Wanted: Oscar Obsidian - Auckland Museum
Wanted: Oscar Obsidian - Auckland Museum
Wanted: Oscar Obsidian - Auckland Museum
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Background<br />
Other dinosaurs fossils indicate the existence of<br />
agile ornithopod dinosaurs and large<br />
four-footed sauropods.<br />
Theropod Dinosaurs<br />
Theropods were agile<br />
predators that walked<br />
upright on strong hind<br />
legs, had short front<br />
legs and large heads<br />
with sharp teeth.<br />
Tyrannosaurus and<br />
Allosaurus were<br />
theropods. The cast<br />
on display is of<br />
Cryolophosaurus, an<br />
Antarctic dinosaur.<br />
One small species of<br />
theropods evolved into the<br />
first birds around 150 million<br />
years ago.<br />
Sauropod Dinosaurs<br />
Sauropods were large four footed dinosaurs with<br />
long necks and tails. They were herbivores which<br />
probably lived in herds. A fragment of rib bone<br />
has been found in New Zealand.<br />
Ornithopod Dinosaurs<br />
Ornithopod dinosaurs were bird-hipped dinosaurs<br />
which were herbivorous and walked exclusively on<br />
their back legs. Part of a pelvis has been found<br />
in New Zealand.<br />
Icthyosaur fossil.<br />
Cryolophosaurus.<br />
<strong>Auckland</strong> <strong>Museum</strong> 17<br />
Pterosaurs<br />
Pterosaurs were flying reptiles, not<br />
dinosaurs. They had bat-like wings<br />
formed by a membrane of skin,<br />
although only the fourth finger<br />
was elongated to support<br />
the wing whereas<br />
all four fingers in bats<br />
are elongated. Two<br />
small bones have<br />
been found in New<br />
Zealand.<br />
Marine Reptiles -<br />
Mosasaurs, Plesiosaurs<br />
and Icthyosaurs<br />
Mosasaurs were giant<br />
marine lizards similar to<br />
Komodo dragons. At least<br />
five species were known in New<br />
Zealand. Mosasaurs were predators<br />
that grew as long as 12 metres.<br />
Plesiosaurs were predators with small heads,<br />
sharp teeth and limbs which were paddle-shaped.<br />
Some grew to 13metres long. Elasmosaurs were<br />
long-necked forms, while Pliosaurs were shortnecked<br />
forms. The plesiosaur fossil on display<br />
was removed recently from the Kaikoura region.<br />
Icthyosaurs were fast-swimming marine predators<br />
like dolphins (although dolphins are mammals).<br />
They probably fed on squid-like belemnites.