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Re: What did Spinosaurus eat? New species of Lepidotes found
On Sat, Feb 19, 2011 at 5:17 AM, Emily Vickers <email@example.com> wrote:
> A new species of Lepidotes from Morocco is described in the latest issue of
> Palaeontologia Electronica. Lepidotes pankowskii, found in the Cenomanian Kem
> Kem beds of Morocco, reached an estimated length of 1.6 meters. That would be
> nice size for Spinosaurus to lunch on.
You should have seen the one that got away.
The evidence that spinosaurids were semi-aquatic now seems pretty
compelling, especially in light of isotopic data. While on the topic
of semi-aquatic theropods, there is also Andrea Cau's hypothesis that
the Madagascan abelisaurid _Majungasaurus_ was also semi-aquatic. The
topic was thrashed out in Darren Naish's blog a few years ago.
Note in particular Andrea's comments in support (e.g., #17) and
Darren's comment #29, in which he concedes that relatively minor
osteological changes in certain non-avian theropod taxa might indicate
Nevertheless, IMHO it is curious that it was not until the evolution
of Avialae that dinosaurs became specialized for fully aquatic habits.
Some (like the spinosaurids) flirted; but none 'took the plunge'.