The armored head fish and the Spiny sharks

GNATHOSTOMATA Pt.1/2
Part one about the Placoderms and Acanthodians, with first evidence of true jaws, S3X and living birth.
Part two : https://youtu.be/i2GlvrJf5kE

Music by White Bat audio https://www.youtube.com/@WhiteBatAudio
Thumbnail by RJ Palmer
Illustrations by Satoshi Kawasaki
Icons next to name indicate the diet:
🪱 Invertebrates
🦂 Marine arthropods
🦴 Detritivores
🐟 Fish
🦪 Shelly mollusks
🦐 Plankton / Micro-organisms

The whole Playlist: https://youtube.com/playlist?list=PLZFljdk_R2daQUpjwiAOvjlP8M0rt5a8H

Sources and more informations about the animals shown:
Brindabella - researchgate.net/publication/325876190_New_information_on_Brindabellaspis_stensioi_Young_1980_highlights_morphological_disparity_in_Early_Devonian_placoderms
Romundina - https://en.wikipedia.org/wiki/Romundina
Gemuendina - http://www.prehistoric-wildlife.com/species/g/gemuendina.html
Yunnanolepis - https://www.diva-portal.org/smash/get/diva2:952780/FULLTEXT01.pdf
Bothriolepis - http://www.prehistoric-wildlife.com/species/b/bothriolepis.html
Microbrachius - https://www.bbc.com/news/science-environment-29661446
Pterichthyodes - https://en.wikipedia.org/wiki/Pterichthyodes
Lunaspis - http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=34294
Campbellodus - https://www.researchgate.net/figure/Gogo-placoderms-A-ptyctodontid-Campbellodus-decipiens-WAM-1191-showing-articulated_fig1_326520650
Materpiscis - https://www.abc.net.au/science/articles/2008/05/29/2257284.htm
Phyllolepis - https://www.researchgate.net/publication/213772582_Phyllolepis_rossimontina_sp_novPlacodermi_from_the_Uppermost_Devonian_at_Red_Hill_North-Central_Pennsylvania
Austrophyllolepis - https://www.researchgate.net/figure/Austrophyllolepis-ritchiei-Long-1984-from-Mount-Howitt-eastern-Victoria-a-Holotype_fig6_213776635
Incisoscutum - http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=34352
Groenlandaspis - http://www.prehistoric-wildlife.com/species/g/groenlandaspis.html
Turrisaspis - http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=402690
Rolfosteus - http://www.prehistoric-wildlife.com/species/r/rolfosteus.html
Coccosteus - http://www.prehistoric-wildlife.com/species/c/coccosteus.html
Dunkleosteus - https://www.nytimes.com/2023/03/04/science/chunky-dunk-fossil.html
Titanichthys - http://www.prehistoric-wildlife.com/species/t/titanichthys.html
Brochoadmoanes - https://www.researchgate.net/publication/213771629_Anatomy_of_the_Early_Devonian_acanthodian_Brochoadmones_milesi_based_on_nearly_complete_body_fossils_with_comments_on_the_evolution_and_development_of_paired_fins
Ischnacanthus - https://www.mindat.org/taxon-P34865.html
Diplacanthus - https://www.mindat.org/taxon-P209448.html
Acanthodes - http://www.prehistoric-wildlife.com/species/a/acanthodes.html
Homalacanthus - http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=226280
Cheiracanthus - http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=209434
Climatius - http://www.prehistoric-wildlife.com/species/c/climatius.html
Gyracanthus - http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=209918
Parexus - http://www.prehistoric-wildlife.com/species/p/parexus.html

0:00 Introduction
0:45 Placodermi
1:30 Acanthothoraci
2:00 Rhenanida
2:40 Antiarchi
5:10 Petalichthyida
5:50 Pyctodontida
7:00 Arthrodira
7:30 Actinolepidoidei
8:10 Phllyctaenioidei
12:15 Acanthodii
13:05 Ischnacanthiformes
13:45 Diplacanthiformes
14:15 Acanthodiformes
16:00 Climatiiformes

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