Exacerbating these issues, columbids are not well represented in the fossil record. No truly primitive forms have been found to date. The genus "Gerandia" has been described from Early Miocene deposits in France, but while it was long believed to be a pigeon, it is now considered a sandgrouse. Fragmentary remains of a probably "ptilinopine" Early Miocene pigeon were found in the Bannockburn Formation of New Zealand and described as "Rupephaps"; ""Columbina" prattae" from roughly contemporary deposits of Florida is nowadays tentatively separated in "Arenicolumba", but its distinction from "Columbina/Scardafella" and related genera needs to be more firmly established (e.g. by cladistic analysis). Apart from that, all other fossils belong to extant genera.