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Pelycosaur (/ˈpɛlɪkəˌsɔːr/ PEL-ih-kə-sor) is an
older term for
basal or
primitive Late
Paleozoic synapsids,
excluding the
therapsids and
their descendants...
- This list of
pelycosaurs is an
attempt to
create a
comprehensive listing of all
genera that have ever been
included in the
synapsida excluding therapsida...
- systematics, and non-therapsid
synapsids were also
referred to as
pelycosaurs, or
pelycosaur-grade synapsids.
These paraphyletic terms have now
fallen out...
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Comparison of ch****
teeth in
various taxa: 1, a single-cusped
pelycosaur; 2,
Dromatherium (a Tri****ic cynodont); 3,
Microconodon (a Tri****ic eucynodont);...
- (Cisuralian) saw a
major faunal turnover, with most
lineages of
primitive "
pelycosaur"
synapsids becoming extinct,
being replaced by more
advanced therapsids...
- glaciation. Hot and dry climate. A
possible drop in
oxygen levels.
Synapsids (
pelycosaurs and therapsids)
become widespread and dominant,
while parareptiles and...
-
evolved from "
pelycosaurs",
specifically within the Sphenacodontia, more than 279.5
million years ago. They
replaced the "
pelycosaurs" as the dominant...
-
constitutes the
larger Amniota clade.
Early synapsids are
referred to as "
pelycosaurs". The more
advanced therapsids became dominant during the
Middle Permian...
- the
earliest sauropsid reptiles (Hylonomus), and the
earliest known "
pelycosaur"
synapsids (Archaeothyris).
Small lizard-like
animals quickly gave rise...
- from a "
pelycosaur"
ancestor (a
poorly defined group including all
synapsids which are not therapsids). The
therapsid takeover from
pelycosaurs took place...
