- and zhangheotheriids.
There are some
symmetrodonts with acutely-triangulated
molar cusps (“acute-angled
symmetrodonts”) that seem to form a true monophyletic...
- 1997 description. The
specific name is
Latin for "five-cusped teeth". "
Symmetrodonts" and
other archaic mammals such as
multituberculates and monotremes...
-
derived traits (apomorphies).
Their teeth differed from
those of the "
symmetrodonts" by the
evolution of a
talonid shelf (hypoflexid) on the
lower molars...
- shuotheriids, australosphenidans, eutriconodonts, multituberculates,
symmetrodonts,
dryolestids and
boreosphenidans but
mostly remain small.
First birds...
- late-surviving
symmetrodont mammal. This
would still infer a
ghost lineage for
symmetrodonts, but a more
plausible one, as
symmetrodonts persisted into...
-
early mammals such as
docodonts (like Docodon), multituberculates,
symmetrodonts, and triconodonts.
Dinosaurs that
lived alongside Stegosaurus included...
- in this region, such as Fruitafossor, docodonts, multituberculates,
symmetrodonts, and triconodonts. The
flora of the
period has been
revealed by fossils...
- 'Symmetrodonta',
though now
generally considered more
basal than true
symmetrodonts. All
members of
Kuehneotheriidae which have been
found so far are represented...
- not
always closest related to each other),
while others (such as the
symmetrodonts) may fall just
outside the
therian crown group.
Eutheria Multituberculata...
- cynodont); 3,
Microconodon (a Tri****ic eucynodont); 4,
Spalacotherium (a
Cretaceous "
symmetrodont"); 5,
Amphitherium (a Jur****ic
prototribosphenid mammal)...
