- Clepsydrops. Like Archaeothyris,
Protoclepsydrops resembled a
modern lizard in
superficial appearance. However,
Protoclepsydrops had
primitive vertebrae with...
-
lineages both
still persist today. The
oldest known fossil synapsid is
Protoclepsydrops from
about 312
million years ago,
while the
oldest known sauropsid...
- with the
fossils of
Echinerpeton and
perhaps an even
earlier genus,
Protoclepsydrops,
representing just one of the many
stages in the
evolution of mammals...
- the
temporal fenestra,
which indicates this is an
early synapsid.
Protoclepsydrops also from Nova
Scotia is
slightly older but is
known by very fragmentary...
-
Incertae sedis †Dimacrodon †Driveria †Gorgodon †Knoxosaurus †Mastersonia †
Protoclepsydrops?...
- Clade:
Amniota Clade:
Synapsida Osborn, 1903
Subgroups †Asaphestera †
Protoclepsydrops? †Diadectomorpha? †Caseasauria †Caseidae †Eothyrididae †Phreatophasma...
-
Stereophallodon and
Stereorhachis are
included in the Ophiacodontidae.
Protoclepsydrops was also
regarded as ophiacodontid,
however there is
debate as to whether...
-
hundreds more
skeletons have been found,
including the
oldest synapsid,
Protoclepsydrops. Sahney, S., Benton, M.J. & Falcon-Lang, H.J. (2010). "Rainforest collapse...
-
Incertae sedis †Dimacrodon †Driveria †Gorgodon †Knoxosaurus †Mastersonia †
Protoclepsydrops?...
-
Incertae sedis †Dimacrodon †Driveria †Gorgodon †Knoxosaurus †Mastersonia †
Protoclepsydrops?...
