Calopterygidae Sélys, 1850

Aksenova, Olga V., Potapov, Grigory S., Bespalaya, Yulia V., Kolosova, Yulia S., Vikhrev, Ilya V., Kondakov, Alexander V., Gofarov, Mikhail Yu. & Bolotov, Ivan N., 2020, Dragonflies from hot springs in Russia with a country-level checklist of species known to occur in geothermal environments, Ecologica Montenegrina 34, pp. 49-63 : 53

Family Calopterygidae Sélys, 1850

Mnais costalis Selys, 1869

Fig. 5A, 5B

Material examined. RUSSIA: Kunashir Island, Stolbovsky hot springs, 44.0072°N, 145.6831°E, 29 July 2011, around warm springs and streams, 6♂, Bolotov, Kolosova & Potapov leg.

Field observations. A rather rare species ( Table 2). A few egg-laying females were recorded in a warm stream of the Stolbovsky hot springs.

Distribution. Endemic to Japan ( Okuyama & Takahashi 2017), with a few isolated populations in hot spring sites on the Kunashir Island ( Paulson et al. 1998; Kotlyakov et al. 2009; this study).

Comments. Previously, it was thought to be a subspecies of Mnais pruinosa (Sélys, 1853) but recent molecular study revealed its validity as a separate species ( Hayashi et al. 2004). However, multiple hybridization and mtDNA introgression events were discovered between these species ( Hayashi et al. 2005). In the recent checklist of Russian Odonata ( Malikova & Kosterin 2019) , it is listed as the subspecies Mnais pruinosa costalis .

Figures

Figure 5. Odonata specimens from geothermal habitats of the Kunashir Island [RMBH]. (A) Mnais costalis, male, 29.vii.2011. (B) M. costalis, male, 29.vii.2011. (C) Anotogaster sieboldii, male, 26.vii.2011. (D) A. sieboldii, female, 24.vii.2011. (E) Orthetrum melania, male, 29.vii.2011. (F) O. melania, female, 29.vii.2011. (G) Sympetrum pedemontanum elatum, male, 26.vii.2011. (H) S. pedemontanum elatum, female, 24.vii.2011. Corresponding labels are presented below each specimen. (Photos: Yu. S. Kolosova).