Navaornis

Navaornis yana da kwanyar da ba ta da haƙora tare da manyan idanu, kamar tsuntsaye da yawa a yau, amma kwakwalwarsa har yanzu tana da wasu tsoffin halaye kamar ƙaramin cerebellum da telencephalon da ba a faɗaɗa sosai ba.1

Kwanyarsa ita ce kwanyar tsuntsu ta zamanin Mesozoic da aka fi adanawa da kyau da aka taɓa samu, wadda aka adana a cikin girma uku ba tare da an matse ta ba.1

Navaornis ya rayu ne tsakanin shekaru miliyan 85 zuwa 75 da suka wuce, a lokacin ƙarshen zamanin Cretaceous.12

Wurin burbushin da aka gano Navaornis yana da ƙanƙanta sosai, kusan murabba'in mita 6 ne kawai, amma ya ba da ɗaruruwan ƙasusuwan tsuntsayen enantiornithine.1

Navaornis yana cikin wani rukuni da ake kira Enantiornithes, waɗanda su ne tsuntsayen da suka fi kowane iri yawa a zamanin Mesozoic kuma suka rayu a kowace nahiya banda Antarctica.12

Kunnuwansa na ciki (bony labyrinth) suna da siffa irin ta tsuntsayen zamani da yawa, amma sun fi su girma sosai.1