Prehistoric Models: Placoderms

Placoderms are a class of armored fish that first appeared in the fossil record at the end of the Silurian period about 430 million years ago. But a majority of Placiderms lived in the Devonian period and were extinct by the beggining of the Carboniferous Period.

Kingdom: Animalia – Phylum: Chordata – Subphylum: Vertebrata – Infraphylum: Gnathostomata – Class: Placodermi

(Placoderms “armored fish”)

Genus: Groenlandaspis “Greenland shield”.

Pronounced: Green-land-as-piss.

Named By: Heintz‭ ‬-‭ ‬1932.

Species: G. mirabilis (type). G. antarctica, G. disjectus, G. pennsylvanica, G. potyi, G. riniensis, G. seni, G. theroni, G. thorezi.

Classification: Class: ‬Placodermi, – ‬Order: Arthrodira,‭ – Family: Groenlandaspidae.

Locations: Global

Time period: Late or Upper Devonian.

Size: Up to 9‭ ‬meters long.

Diet: Carnivore

Genus: Dunkleosteus ‭”‬Dunkle’s bone‭”‬.

Pronounced: Dun-kel-os-tee-us.

Named By: Lehman‭ ‬-‭ ‬1956.

Species: D.‭ ‬terrelli‭ (‬type‭)‬,‭ ‬D.‭ ‬amblydoratus,‭ ‬D.‭ ‬marsaisi,‭ ‬D.‭ ‬raveri.

Classification: Class: ‬Placodermi, – ‬Order: Arthrodira,‭ – Family: Dunkleosteidae.

Locations: Canada.‭ ‬USA.‭ ‬Europe.‭ ‬Morocco.

Time period: Late Devonian (Frasnian to Famennian).

Size: Up to 9‭ ‬meters long.

Diet: Carnivore/Piscivore.

Genus: Dunkleosteus ‭”‬Dunkle’s bone‭”‬.

Pronounced: Dun-kel-os-tee-us.

Named By: Lehman‭ ‬-‭ ‬1956.

Species: D.‭ ‬terrelli‭ (‬type‭)‬,‭ ‬D.‭ ‬amblydoratus,‭ ‬D.‭ ‬marsaisi,‭ ‬D.‭ ‬raveri.

Classification: Class: ‬Placodermi, – ‬Order: Arthrodira,‭ – Family: Dunkleosteidae.

Locations: Canada.‭ ‬USA.‭ ‬Europe.‭ ‬Morocco.

Time period: Late Devonian (Fransian to Famennian).

Size: Up to 9‭ ‬meters long.

Diet: Carnivore/Piscivore.

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