Amniotes (tetrapod vertebrate animals with a terrestrially adapted eggs)
are traditionally divided into three categories:
Anapsids - Animals with a box-like skull without openings.
This group includes the early reptiles of the Carboniferous and Permian
periods (and to a limited extent the
and includes animals such Scutosaurus.
This group may also include turtles, however many scientists believe
that turtles are actually descended from Diapsid reptiles which lost
their skull openings.
Diapsids - Reptiles with two temporal holes (fenestra) in their skulls,
and their descendents. This group includes archosaurs (including
crocodilians, dinosaur species
and birds), as well as lepidosaurs such as lizards, snakes, and sphenodonts
- even though many of these groups have lost one hole (lizards), both holes (snakes),
or have heavily modified skulls (birds).
Our company's websites' content (including this website's content) includes advertisements for
our own company's websites, products, and services,
and for other organization's websites, products, and services.
In the case of links to other organization's websites,
our company may receive a payment, (1) if you purchase products or services,
or (2) if you sign-up for third party offers, after following links from this website.
Unless specifically otherwise stated, information about other organization's products and services,
is based on information provided by that organization,
the product/service vendor, and/or publicly available information - and should
not be taken to mean that we have used the product/service in question.
Additionally, our company's websites contain some adverts which we are paid
to display, but whose content is not selected by us, such as Google AdSense ads. For more
detailed information, please see Advertising/Endorsements Disclosures