-
Permian dissorophoid Gerobatrachus hottoni is a
lissamphibian. If it is not, the
earliest known lissamphibians are
Triadobatrachus and
Czatkobatrachus from...
- "lepospondyl hypothesis" of
modern amphibian origins proposes that
lissamphibians are
monophyletic (that is, they form
their own clade) and that they...
- to
emerge from fishapods). However,
there is no
evidence of
lissamphibians or
lissamphibian-like
animals in the
fossil record at this time. The tetrapod...
- or
lissamphibians.
There are
currently three major hypotheses on the
origins of
lissamphibians. In the
temnospondyl hypothesis (TH),
lissamphibians are...
- (caecilians as lepospondyls, and
other lissamphibians as temnospondyls), the
lepospondyl hypothesis (
lissamphibians as lepospondyls), and the
newer hypothesis...
- and
basal synapsids (predecessors of mammals). The
origin of
modern lissamphibians,
which first appeared during the
Early Tri****ic,
around 250 million...
-
grade (a
paraphyletic group),
ancestral to
living tetrapods such as
lissamphibians (modern amphibians) and
amniotes (reptiles, mammals, and kin). "Labyrinthodont"-grade...
- make them more
closely related to
amniotes than to
lissamphibians. On the
other hand, if
lissamphibians are
descended from lepospondyls, then not only Lepospondyli...
- Tri****ic,
before going extinct by the end; however,
early crown-group
lissamphibians (including stem-group frogs,
salamanders and caecilians) also became...
-
contains the
tongue on the inside.
Except for some
groups like
birds and
lissamphibians,
vertebrates usually have
teeth in
their mouths,
although some fish...
