. "Mastrus ridibundus" . "Mastrus ridibundus" . . . _:b75519084 . "230865" . _:b75519084 "Fauna Europaea id" . . _:b75892785 . _:b75892785 "GBIF id" . _:b75892785 . . . . "Mastrus ridibundus (Gravenhorst, 1829)" . "Mastrus ridibundus" . _:b75892785 . _:b75519084 . _:b75519084 "urn:lsid:faunaeur.org:taxname:334483" . "urn:lsid:faunaeur.org:taxname:334483" . _:b75892785 "1287797" . "1287797" . . _:b75519084 . . . "(Gravenhorst, 1829)" .