Anatidae

Iwaniuk, Andrew N., Olson, Storrs L. & James, Helen F., 2009, Extraordinary cranial specialization in a new genus of extinct duck (Aves: Anseriformes) from Kauai, Hawaiian Islands, Zootaxa 2296, pp. 47-67 : 48

Family Anatidae

The new taxon is assigned to the Anatidae based on the following combination of traits: neurocranium with strongly developed postorbital processes, but lacking zygomatic processes or any ossification of the aponeuroses zygomatica; large basipterygoid processes present on the parasphenoid rostrum anterior to the basitemporal plate; ossified cartilage present in the caudal nasal concha; lacrimals fused and elongated anteroposteriorly; mandible with strongly upturned retroarticular processes.