Both Anisacanthus and Holodiscus are what level of classification?
Anisacanthus Anisacanthus is a genus of flowering plants in the bear's breeches family, Acanthaceae. The generic name is derived from the Greek words ανισος ("anisos"), meaning "unequal," and ακανθος ("acanthos"), meaning "thorn." Members of the genus are native to tropical and subtropical regions of the Americas. They are commonly known as desert honeysuckles, though this term is shared with the genus "Ancistranthus", and is something of a misnomer as true honeysuckles (genus "Lonicera") belong to the family Caprifoliaceae. "Anisacanthus" species are sometimes cultivated for use in xeriscaping.
Orthacanthus Orthacanthus is an extinct genus of fresh-water shark from a family of prehistoric sharks known as xenacanths. Members of the genus had a long spine growing from the back of their skull and a very long dorsal fin, which ran all along its back giving it an eel-like appearance.