Siphlonurus aestivalis Eaton, 1903

Martynov, Alexander V., 2018, New records of some rare mayflies (Insecta, Ephemeroptera) from Ukraine, Ecologica Montenegrina 16, pp. 48-57 : 54

Siphlonurus aestivalis Eaton, 1903

This species is rare in Ukraine. Previously it was known only from one point in Chernivtsi Region at the vicinity of Berehomet settlement (Martynov 2013). We registered S. aestivalis in two localities at the Desna River within Chernihiv Region ( Figs 14, 17 ).

Habitat: In Chernivtsi Region larvae were collected at limnocrene (shallow draw-well). In contrast, in Chernihiv Region larvae of the species were collected in small well-warmed bay and the standing area along the bank of the Desna River. These microhabitats were located within the potamal zone of the river and characterized by the silted bottom densely overgrown with Agrostis stolonifera Linnaeus, 1753 (Poaceae) ( Fig. 17 ). Population density of S. aestivalis in grass thickets at the bay of the Desna River was 117 specimens /m 2. Additional parameters of waterbody in sampling places were: water temperature 18°C, water hardness 160–181 ppm, pH 8.7–9.0.

Material: Ukraine, Chernihiv Region: 232 larvae, vicinity of Prydesnyans’ke village, bay of Desna River , 51.613417, 33.007583, h – 118 m a.s.l., Martynov A. V. leg., 1.05.2017 – IN Chg 11 Siphae /1–7 ; 29 larvae, vicinity of Sverdlovka village, Desna River , 51.772583, 33.070317, h ~ 125 m a.s.l., Martynov A. V. leg., 1.05.2017 – IN Chg 12 Siphae .

Figures

Figures 14–18. New collection sites of the investigated species within Ukraine: 14. – map showing new sites (red circles – Palingenia fuliginosa (Georgi, 1802); yellow circles – Isonychia ignota (Walker, 1853); green circle – Baetopus tenellus (Albarda, 1878); blue circles – Brachycercus harrisella Curtis, 1834; red quadrates – Siphlonurus aestivalis Eaton, 1903; yellow quadrate – Metreletus balcanicus (Ulmer, 1920)); 15. – Styr River, (vicinity of Stara Rafalivka village, July 2017); 16. – Stvyga River (vicinity of Poznan’ village, July 2017); 17. – bay of Desna River (vicinity of Prydesnyans’ke village, May 2017); 18. – Salva River (territory of Bukove village, May 2017).