Harry Govier Seeley (1839-1909)
was a British paleontologist.
He is best remembered for having
classified dinosaurs into two major groups:
Ornithischia (meaning "bird-hipped")
and
Saurischia (meaning "lizard-hipped"),
based on the type of pelvic bones.
Prior to Seeley's work, paleontologist had
been classifying different types of dinosaurs
in all sorts of different ways, however
Seeley's system seems to be the correct one and is still used today.
However, Seeley did make one error in this matter: he argued
that
Ornithischia and
Saurischia
must have originated separately.
Today, however scientists believe that both groups of dinosaurs evolved
from a common ancestor during the
Triassic period.
Seeley also wrote an important work on
Pterosaurs,
entitled Dragons of the Air. In this book, he argued that
Pterosaurs
were active warm-blooded bird-like flying animals
(previously
Sir Richard Owen
had argued that they were cold-blooded sluggish and only glided).
Today, many scientists agree that Seeley's position
on Pterosaurs,
was the correct one.
Seeley however argued that
Pterosaurs
and birds had a common origin. Today however, scientists believe that the two groups
evolved separately.
As well as the above, Seeley also named and described many different
types of dinosaurs.
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