Mesozoic Marine Life and Dinosaurs
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large opening of
uncertain function on the snout in front of the eye (antorbital fenestra) and
another at the junction of three bones in the lower jaw (mandibularArchosaurs
the longest dinosaur at the quarry from head
to tail, over 80 feet long.Diplodocus
were built like huge giraffes; they had immensely
long necks and relatively short tails.Brachiosaurus
lived about 145 million years ago, during the Jurassic period.
Part of the theropod family—a group of dinosaurs that ran on two feet—this
dino could grow up to 40 feet from head to tail,Allosaurus
large, heavily built, herbivorous quadrupeds with rounded backs, short fore
limbs, long hind limbs, and tails held high in the air.Stegosaurus
These animals shared the seas with the first
aquatic crocodiles, which had fins instead of legs, and with teleosts,
predecessors of most fish today.Ichthyosaurus
a vast aquatic reptile with a long neck and fins that gave it a lot of agility to
hunt its prey.Plesiosaur
a genus of large theropod
dinosaur that lived approximately 66 to 68 million years ago during the lateTyrannosaurus
large, quadrupedal, plant-eating
ceratopsian dinosaur
“three-horned face,”Triceratops
Fossils have shown that it had quill knobs on
its forearms, indicating the presence of feathers.Velociraptor
small, four-winged dinosaur. It had long feathers on its
arms, legs, and tail, which suggests it was capable of gliding or possibly even
powered flight.Microraptor
the first true bird, had feathered
wings and tail, along with dinosaur-like teeth and a bony tail.Archaeopteryx
one of
the first non-avian dinosaurs discovered with fossilized feathers.Sinosauropteryx
one of the largest
known feathered dinosaurs.Yutyrannus
diverse group of marine cephalopods, They
had coiled shells with intricate
chambers and tentacles for feeding.Ammonoids
also known as
pelecypods, two shells connected by a
hinge and are filter feeders.Bivalves
were diverse during this
period, with genera like Spirifer and
Terebratula being common. two shells, but their internal
anatomy differs from bivalves.Brachiopods
formed reefs and provided
habitat for other marine
organisms.Corals
radial
symmetry and a spiny or
plated exoskeleton.Echinoderms
These arthropods
typically had segmented
bodies, jointed appendages,
and exoskeletons.Crustacean
They had
coiled shells and were part of
the marine ecosystems.Gastropods
a
group of mollusks that includes
squids, octopuses, and
ammonoids,Cephalopod
marine reptiles that
resembled dolphins.Ichthyosaurus
herbivorous reptiles
with beak-like snoutsRhynchosaurs
including early crocodiles and
their relatives, were present.Archosaurs
They belong to a phylum or class of Rhizarian protists characterized by
streaming granular ectoplasm for catching food and other uses.Foramineferans
large opening of
uncertain function on the snout in front of the eye (antorbital fenestra) and
another at the junction of three bones in the lower jaw (mandibularArchosaurs
the longest dinosaur at the quarry from head
to tail, over 80 feet long.Diplodocus
were built like huge giraffes; they had immensely
long necks and relatively short tails.Brachiosaurus
lived about 145 million years ago, during the Jurassic period.
Part of the theropod family—a group of dinosaurs that ran on two feet—this
dino could grow up to 40 feet from head to tail,Allosaurus
large, heavily built, herbivorous quadrupeds with rounded backs, short fore
limbs, long hind limbs, and tails held high in the air.Stegosaurus
These animals shared the seas with the first
aquatic crocodiles, which had fins instead of legs, and with teleosts,
predecessors of most fish today.Ichthyosaurus
a vast aquatic reptile with a long neck and fins that gave it a lot of agility to
hunt its prey.Plesiosaur
a genus of large theropod
dinosaur that lived approximately 66 to 68 million years ago during the lateTyrannosaurus
large, quadrupedal, plant-eating
ceratopsian dinosaur
“three-horned face,”Triceratops
Fossils have shown that it had quill knobs on
its forearms, indicating the presence of feathers.Velociraptor
small, four-winged dinosaur. It had long feathers on its
arms, legs, and tail, which suggests it was capable of gliding or possibly even
powered flight.Microraptor
the first true bird, had feathered
wings and tail, along with dinosaur-like teeth and a bony tail.Archaeopteryx
one of
the first non-avian dinosaurs discovered with fossilized feathers.Sinosauropteryx
one of the largest
known feathered dinosaurs.Yutyrannus
diverse group of marine cephalopods, They
had coiled shells with intricate
chambers and tentacles for feeding.Ammonoids
also known as
pelecypods, two shells connected by a
hinge and are filter feeders.Bivalves
were diverse during this
period, with genera like Spirifer and
Terebratula being common. two shells, but their internal
anatomy differs from bivalves.Brachiopods
formed reefs and provided
habitat for other marine
organisms.Corals
radial
symmetry and a spiny or
plated exoskeleton.Echinoderms
These arthropods
typically had segmented
bodies, jointed appendages,
and exoskeletons.Crustacean
They had
coiled shells and were part of
the marine ecosystems.Gastropods
a
group of mollusks that includes
squids, octopuses, and
ammonoids,Cephalopod
marine reptiles that
resembled dolphins.Ichthyosaurus
herbivorous reptiles
with beak-like snoutsRhynchosaurs
including early crocodiles and
their relatives, were present.Archosaurs
They belong to a phylum or class of Rhizarian protists characterized by
streaming granular ectoplasm for catching food and other uses.Foramineferans
