Enchiridion • 2/26/2021
Pharyngolepis - Slow Benthic Swimmer
Exploring this slow-moving bottom-dwelling fish
6 min read• Jawless Fish · Devonian
Origins
Ichthyostega
The greatest transition in vertebrate history - when fish crawled onto land and gave rise to all terrestrial vertebrates, including us.
150+ videos • 100M+ views
Subcategories
Early Vertebrates: Jawless Fish
The first vertebrates - jawless fish of the Paleozoic
11 videos
First Tetrapods: Fish to Land
The critical transition from water to land
3 videos
Early Amphibians
The first fully terrestrial vertebrates
10 videos
Transitional Forms
Creatures that blur the line between fish and tetrapod
3 videos
Early Chordates
The earliest ancestors of all vertebrates
2 videos
Videos (28)
Enchiridion • 2/26/2021
Jamoytius - Ancient Jawless Fish
Exploring this primitive jawless fish from the Silurian
6 min read• Jawless Fish · Silurian
Enchiridion • 2/19/2021
Boreaspis - Devonian Agnathan Vertebrate
Exploring the northern jawless fish
6 min read• Jawless Fish · Devonian
Enchiridion • 2/19/2021
Hemicyclaspis - Early Jawless Fish
Exploring an early armored jawless fish
6 min read• Jawless Fish · Devonian
Enchiridion • 2/19/2021
Darthmuthia - Bottom-Feeding Jawless Fish
Exploring the bottom-dwelling jawless fish
6 min read• Jawless Fish · Devonian
Enchiridion • 2/12/2021
Tremataspis - Agnathan Jawless Fish
Exploring the shield-shaped jawless fish
6 min read• Jawless Fish · Silurian
Enchiridion • 2/12/2021
Thelodus - 8-Inch Long Agnathan Carnivore
Exploring the small predatory jawless fish
6 min read• Jawless Fish · Silurian
Enchiridion • 2/5/2021
Drepanaspis - Frying Pan-Shaped Fish
Exploring the bizarrely shaped Devonian fish
6 min read• Jawless Fish · Devonian
Enchiridion • 2/5/2021
Doryaspis - A Weird Devonian Fish
Exploring the unusual spined jawless fish
6 min read• Jawless Fish · Devonian
Enchiridion • 2/5/2021
Pteraspis - Devonian Jawless Fish
Exploring the armored jawless fish
6 min read• Jawless Fish · Devonian
Enchiridion • 1/29/2021
Arandaspis - A Bizarre Ordovician Fish
Exploring one of the earliest known fish
6 min read• Jawless Fish · Ordovician
Enchiridion • 1/29/2021
Promissum - Primitive Conodont
Exploring the early jawless vertebrate
5 min read• Conodonts · Cambrian
Enchiridion • 1/29/2021
Pikaia - Primitive Chordate
Exploring one of the earliest known chordates
6 min read• Chordates · Cambrian
Enchiridion • 1/22/2021
Peltobatrachus - A Terrestrial Amphibian
Exploring the armored terrestrial amphibian
6 min read• Amphibians · Triassic
Enchiridion • 1/22/2021
Platyhystrix - Sailed Temnospondyl Amphibian
Exploring the amphibian with a distinctive sail
6 min read• Amphibians · Permian
Enchiridion • 1/15/2021
Cacops - Tiny Dissorophid
Exploring the small armored amphibian
6 min read• Amphibians · Permian
Enchiridion • 1/15/2021
Greererpeton - Aquatic Stem Tetrapod
Exploring the eel-like aquatic tetrapod
6 min read• Tetrapods · Carboniferous
Enchiridion • 1/15/2021
Crassigyrinus - Aquatic Carnivorous Amphibian
Exploring the aquatic predator of the Carboniferous
7 min read• Amphibians · Carboniferous
Enchiridion • 1/8/2021
Eucritta - Creature from the Black Lagoon
Exploring the mysterious early tetrapod
6 min read• Tetrapods · Carboniferous
Enchiridion • 1/8/2021
Acanthostega - Transitional Early Stem-Tetrapod
Exploring a crucial link between fish and tetrapods
7 min read• Tetrapods · Devonian
Enchiridion • 1/8/2021
Gerrothorax - An Amphibian with Larval Stage Gills
Exploring the unique amphibian that retained larval features
7 min read• Amphibians · Triassic
Enchiridion • 1/1/2021
Mastodonsaurus - Enormous Ancient Amphibian
Exploring one of the largest amphibians to ever exist
7 min read• Amphibians · Triassic
Enchiridion • 1/1/2021
Paracyclotosaurus - Giant Temnospondyl Amphibian
Exploring this massive temnospondyl amphibian
7 min read• Amphibians · Triassic
Enchiridion • 12/25/2020
Diplocaulus - Triangular-Shaped Amphibian
Exploring this unique amphibian with a distinctive head shape
6 min read• Amphibians · Permian
Enchiridion • 12/25/2020
Seymouria - Slow-Moving Terrestrial Carnivore
Exploring this ancient terrestrial predator
6 min read• Amphibians · Permian
Enchiridion • 12/18/2020
Eryops - Large Permian Predator
Exploring this massive amphibian predator
6 min read• Amphibians · Permian
Enchiridion • 12/18/2020
Pholiderpeton: Powerful Predatory Swimmer
Exploring this ancient amphibian predator
6 min read• Amphibians · Carboniferous
Enchiridion • 12/11/2020
Ichthyostega - Devonian Stem Tetrapod
Exploring one of the earliest four-limbed vertebrates
7 min read• Evolution · Devonian