Alexandrinia
Alexandrinia is an extinct genus of stem-group mayflies which existed in what is now Russia and the United States during the Permian period. It was described by N. D. Sinitshenkova and D. V. Vassilenko in 2012, and contains four species: A. gigantea, A. directa, A. ipsa and A. vitta. The genus is named in honor of Russian entomologist Alexandr Rasnitsyn.