THE PLIOCENE PROBOSCIDEAN RHYNCHOTHERIUM (MAMMALIA: GOMPHOTHERIIDAE) FROM SOUTH-CENTRAL NEW MEXICO

摘要

A lower jaw of a proboscidean from the Sierra Ladrones Formation of the Santa Fe Group in south-central New Mexico shows diagnostic features of Rhynchotherium and can be tentatively referred to Rhynchotherium falconeri Osborn pending a much needed species-level revision of the genus. This proboscidean is consistent with associated mammals and suggests a late Pliocene (Blancan) age, not younger than 2.2 million years ago.