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Re: Decuriasuchus, new "gregarious" rauisuchian from Brazil
Wow, if these hunted in packs, no sympatric tetrapod in the Triassic was safe.
2011/4/1 firstname.lastname@example.org <email@example.com>:
> From: Ben Creisler
> I hesitate to post any serious story links today, but this one IS legit.
> Marco Aurélio G. Franca, Jorge Ferigolo and Max C. Langer (2011)
> Associated skeletons of a new middle Triassic “Rauisuchia” from Brazil.
> Naturwissenschaften (advance online publication)
> DOI: 10.1007/s00114-011-0782-3
> For more than 30 million years, in early Mesozoic Pangea, “rauisuchian”
> archosaurs were the apex predators in most terrestrial ecosystems, but
> their biology and evolutionary history remain poorly understood. We
> describe a new “rauisuchian” based on ten individuals found in a single
> locality from the Middle Triassic (Ladinian) Santa Maria Formation of
> southern Brazil. Nine articulated and associated skeletons were discovered,
> three of which have nearly complete skulls. Along with sedimentological and
> taphonomic data, this suggests that those highly successful predators
> exhibited some kind of intraspecific interaction. Other monotaxic
> assemblages of Triassic archosaurs are Late Triassic (Norian-Rhaetian) in
> age, approximately 10 million years younger than the material described
> here. Indeed, the studied assemblage may represent the earliest evidence of
> gregariousness among archosaurs, adding to our knowledge on the origin of a
> behavior pattern typical of extant taxa.
> The name "Decuria" comes from the Roman term for a body of 10 soldiers.
> There are number of news stories in Portuguese about the find, some with a
> mail2web - Check your email from the web at