Transcript science olympiad fossil nov 17

Fossils
November 17
Genus Lingula
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Kingdom Animalia
Phylum Brachiopoda
Class Inarticulata
Cretaceous (Mesozoic)
“tailed mussel”
Filter feeder
Burrows in the sand
Genus Atrypa
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Kingdom Animalia
Phylum Brachiopoda
Class Articulata
Shells are round, egg
shaped covered with
many radial ridges
• Silurian/Devonion
(Paleozoic)
Genus Composita
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Kingdom Animalia
Phylum Brachiopoda
Class Articulata
Devonion to Permian
(end of Paleozoic)
• Smooth shell
• Rounded folds
Genus Juresania
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Kingdom Animalia
Phylum Brachiopoda
Class Articulata
Pennsylvanian to
Permian (end of
Paleozoic)
• Suspension feeder
• Fold and sulcus (groove)
• Fine lines between
Genus Leptaena
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Kingdom Animalia
Phylum Brachiopoda
Class Articulata
Ordovician to Devonion
(Paleozoic)
• Wrinkled
ornamentation and fine
linear markings
Genus Mucrospirifer
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Kingdom Animalia
Phylum Brachiopoda
Class Articulata
“winged” brachiopods
Butterfly shell
Filter feeders
Devonion (Paleozoic)
Genus Platystrophia
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Kingdom Animalia
Phylum Brachiopoda
Class Articulata
Ordovician to Silurian
(Paleozoic)
• Prominent sulcus and
fold
• Marine lime mud and
sands
• “lamp shells”
Genus Rafinesquina
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Kingdom Animalia
Phylum Brachiopoda
Class Articulata
U-shaped and wide
around the hinge
• Ordovician (Paleozoic)
• Filter feeder
• Muddy sand or silt
Order Rhynchonellida
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Kingdom Animalia
Phylum Brachiopoda
Class Articulata
Strongly ribbed wedgeshaped or nut-like shells
• Can extend their
lophophore out for
better feeding
• Ordovician through
Mesozoic
Genus Exogyra
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Kingdom Animalia
Phylum Mollusca
Class Bivalvia
Saltwater oysters
Beak curved to one side
Genus Gryphaea
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Kingdom Animalia
Phylum Mollusca
Class Bivalvia
Devil’s toe nails
Triassic to tertiary
(mesozoic)
• Two articulated valveslarge shell and flattened
smaller shell (lid)
Genus Pecten
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Kingdom Animalia
Phylum Mollusca
Class Bivalvia
Looks like a comb or
rake
• Saltwater clams
• Cretaceous to
quarternary
• Found all over the
world
Genus Pholadomya
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Kingdom Animalia
Phylum Mollusca
Class Bivalvia
Saltwater clams
mesozoic
Subclass Ammonoidea
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Kingdom Animalia
Phylum Mollusca
Class Cephalopoda
Devonion to Cretaceous
Excellent index fossilsspecific species found in
rock layers
Genus Baculites
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Kingdom Animalia
Phylum Mollusca
Class Cephalopoda
Subclass Ammonoidea
“walking stick rock”
Cretaceous
Genus Dactylioceras
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Kingdom Animalia
Phylum Mollusca
Class Cephalopoda
Subclass Ammonoidea
Jurassic-good index
fossil
• Shell’s branching ribs
that incline forward
• Died with dinosaurs
• Small in size
Order Belemnitida
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Kingdom Animalia
Phylum Mollusca
Class Cephalopoda
Subclass Coleoidea
Mesozoic
Squid-like
Hooks for catching prey
Genus Nautilus
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Kingdom Animalia
Phylum Mollusca
Class Cephalopoda
Subclass Nautiloidea
Eocene
Genus Orthoceras
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Kingdom Animalia
Phylum Mollusca
Class Cephalopoda
Subclass Nautiloidea
Often in limestone
Ordovician
Grew to 15 cm and ate
small animals
• Look like baculites but
existed before them
Genus Conus
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Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Predatory sea snails or
cone snails
• First appear in
cretaceous
Genus Cypraea
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Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Sea snails
Genus Platyceras
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Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Paleozoic sea snails
Had a symbiotic
relationship with
crinoids
Genus Turrietella
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Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Tightly coiled shells
Cretaceous to today
Genus Worthenia
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Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Devonian to triassic
Turban shaped shell
Class Asteroidea
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Kingdom Animalia
Phylum Echinodermata
Starfish or sea stars
Since ordovician
predators
Genus Pentremites
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Kingdom Animalia
Phylum Echinodermata
Class Blastoidea
Carboniferous
Related to sea lillies
(crinoids)
• Trapped food floating in
current using tentacles
• Anchored to sea floor
Class Crinoidea
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Kingdom Animalia
Phylum Echinodermata
Stems, columns, calyxes
Date back to mid
paleozoic
• Attach to sea floor
Class Echinoidea
• Kingdom Animalia
• Phylum Echinodermata
• Sea urchins, sand
dollars
• Mouth has 5 teeth
arranged in circle
(Aristotle’s lantern)
• Since ordovician
Class Ophiuroidea
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Kingdom Animalia
Phylum Echinodermata
Brittle stars
5 arms
Since ordovician
Scavengers, detritus
feeders and can prey on
small animals