Temporal range: Late Paleocene
Scientific classification Red Pencil Icon
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Clade: Aequorlitornithes
Clade: Ardeae
Clade: Aequornithes
Clade: Austrodyptornithes
Family: Spheniscidae
Genus: Crossvallia
Tambussi, 2005

Crossvallia unienwillia (type)

Crossvallia is an extinct genus of penguins which contains a single species, whose remains have been recovered from Late Paleocene deposits on Seymour Island, Antarctica. It was larger than any living penguin.[1]


  1. ^ Tambussi, Claudia P.; Reguero, Marcelo A.; Marenssi, Sergio A.; Santillana, Sergio N. (2005). "Crossvallia unienwillia, a new Spheniscidae (Sphenisciformes, Aves) from the Late Paleocene of Antarctica". Geobios. 38 (5): 667–75. 
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