Re: Triassic mammals?

[K and T Dykes <ktdykes@arcor.de>]

<<Were there any mammal groups that were around in the Early Triassic that
were not around in the Late Triassic?>>

As the earliest mammals by any current definition are all Upper Triassic,
Rodlox, the answer is no.

<< Are there any websites that show pictures/images of Triassic mammals?
(ideally with representatives of all the groups that were around back
then)>>

With one exception, all Triassic mammals are presently known only from
isolated teeth, and they're not generally regarded as photogenic.  The
exception is /Adelobasileus/, which is sometimes referred to as a mammal and
comes from the Carnian of Texas.  This one has kindly provided the back of a
skull.  With a length of 1.5cm, this fossil is much larger than anything
else possibly mammalian of the time.  The only contemporaries so far are two
molars from India.  By the Norian-Rhaetian teeth from Europe start
appearing.
Cheers
Trevor

Basal Mammaliaformes, Morganucodontidae, Megastrodontidae and /Hadrocodium/,
an internet directory
http://home.arcor.de/ktdykes/morganu.htm
Your internet guide to the earliest mammals - with no pictures whatsoever.
The more informative fossils for some partly Triassic genera are Lower
Jurassic.