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Re: New Refs.
Indeed, my paper on Ankylosaurus JUST came out. Anyone wanting a pdf of the
article, please email me direct. The file is somewhat large (2.3 megs). I do
not have reprints (couldn't afford them).
>>> Alessandro <email@example.com> 08/16/04 05:22 AM >>>
Dear ListMembers at this time on the "DML" I don't have see these two new
_Carpenter K. 2004 Redescription of Ankylosaurus magniventris Brown 1908
(Ankylosauridae) from the Upper Cretaceous of the Western Interior of North
America. Canadian Journal Earth Sciences Vol.41 n*8 pp:961-986.
ABSTRACT: The armor-plated dinosaur Ankylosaurus magniventris is redescribed
based on specimens from the Hell Creek Formation of northeastern Montana,
USA., Lance Formation of Wyoming, USA., and from the Scollard Formation of
south-central Alberta, Canada. Except for brief descriptions, most of these
specimens have not been described in detail. Ankylosaurus is one of the
largest known ankylosaurids, having an estimated length of up to 6.25 m
(20.5 ft). It is characterized by a long, low skull having very prominent
cranial "horns" that project laterally or dorsolaterally. The body armor
includes a large half-ring that sat across the base of the neck and
shoulders and a large, low tail club.
_Grellet-Tinner G. Chiappe L.M. and Coria R. 2004 Eggs of titanosaurid
sauropods from the Upper Cretaceous of Auca Mahuevo (Argentina). Canadian
Journal Earth Science Vol.41 n*8 pp:949-960.
ABSTRACT: We provide a detailed description of the sauropod eggs from the
Late Cretaceous nesting site of Auca Mahuevo (Neuquén Province, Argentina),
the only eggs that are unequivocally associated with titanosaurid dinosaurs.
These eggs are subspherical averaging 132 by 115 mm. Well-preserved
specimens display a pronounced eggshell ornamentatio that consists mostly
of single nodes averaging 0.58 mm in diameter and 0.28 mm in height (base to
apex) with internodular values of 0.52 to 0.87 mm. The pore canal network
consists of vertical and horizontal canals intersecting at the bases of
eggshell units. Vertical canals may fork defining a "Y" pattern and their
diameters vary between 0.08 and 0.2 mm. Their surficial apertures of 0.15 to
0.29 mm are funnel like and located between the surficial nodes. In pristine
specimens, the eggshell thickness equals 1.31 mm, and radial sections
exhibit a single structural horizontal layer composed of juxtaposed shell
units consisting of acicular calcite crystals radiating from an organic
core. Relying only on taxonomically identified oological material, we regard
this character also shared in the innermost layer (layer 1) of Deinonychus
antirrhopus, oviraptorid theropods, and observed during an early oogenetic
stage in extant bird as primitive for saurischians. The eggshell morphology
advocates that these eggs were likely incubated in moist nesting
environments, perhaps such as nests covered with vegetal matter. Examination
of the South American megaloolithid eggshells reveals that the titanosaurid
eggs from Auca Mahuevo are mostly similar to those described as
Megaloolithus patagonicus and Megaloolithus pseudomamillare.
Via A. grandi n.18
38068 ROVERETO (TN)