On the nomenclatural status of the morphogenera, Quereuxia and Trapago

Quereuxia Krysht. ex Baikovskaja is the correct name for a morphogenus of leaves and leaf rosettes belonging to an aquatic angiosperm of Late Cretaceous to Palaeocene age in North America and Eurasia and must be accepted instead of its illegitimate junior synonym, Trapago McIver & Basinger. In addition, the name Jonquieria Krassilov, though based on a separate type. falls well within the circumscription of Quereuxia and is here regarded as another later synonym, which requires the new combination Quereuxia vachrameevii (Krassilov) L.J. Hickey.