416 MA DEVONIAN PERIOD (57 M) (416-359
MA) Acadian
mountain building Age
of Fishes LOWER
DEVONIAN EPOCH (18.5 M) (416-397.5 MA) LOCHKOVIAN
STAGE (4.8
M)
(416-411.2
MA) 411.2 MA PRAGIAN
STAGE (4.2 M)
(411.2-407 MA) 407 MA EMSIAN
STAGE (9.5
M)
(407-397.5 MA) 400 MA Ammonites
appear (Late Silurian - Early Devonian) 397.5 MA MIDDLE DEVONIAN EPOCH
(12.2 M)(397.5-385.3 MA) EIFELIAN
STAGE (5.7
M)
(397.5-391.8
MA) 391.8 MA GIVETIAN
STAGE (6.5
M)
(391.8-385.3 MA) 385.3 MA UPPER
DEVONIAN EPOCH (26.10 M) (385.3-359.2 MA) FRASNIAN
STAGE (10.8
M)
(385.3-374.5
MA) 385 MA Eusthenopteron
- fish creature 375 MA Tiktaalik
roseae - missing link between fish and
amphibian 374.5 MA FAMENNIAN
STAGE (15.3
M)
(374.5-359.2 MA) 370 MA Large
shallow ocean spread across much of North America Cladoselache
- (up to 1 meter long) one of the most
ancient and primitive sharks (Ohio, Kentucky, Tennessee) 365 MA Horsetails
Ferns Ichthyostega - with hind limb Amphibians
appear Land
arthropods abundant