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Re: Dinosaur environments
Other fruit - like structures that dinosaurs may have eaten are the arils of
podocarps.
Here is a fossil one from the Early Cretaceous of Patagonia. It most closely
resembles the extant Microcachrys:
Review of Palaeobotany and Palynology
Volume 59, Issues 1-4, Pages 1-369 (21 June 1989)
Squamastrobus gen. N., A fertile podocarp from the early cretaceous of
Patagonia, Argentina
Pages 109-126
Sergio Archangelsky, Georgina del Fueyo
Squamastrobus tigrensis nov. gen. et sp. has been found in early
Cretaceous strata (BaquerÛ Formation), Santa Cruz Province, Argentina. It
is based on branches with squamiform leaves, laterally attached pollen
cones and terminally disposed seed cones. The cuticle of leaves and female
bract-scale complexes was studied in their general structure and
ultrastructure. The pollen cones contain bisaccate pollen grains that are
similar both structurally and ultrastructurally with extant and fossil
members of the Podocarpaceae. The seed cones are compact structures
resembling some taxa found in Mesozoic Gondwana strata. Comparisons made
with living and extinct members of the Podocarpaceae suggest some
phylogenetic links between Mesozoic cone-bearing forms with the extant
genera Microcachrys and Pherosphaera. Finally, some considerations on the
origin of Mesozoic podocarps are also included in regard to recently
discovered Permian conifers from Gondwana.
----- Original Message ----
From: Scott Hartman <skeletaldrawing@gmail.com>
To: rmtakata@gmail.com
Cc: ddkrentz@charter.net; Dino List <dinosaur@usc.edu>
Sent: Sun, August 1, 2010 1:36:37 AM
Subject: Re: Dinosaur environments
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