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The New Paper at the End of the Universe (Was: Hitchhiker's New Papers to the Galaxy)



Jerry D. Harris writes:
 > Hi All -
 > 
 > Before we get to the juicy stuff, here's some new things:
 > [snip]

But, Jerry, you missed the highlight: a new, and well-represented
brachiosaurid!
        
        Rose, Peter J.  2007.  A new titanosauriform sauropod
        (Dinosauria: Saurischia) from the Early Cretaceous of central
        Texas and its phylogenetic relationships.  Palaeontologia
        Electronica 10 (2): 8A.
        http://palaeo-electronica.org/2007_2/00063/

ABSTRACT

A collection of primitive titanosauriform sauropods from the Jones
Ranch locality, Early Cretaceous Twin Mountains Formation (~112 Ma),
central Texas, represents one of the richest accumulations of sauropod
bones in North America. Autapomorphic characters of the taxon include
cranial and mid-caudal neural arches with distinct
intraprezygapophyseal laminae (tprl), accessory vertebral laminae on
cranial dorsal neural arches, and dorsal neural spines that lack a
postspinal lamina.

Non-vertebral skeletal elements referred to the genus Pleurocoelus
from the Arundel Formation of Maryland and Virginia possess some
diagnostic morphological characteristics and can be compared with the
Jones Ranch sauropod. The latter differs from Pleurocoelus in the
shape of the caudoventral margin of the maxilla, the shape of the
distal scapular blade, and the shape of the proximal condyle of the
tibia. The Jones Ranch sauropod is also morphologically distinct from
all other sauropods described and named from the Early Cretaceous of
North America.

Cladistic analysis places this sauropod within Titanosauriformes. The
Texas sauropod does not possess synapomorphies of Somphospondyli, and
derived characters that have been used to define the Titanosauria are
also absent, affirming its placement as a basal titanosauriform. The
new taxon from Texas is known from more material than any other North
American Early Cretaceous sauropod. Description of the taxon increases
the diversity of sauropods in North America during the Early
Cretaceous and provides more complete, associated material that can be
compared to new discoveries from this time period.

 _/|_    ___________________________________________________________________
/o ) \/  Mike Taylor    <mike@indexdata.com>    http://www.miketaylor.org.uk
)_v__/\  Archosaurs rule!