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Re: Cretaceous Wars - The Revenge of the Rat...uh...I mean Mammal
Does anyone know what the full citation will be once this paper gets into print?
I didn't see it on the Palaeontology web site. Its frustrating when they do
this. It seems silly at this stage in the editorial process to expect us to
use "In Press".
---------- Original Message ----------
From: Jocelyn Falconnet <email@example.com>
To: Dinosaur Mailing List <firstname.lastname@example.org>
Subject: Cretaceous Wars - The Revenge of the Rat...uh...I mean Mammal
Date: Wed, 23 Jun 2010 10:24:58 +0200
As time goes by, the role of mammals in Cretaceous ecosystems becomes
more complex than previously thought. The "small nocturnal insectivorous
mammal" dogma has been indeed questioned in the last decade following
the discovery of new well preserved forms, such as the dog-sized
triconodont *Repenomamus* of which the diet included juvenile dinosaurs
or the very small (~6 gs !) fossorial *Fruitafossor*.
The taphonomic studies of Nicholas Longrich and Michael Ryan on on
dinosaur, *Champsosaurus*, and *Eodelphis* bones from the Late
Cretaceous of Alberta brings new evidence for complex - here gnawing -
behaviour in Cretaceous mammals - including probably multituberculates.
There are so many papers on Neogene taphonomy and comparatively too few
on older material, although taphonomy deals with behaviour, ecology,
diet preferences, and so many things of which we know little for extinct
taxa - even non-avian dinosaurs which are not the least studied of
Anyway, here is the paper (in press):
Longrich N.R. & Ryan M.J. In press. Mammalian tooth marks on the bones
of dinosaurs and other Late Cretaceous vertebrates. Palaeontology.
We describe bones from the Late Cretaceous of Alberta – including bones
of large dinosaurs, a femur from the aquatic reptile Champsosaurus, and
a dentary from the marsupial Eodelphis– that bear tooth marks made by
animals with opposing pairs of teeth. Of the animals known from the Late
Cretaceous of North America, only mammals are capable of making such
tooth marks. In particular, multituberculates, which have paired upper
and lower incisors, are the most likely candidates for the makers of
these traces. The traces described here represent the oldest known
mammalian tooth marks. Although it is possible that some of these tooth
marks represent feeding traces, the tooth marks often penetrate deep
into the dense cortices of the bone. This raises the possibility that,
much as extant mammals gnaw bone and antler, some Cretaceous mammals may
have consumed the bones of dinosaurs and other vertebrates as a source
of minerals. However, none of the tooth marks described here resemble
the extensive gnaw traces produced by Cenozoic multituberculates or
rodents. This suggests that specialized gnawing forms may have been rare
or absent in the Late Cretaceous of North America.
PhD student -> The early radiation of amniotes
Supervisors -> J-C Rage and J-S Steyer (MNHN)
CR2P, UMR 7207, CNRS
Département Histoire de la Terre
Muséum national d'Histoire naturelle
Case Postale 38
57 rue Cuvier
75231 Paris cedex 05, France
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