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Adamantisaurus, new titanosaur in January 2006 Palaeontology



From: Ben Creisler bh480@scn.org

The name Adamantisaurus has appeared on a Brazilian website before
(http://diarioon.com.br/arquivo/3964/cadernos/viver-9914.htm).  In case
this has not been mentioned here yet:

Santucci, R.M. & R. J. Bertini, 2006. A new titanosaur from western Sao
Paolo State, Upper Cretaceous Bauru Group, south-east Brazil. Palaeontology
49(1): 59-66.

Abstract:
Material from a new titanosaurs from the Bauru Basin (Bauru Group), Brazil,
is described and compared with well-known titanosaurs. Adamantisaurus
mezzalirai gen. et sp. nov. is based on six articulated anterior caudal
vertebrae and two haemapophyses collected from the Adamantina Formation,
which is considered to be Campanian-Maastrichtian? in age. Adamantisaurus
mezzalirai is characterized by the following combination of
characteristics: anterior caudal vertebrae with straight or slightly
backwardly-projecting neural spines with strongly expanded distal ends,
stout prespinal lamina, very wide pre- and postzygapophyseal articular
facets, and concave postzygapophyseal articular facets on anterior caudal
vertebrae. Although our cladistic analysis has produced equivocal results,
Adamantisaurus mezzalirai shares with DGM 'Series B' (Periopolis
titanosaur) and Aeolosaurus the presence of postzygapophyses with
concave articular facets, and shares with DGM 'Series B' the presence of
laterally expanded neural spines and stout prespinal lamina. Additionally,
A. mezzalirai shares with DGM 'Series C' (other titanosaur from Peiropolis)
the presence of short neural spines.

Also in the January Palaeontology:
Deeming, D.C., 2006. Ultrastructural and functional morphology of
eggshells supports the idea that dinosaur eggs were incubated buried in a
substrate. Palaeontology 49(1): 171-185.

>From Abstract:
....The ultrastructural characteristics of dinosaur eggshells indicate that
the nesting environment had to be saturated with water vapour and that
dinosaur eggs had to be fully buried in a substrate. In this sense,
therefore, dinosaur eggs resemble more
those of modern reptiles than those of birds. As a consequence, maintenance
of incubation conditions would have depended on the prevailing environment.


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