Gerris sahlbergi Distant, 1879: 125 (downgraded to ssp. of costae by Damgaard, 2006: 14). LT (Kanyukova, 1982a: 84): female, Kashmir; BMNH.
Gerris costai mongoliensis Lansbury, 1966a: 211 (syn. Kanyukova, 1982: 82). HT: male, Mongolia; ZMHB.
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