Couple of new papers

[Mark Van Tomme <markvantomme@yahoo.com>]

Montague J.R. (2006) ESTIMATES OF BODY SIZE AND
GEOLOGICAL TIME OF ORIGIN FOR 612 DINOSAUR GENERA
(SAURISCHIA, ORNITHISCHIA),Florida Scientist: Vol. 69,
No. 4, pp. 243â??257.

Using internet databases, estimates of body length
(m), body weight (kg), and geological time of first
appearance in millions of years before present (MYBP)
were recorded for 612 valid genera of dinosaurs.
Analyses of the data suggest that two major internet
databases (DinoData and Dinosauier-Web [in German])
are in close agreement in their classifications and
estimates of typical body length (m) per genus. The
length and weight estimates were used to calculate
body mass index (BMI = kg/m2) estimates for each
genus. The bipedal meat-eaters of Suborder Theropoda
(Order Saurischia) showed the relatively lowest values
for median BMI, while the quadrupedal plant-eaters of
Suborder Sauropodomorpha (Order Saurischia) showed the
relatively highest values for median BMI. The mixture
of bipedal and quadrupedal plant eaters within Order
Ornithischia showed median BMI values generally
similar to the threopod genera. Although many genera
of theropods, sauropodomorphs and ornithischians
appeared during the Late Triassic and Jurassic Periods
(225â??144 MYBP), most genera of theropods and
ornthischians appeared later in the Mesozoic, during
the Cretaceous Period (144â??65 MYBP). The median BMI
values of theropod and ornithischian genera were not
correlated with time of first appearance, but for the
sauropodomorphs, the higher BMI values (and more
robust body proportions) appeared later in
evolutionary time.


Osi, A., Clark, J. M., and Weishampel, D. B., 2007,
First report on a new basal eusuchian crocodyliform
with multicuspid teeth from the Upper Cretaceous
(Santonian) of Hungary: Neues Jahrbuch für Geologie
und Paläontologie, Abhandlungen, v. 243, n. 2, p.
169-177. 

The scanned pages of this paper were uploaded here:

http://www.4shared.com/file/14717111/bb73eca9/Osi.html


Mark Van Tomme







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