Dicraeosauridae

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Dicraeosauridae
Temporal range: Late Jurassic - Early Cretaceous
Dino amargasaurus.jpg
Amargasaurus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Superorder: Dinosauria
Suborder: Sauropodomorpha
Superfamily: Diplodocoidea
Family: Dicraeosauridae
Janensch, 1929
Genera

Dicraeosauridae is a family of sauropod dinosaurs known from the Late Jurassic and Early Cretaceous of Africa and South America. Currently only three genera are recognised; the Jurassic South American genus Brachytrachelopan, the Jurassic African Dicraeosaurus and the South American Early Cretaceous Amargasaurus, with its distinctive neck spines. All three animals are small by sauropod standards, with relatively short necks.

Dicreosaurids drawn to scale.

McIntosh (1990) includes a number of genera within the subfamily Dicraeasaurinae of the family Diplodocidae, but many of these are now recognised as belonging to distinct families (Nemegtosauridae and Rebbachisauridae).

The group is described cladistically as a stem-based taxon defined as "The most inclusive clade containing Dicraeosaurus hansemanni Janensch 1914 but not Diplodocus longus Marsh 1878" or as "all diplodocoids more closely related to Dicraeosaurus hansemanni than to Diplodocus longus (Sereno 1998 p.63, Upchurch et al. 2004 p.304, Wilson 2005 p.35)

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