy and nomenclature of some Fennoscandian Sawflies, with descriptions of two new species (Hymenoptera, Symphyta), Deutsche Entomologische Zeitschrift 69 (2), pp. 151-218 : 151

Fenusa ewaldi D. R. Smith, 2011 (Tenthredinidae, Blennocampinae)

Figs 36 , 37

Notes.

A total of about 40♀ and numerous mines. All specimens leg. M. Mutanen, in ZMUO and SDEI:

Finland: Ostrobottnia ouluensis, Oulu Linnanmaa kasvipuutarha [Oulu Botanic Garden], YKJ grid coordinates: 7219:3427 [65.064N, 25.460E]: adults, 26.06.2018. Larvae in mines on Rosa , 12.07.2019, Rearing 142/2019. Larvae in mines on Rosa , 07.08.2019, Rearing 376/2019. Adults, 06.06.2020. Larvae in mines on Rosa , 06.07.2020, Rearing: 30/2020.

Ostrobottnia kajanensis, Kuhmo Ulvinsalo, YKJ grid coordinates: 7103:3665 [63.992°N, 30.382°E]: about 20 mines on Rubus chamaemorus , of which ca 8 inhabited, with one larva in alcohol and four females emerged, collected 10.08.2019, Rearing: 400/2019.

Fenusa ewaldi was described from two females reared from leaf-mines on Rosa collected in Novosibirsk, West Siberia ( Smith and Altenhofer 2011). Also reared from Rosa by Ponomarev (2022): Russia, Moscow oblast, Voynovo-Gora, 55.846°N, 39.063°E, 10.07.2020. Since at least 2018, leaf-mines of Fenusa ewaldi have been frequently found on Rosa , e.g. R. woodsii and R. acicularis in Oulu Botanic Garden, and numerous females reared (Fig. 36 ). At these three localities, cultivated Rosa species in parks and gardens were the hosts (Fig. 37A ). Mines were found mostly on more sheltered rose bushes. The rearing of four females from leaf-mines on Rubus chamaemorus (above) was therefore unexpected, considering the habitat was shady, moist, natural old-growth mixed forest dominated by spruce (Fig. 37B ).

Figures

Figure 36. Fenusa ewaldi D. R. Smith, 2011. ♀ (ZMUO. 045185).

Figure 37. Fenusa ewaldi D. R. Smith, 2011. A. Leaf-mine in Rosa sp.; B. Leaf-mine in Rubus chamaemorus.