Eons:
Precambrian: Earliest span of time
Phanerozoic: Everything since Camels often sit down carefully -
perhaps their joints creak
Eras:
Periods:
Paleozoic
Cambrian
Mesozoic
Ordovician
Cenozoic
Silurian
Paleozoic Devonian
“Age of
Invertebrates” Carboniferous)
Epochs:
Permian
Paleocene
Triassic
Mesozoic Eocene
Jurassic
“Age of Reptiles” Oligocene
Cretaceous
Paleogene
Cenozoic Miocene
Neogene
“Age of Pliocene
Mammals” Quaternary
Pleistocene
Holocene
We are living in the Phanerozoic Eon, Cenozoic Era, Quaternary
Period, Holocene Epoch……..BUT
Put Eggs On My Plate Please Hannah
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Artist's rendition of life in the Cambrian Sea. For a long time,
these fossils were the oldest scientists had found.
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Haikouichthys ercaicunensis
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Artist's rendition of marine life in the Ordovician
Period. Marine life was abundant and diverse.
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Nautiloid Sea star
Leptaena Bryzoans
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Spores found in 480 million-year-old rock bring
the fossil record in line with molecular
estimates of when plants first adapted to life
on land.
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Artist's rendition to silurian life.
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Armored fish: Dunkleosteus terrelli
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Artist's rendition of life in devonian. Trees and
land animals ara part of the scene.
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Ichthyostega Tiktaalik
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• The fern-like leaves of Archaeopteris, one of the
first tree-like plants. It grew to an average height of
about 10 meters, produced spores, and had a
global distribution.
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Artist's rendition of a Carboniferous swamp. This
ecosystem dominated this time period.
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Amphibians: Dominant vertebrates, such as
Eryops and Diplocaulus
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Early reptiles, Hylonomus and Anthracosaurus
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Large dragonfly, Meganeura and a millipede
Arthropleura.
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Lebachia Medullosa
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Artist's rendition of Permian life. Most of these
species will be extinct by the end of the Period.
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Synapsids: Early mammal-like reptiles, such as
Dimetrodon and Edaphosaurus.
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Therapsids: Advanced mammal-like
reptiles, like Gorgonopsids and
Lystrosaurus.
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Ichthyosaurus fossil, a marine reptile with a dolphin-
like appearance and which gave birth to living young.
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Proganochelys quenstedti
Clatrotitan scullyi
Life reconstruction of Mambawakale ruhuhu an Archosaurs which is an
early relative of crocodiles and dinosaurs
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Cycads
conifers
Ginkgo
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Artist's rendition of Jurassic life. Large reptiles dominated
the land, and birds appeared.
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Artist's rendition of life in the Cretaceous. Most of these species will not
survive the mass extinction at the end of this period. Note that the
supercontinent Pangea is breaking apart.
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Archaefructus
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Small mammals like Purgatorius and early primates
like Plesiadapis
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Ischyromys, The 60 cm (2 ft) long creature is one of the
Large, flightless bird oldest known rodents.
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Early Ungulates: Ancestors of modern
horses, rhinos, and elephants
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Early bats like Icaronycteris
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Standing 16 feet tall at the shoulder and weighing
20 tons, Paraceratherium was the largest
mammals to ever walk the Earth.
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A team of researchers from the George
Washington University and the Institut
Català de Paleontologia Miquel
Crusafont (ICP) identified a new genus
and species of small ape that existed
before the evolutionary split of
humans/great apes (hominids) and
gibbons (the “lesser apes” or
hylobatids).
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Australopithecus afarensis
(Lucy)
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