Baurutitan and Trigonosaurus

[Tim Williams <twilliams_alpha@hotmail.com>]

I haven't seen either papers (though I would dearly love to).   Both genera 
are new titanosaurs from Brazil.  These titanosaurs are coming out of the 
woodwork.

_Baurutitan britoi_

Kellner, A.W.A., Campos, D.A. and Trotta, M.N.F. 92005). Description of a 
titanosaurid caudal series from the Bauru Group, Late Cretaceous of Brazil.  
Arquivos do Museu Nacional 63 (3): 529-564.

Abstract: "A new titanosaurid, _Baurutitan britoi_ n. gen., n. sp., is 
described and compared with other taxa of that sauropod clade. The specimen 
(MCT 1490-R) consists of the last sacral followed by a sequence of 18 caudal 
vertebrae that were found in the continental deposits of the Late Cretaceous 
Bauru Group that outcrop at the Peirópolis region, near the town of Uberaba, 
State of Minas Gerais, Brazil. This new taxon is distinguished from other 
titanosaurians by several features, including subrectangular to square 
outline of the anterior articulation surface of the anterior and middle 
caudals, strongly pointed laterally directed process intercepting the 
spinoprezygapophyseal lamina in caudal 1; dorsal prezygapophyseal tuberosity 
on the lateral margin of the prezygapophyses of caudals 2-4, that smoothens 
out in midcaudals. This material demonstrates that the horizontal ridge 
present in middle and posterior caudals of some titanosaurs, in _Baurutitan 
britoi_ is homologous with a dorsal tuberosity and not with the transverse 
process."


_Trigonosaurus pricei_

Campos, D.A., Kellner, A.W.A., Bertini, R.J. and Santucci, R. M. (2005). On 
a titanosaurid (Dinosauria, Sauropoda) vertebral column from the Bauru 
Group, Late Cretaceous of Brazil. Arquivos do Museu Nacional 63 (3): 
565-593.

Abstract: "A new titanosaurid dinosaur from the Late Cretaceous continental 
deposits of the Bauru Group is described. _Trigonosaurus pricei_ n. gen., n. 
sp., is based on two specimens, both collected at the Caieira Quarry near 
Peirópolis, Minas Gerais. The holotype consists of the five most posterior 
cervical vertebrae, 10 dorsals, six sacrals and the left ilium (MCT 1488-R). 
The second specimen (paratype) consists of 10 caudal vertebrae that 
according to a quarry map, were found isolated but show a similar morphology 
and compatible size suggesting that they belonged to one individual (MCT 
1719-R). _Trigonosaurus pricei_ is diagnosed by a combination of characters 
such as elongated cervicals and middorsals, dorsal vertebrae 9 and 10 with 
incipient postzygodiapophyseal lamina and transverse processes well 
developed throughout the sequence formed by anterior and medial caudals. The 
occurrence of this new taxon indicates a higher diversity of titanosaurids 
in the Brazil during the Cretaceous period."