- the
absence of a well-developed talonid. The
traditional group of '
symmetrodonts'
ranges in age from the
latest Tri****ic to the Late Cretaceous, but...
- cynodont); 3,
Microconodon (a Tri****ic eucynodont); 4,
Spalacotherium (a
Cretaceous "
symmetrodont"); 5,
Amphitherium (a Jur****ic
prototribosphenid mammal)...
-
Zhangheotheriidae is a
possibly paraphyletic family of "
symmetrodont"
mammals that is
currently known from
Early Cretaceous deposits in
China and Russia...
- shuotheriids, australosphenidans, eutriconodonts, multituberculates,
symmetrodonts,
dryolestids and
boreosphenidans but
mostly remain small.
First birds...
- taxa that are
closer to Mus
musculus (the
house mouse) than to the "
symmetrodont"
Spalacotherium tricuspidens.
Cladotheria incorporates a set of nested...
- 'Symmetrodonta',
though now
generally considered more
basal than true
symmetrodonts. All
members of
Kuehneotheriidae which have been
found so far are represented...
-
fossil mammals from the
Mesozoic Era. It
includes both the
extinct symmetrodonts and the
living Cladotheria.
Trechnotheria has been ****igned various...
-
Zhangheotherium is an
extinct genus of "
symmetrodont"
mammal from the
Early Cretaceous of China. A
single species is known,
Zhangheotherium quinquecuspidens...
- cynodont); 3,
Microconodon (a Tri****ic eucynodont); 4,
Spalacotherium (a
Cretaceous "
symmetrodont"); 5,
Amphitherium (a Jur****ic
prototribosphenid mammal)...
-
early mammals such as
docodonts (like Docodon), multituberculates,
symmetrodonts, and triconodonts.
Dinosaurs that
lived alongside Stegosaurus included...
