Prehistoric Models: Lobe-Finned Fish

Osteichthyes meaning “bony fish” are a diverse taxonomic group fish that have skeletons composed of bone instead of cartilage. There are two groups Actinopterygii more commonly known as “ray-finned fish”; including tuna, salmon, goldfish, etc… The other group are Sarcopterygii more commonly known as “lobe-finned fish”; including lungfish and coelacanths.

Kingdom: Animalia – Phylum: Chordata – Clade: Teleostomi – Superclass: Osteichthyes – Clade: Sarcopterygii

(lungfish, coelacanths, and Tiktaalik)

Genus and species: Latimeria chalumnae  

Common name: West Indian Ocean Coelacanths

Pronounced: See-lo-can-th

Named By: J.‭ ‬L.‭ Smith‭ ‬-‭ ‬1939

Classification: Clade: Sarcopterygii – Clade: ‬Tetrapodomorpha – ‬Subclass: Actinistia – Order: Coelacanthiformes – Family: ‬Latimeria

Known locations: South and west cost of Africa

Time period: Holocene

Size: 170 centi‬meters long

Diet: Carnivore

Genus: Eusthenopteron

Pronounced: You-sten-op-teh-ron

Species: E.‭ ‬foordi‭ (‬type‭)‬,‭ E. jenkinsi, ‬E.‭ ‬savesoderberghi

Named By: J.‭ ‬F.‭ ‬Whiteavis‭ ‬-‭ ‬1881

Classification: Clade: Sarcopterygii – Clade: ‬Tetrapodomorpha – ‬Order: Osteolepidida – Family: ‬Tristichopteridae

Known locations: Canada,‭ ‬Quebec,‭ ‬Miguasha‭

Time period: Devonian (Givetian to Frasnian)

Size: 1.8‭ ‬meters long

Diet: Carnivore

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