The conspecificity of several Far Eastern (Russia (FE), Japan) populations is uncertain. The record from Belgium (Baugnée et al., 2000) refers to S. muelleri (Aukema et al., 2007a). The records from Asian Turkey (Kıyak et al., 2007, 2008) are erroneous (Fent et al., 2011). The records from Iran (Sakenin et al., 2011b; Samin et al., 2011) seem erroneous as well.
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