-
Sphenacodontia is a stem-based
clade of
derived synapsids. It was
defined by
Amson and
Laurin (2011) as "the
largest clade that
includes Haptodus baylei...
-
whiskers unlikely.
Therapsids evolved from a
group of
pelycosaurs called sphenacodonts.
Therapsids became the
dominant land
animals in the
Middle Permian,...
- to be more
primitive than
other sphenacodonts like Dimetrodon. They
thought varanopids and Dimetrodon-like
sphenacodonts were
closely related because both...
- the
skull and the teeth. The
sphenacodontoids evolved from
earlier sphenacodonts such as
Haptodus and
Ianthodon via a
number of
transitional stages of...
-
Comparison of "pelycosaurian" skulls: 1
sphenacodont, 2 ophiacodont, 3 caseid. The
quadratojugale is green,
squamosale is red,
jugale is blue....
-
Haptodus is an
extinct genus of
basal sphenacodonts, a
member of the
clade that
includes therapsids and hence, mammals. It was at
least 1.5
metres (5 ft)...
- pelycosaurs.
Therapsids evolved from a
group of
pelycosaurs called sphenacodonts.
Therapsida consists of four
major clades: the dinocephalians, the herbivorous...
-
outdated terms rarely used in
modern literature.
Therapsids descended from
sphenacodonts, a
primitive synapsid, in the
middle Permian, and took over from them...
-
Palaeohatteriidae is an
extinct family of
basal sphenacodonts known from the
Early Permian period (****elian-Sakmarian stages) of Saxony, Germany. Two...
- moderately-sized,
lightly built carnivores,
intermediate in form
between basal sphenacodont "pelycosaurs" and more
advanced therapsids.
Biarmosuchians were rare...
