Chronoperates

Chronoperates Temporal range: Late Paleocene, 55 Ma PreЄ Є O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Class:	Mammalia
Clade:	Holotheria
Family:	†Chronoperatidae Fox, Youzwyshyn & Krause, 1992
Genus:	†Chronoperates Fox, Youzwyshyn & Krause, 1992
Type species
†Chronoperates paradoxus Fox, Youzwyshyn & Krause, 1992

Chronoperates (meaning "time wanderer" in Greek) is an extinct genus of probable mammal whose remains have been found in a late Paleocene deposit in Alberta, Canada. It is represented by the type species Chronoperates paradoxus and known only from a partial left lower jaw. It was first identified in 1992 as a non-mammalian cynodont, implying a ghost lineage of over 100 million years since the previously youngest known record of non-mammalian cynodonts, which at that time was in the Jurassic period (some non-mammalian cynodonts are now known to have persisted until the Early Cretaceous). More recently, Chronoperates has been interpreted as a late-surviving symmetrodont mammal.

References

http://darrennaish.blogspot.com/2006/05/time-wandering-cynodonts-and-docodonts.html

http://www.palaeos.com/Vertebrates/Units/410Cynodontia/410.400.html