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What is Brachiosauridae?

Pronunciation: BRAK-ee-oh-SOR-uh-day
Author: Riggs
Year: 1904
Etymology: Brachiosaurus + Greek "idae" (family)
Locomotion: Quadrupedal (4 legs)
Synonyms: None known
[Taylor, 2009]Definition
All taxa more closely related to Brachiosaurus altithorax than to Saltasaurus loricatus.
It was first defined in 1998 by Wilson and Sereno as "all titanosauriforms more closely related to Brachiosaurus than to Saltasaurus", and later by Sereno in 2005 online as "the most inclusive clade containing Brachiosaurus brancai but not Saltasaurus loricatus, Euhelopus zdanskyi and Camarasaurus lentus".
However, the PhyloCode dictates that full species names (generic name + specific name) must be used as group specifiers, which rules out Wilson and Sereno's initial definition as it only uses generic names. Plus, the internal specifier of a group (in this case, Brachiosaurus) must be the type species of its genus, which rules out Sereno's later definition because Brachiosaurus brancai was recently renamed Giraffatitan, and it was never the Brachiosaurus type species anyway.
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Etymology
Brachiosauridae is derived from the Greek "brachios" (arm), "sauros" (lizard) and "idae" (family), referring to their very long front legs (arms) and their relationship to Brachiosaurus; the original arm lizard.
Relationships
References
• Riggs ES (1903) "Brachiosaurus altithorax, the largest known dinosaur". American Journal of Science, series 4 15: 299-306.
• Riggs ES (1904) "Structure and relationships of opisthocoelian dinosaurs. Part II, the Brachiosauridae". Field Columbian Museum, Geological Series, 2(6): 229-247.
• Carpenter K and Currie PJ (1992) "Dinosaur Systematics: Approaches and Perspectives".
• Taylor MP (2009) "A re-evaluation of Brachiosaurus Altithorax (Riggs, 1903) and its generic seperation from Giraffititan Brancai (Janensch, 1914)". Journ. Vert. Pal. 29(3): 787–806.
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To cite this page:
Atkinson, L. "DinoChecker FAQ entry :: What is Brachiosauridae?"
http://www.dinochecker.com/dinosaurfaqs/what-is-brachiosauridae›. Web access: 18th Dec 2017.
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