This section contains a list of genera for which the bibliography does not provide a clear systematic position.

The systematic position of the Silktail has been a long-standing mystery.

The systematic position of this species has recently changed.

Ultimately he demurred from assigning a systematic position to his family.

They concluded that the systematic position of Limnanthaceae is uncertain and cannot be presently determined.

New light on the skull anatomy and systematic position of Oviraptor.

The systematic position of the genus is unclear; it might have been an enantiornithine bird.

"On the systematic position of the Nardoo plant and the physiological characteristics of its fruit".

This genus is not well known and its systematic position has long been uncertain.

The systematic position of Platycarpha has long been regarded with uncertainty.