Assertion: raven's form | /r/HasProperty | psilopterus
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Source sentences:
text: However, reports from Uruguay of new findings of a relatively small form (Psilopterus) dating to 18,000 and 96,000 years ago would imply that phorusrhacids survived there until very recently (i.e., until the late Pleistocene); the initial report of such a recent date has been questioned.