Selaginella and Desfontainia, are what kind of item?
Desfontainia Desfontainia is a genus of flowering plants placed currently in the family Columelliaceae, though formerly in Loganiaceae, Potaliaceae (now subsumed in Gentianaceae), or a family of its own, Desfontainiaceae.
Desmostylia The Desmostylia (from Greek δεσμά "desma", "bundle", and στῦλος "stylos", "pillar") are an extinct order of aquatic mammals that existed from the late Oligocene (Arikareean) to the late Miocene (Tortonian) ().