Transcript Phanerozoic Diversity The Tommotian Fauna- “small shelly” fossils The Tommotian Fauna- “small shelly” fossils.

Phanerozoic Diversity
The Tommotian Fauna- “small shelly” fossils
The Tommotian Fauna- “small shelly” fossils
The Tommotian Fauna- “small shelly” fossils
The Cambrian Explosion – Haeckel’s Tree of Life
What Caused the Cambrian Explosion?
Intrinsic Factors –Biological Evolutionary Process
Origin of predation (eyes/swimming)
Extrinsic Factors – Related to Environmental “Triggers”
The rise of O2
Origin of shells (phosphatic/calcareous)
The Cambrian Explosion – Origin of Animal Phyla
The Cambrian Explosion – Origin of Animal Phyla
The Cambrian Explosion – Origin of Animal Phyla
Treptichnus pedum
The Cambrian Explosion – Origin of Animal Phyla
The trilobites
The Cambrian Explosion – Origin of Animal Phyla
The Trilobites
The Cambrian Explosion – The Burgess Shale Laggerstätte
The Cambrian Explosion – The Burgess Shale Laggerstätte
The Cambrian Explosion – The Burgess Shale Laggerstätte
The Cambrian Explosion – The Burgess Shale Laggerstätte
The Cambrian Explosion – The Burgess Shale Laggerstätte
The Cambrian Explosion – The Burgess Shale Laggerstätte
Marrella Splendens
The Cambrian Explosion – The Burgess Shale Laggerstätte
Marrella Splendens
Phanerozoic Diversity – the Sepkoski Curve
Phanerozoic Diversity – the Sepkoski Curve
Phanerozoic Diversity – the Sepkoski Curve
Phanerozoic Diversity – the Sepkoski Curve
Phanerozoic Diversity – the Sepkoski Curve
From Strother, Servais & Vecoli, 2010
Number of OWP genera
Phanerozoic Diversity – the Alroy Curve
Fig. 3 Sampling-standardized Phanerozoic diversity curve for the three marine evolutionary faunas.
J Alroy Science 2010;329:1191-1194
Published by AAAS
Fig. 1 Diversity trajectories of six marine groups having standardized diversity levels with
peaks of at least 100 genera or medians of at least 20 genera.
J Alroy Science 2010;329:1191-1194
Published by AAAS
Pangea