Seeley thought the bones came from a primitive bird, and gave it a name meaning "bird link", from Greek ὄρνις (ornis), "bird", en δεσμός (desmos), "link".
Seeley believed the bones originated from a primitive bird, and coined a name meaning "bird connection", derived from Greek ὄρνις (ornis), "bird", and en δεσμός (desmos), "link".