Related taxa: ----- * Anser brachyrhynchus Anser [fabalis, serrirostris or brachyrhynchus] ----- Anser [fabalis or serrirostris] ---------- * Anser fabalis --------------- Anser fabalis fabalis --------------- Anser fabalis [middendorffii or johanseni] -------------------- Anser fabalis middendorffii ------------------------- Anser fabalis middendorffii (middendorffii) ------------------------- [ Anser fabalis middendorffii (sibiricus) ] -------------------- Anser fabalis johanseni ---------- * Anser serrirostris --------------- Anser serrirostris serrirostris -------------------- Anser serrirostris serrirostris (serrirostris) -------------------- [ Anser serrirostris serrirostris (curtus) ] --------------- Anser serrirostris rossicus

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