Czerkas ' Cryptovolans was treated as Microraptor , and his Scansoriopteryx was treated as Epidendrosaurus .
Two other taxa that Czerkas and his co-authors named were later treated as junior synonyms by other authors .
Czerkas ' Cryptovolans was treated as Microraptor , and Czerkas ' Scansoriopteryx was treated as Epidendrosaurus .
Two other taxa that Czerkas and his co-authors named were later treated as junior synonyms by other authors .