-
alongside Polycotylidae. The
earliest elasmosaurids were mid-sized,
about 6 m (20 ft). In the Late Cretaceous,
elasmosaurids grew as
large as 11.5–12 m (38–39 ft)...
- 18th. The
usual number of tail
vertebrae in
elasmosaurids is 30.
Since the last tail-vertebrae of
elasmosaurids were
fused into a
structure similar to the...
-
range of 6.4–9.2
metres (21–30 ft). It can be
distinguished from
other elasmosaurids by the
following characteristics:
there is a long
distance between the...
-
Albertonectes is also
unique among other elasmosaurids in
having 76 neck vertebrae, a
record number among elasmosaurids.
Callawayasaurus with a
similar count...
-
elongated heads with
narrow snouts.
During the Late Cretaceous, the
elasmosaurids still had many species. All
plesiosaurs became extinct as a
result of...
- 5 cm (1 ft 2.8 in) long. It can be
distinguished from all
other known elasmosaurids by a
unique combination of
characteristics as well as two otherwise...
- plesiosaur,
named by
Welles in 1943. Thal****omedon is
among the
largest elasmosaurids, with the
holotype measuring 10.86
metres (35.6 ft) long and weighing...
- long. It has one of the
longest necks relative to
total length among elasmosaurids, with 60
vertebrae in total. It had a
small head that
measured about...
- an
elasmosaurid (the
remains of short-necked
plesiosaurs are more
common in
comparable rocks in Canada). The
remains of
comparable elasmosaurids are...
- plesiosaurs,
including the
possible aristonectine elasmosaurid Opallionectes,
other indeterminate elasmosaurids, the
giant pliosaurid Kronosaurus, and polycotylid-like...
