 The Armenoceratidae have their beginning in "Armenoceras" which first appeared near the beginning of the Chazyan, 2nd stage of the Middle Ordovician in older established chronologies, in northeastern China, Manchuria, derived from "Wutinoceras".Additional genera include "Nybyoceras" and "Selkirkoceras", respectively, from the upper Middle and Upper Ordovician, and "Monocyrtoceras", "Elrodoceras", and "Megadiscoceras" from the Silurian,

The Armenoceratidae, "Armenoceras", "Nybyoceras", and "Selkirkoceras", first appear in North America in the diverse cephalopod Redriveran faunas of the early Upper Ordovician but are no longer found during that stage in Asia.