Macronaria

Taxobox | name = Macronarians
fossil_range = Middle Jurassic–Late Cretaceous

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image_width = 250px
image_caption = Several macronarian sauropods
regnum = Animalia
phylum = Chordata
classis = Sauropsida
superordo = Dinosauria
ordo = Saurischia
subordo = Sauropodomorpha
infraordo = Sauropoda
unranked_familia = Macronaria
unranked_familia_authority = Wilson & Sereno, 1998
subdivision_ranks = Clades
subdivision =
Camarasauridae
Titanosauriformes

Macronaria is a clade of sauropod dinosaurs from the Middle Jurassic (Bathonian) to Late Cretaceous Periods of what are now North America, South America, Europe, Asia and Africa. The name means 'large nostrils', in reference to the large nasal openings high on the head that probably supported fleshy resonating chambers. Macronaria consists of two main groups: the family Camarasauridae, and the clade Titanosauriformes. Titanosauriformes in turn contains the brachiosaurids and the titanosaurians and is the one of the largest sauropod groups, which also contains most of the longest, tallest and most massive dinosaurs of all time.

ystematics

*Macronaria
**Family Camarasauridae
***"Aragosaurus"
***"Camarasaurus"
**Titanosauriformes
***?"Cedarosaurus"
***?"Huabeisaurus"
***?"Venenosaurus"
***"Europasaurus"
***"Fusuisaurus"
***Family Brachiosauridae
****"Lusotitan"
****"Brachiosaurus"
****"Sauroposeidon"
***Somphospondyli
****Family Euhelopodidae
*****"Euhelopus"
*****"Erketu"
****Titanosauria

References

* cite journal
author = Upchurch, P.
year = 1998
title = The Phylogenetic relationships of sauropod dinosaurs
journal = Zoological Journal of the Linnean Society of London
volume = 128(1)
pages = 43–103