Class Sarcopterygii
Fish Fossils
(Lobe Finned Fish)

Phylum Chordata
Subphylum Vertebrata

Related interest:
Class Actinopterygii
Class Actinopterigii Fish Fossils
Class Chondrichthyes
Class Chondrichthyes Fish Fossils
Class Sarcopterygii
Class Placodermi

 
Phylum Chordata
Subphylum Vertebrata
Infraphylum Gnathostomata
Superclass Osteichthyes
Class Sarcopterygii
Subclass Coelacanthimorpha (Coelacanths)
Subclass Dipnoi (Lungfishes)
Subclass Tetrapodomorpha (Tetrapods and relatives.
Members of Class Sarcopterygii, the Sarcopterygians, belong to Superclass Osteichthyes, a group or bony fishes, characterized by a bony skeleton rather than cartilage. The oldest Sarcopterygians come from the upper Silurian and closely resemble Acanthodians. The Sarcopterygians closest relatives were the Actinopterygian ray-finned fishes. The oldest Sarcopterygians date to the late Silurian. Sarcopterygians probably evolved in the oceans, but they later migrated to freshwater environments to avoid the predatory placoderms that dominanted the early to middle Devonian marine habitats. The Sarcopterygians evolved in the early Devonian to split into the Coelacanths, and the Rhipidistia. The Coelacanths appeared in the early Devonian, and became widespread in late Devonian and Carboniferous seas. The Coelacanths were once believed to have gone extinct at the end of the Cretaceous period, that is, until the first Latimeria specimen was found off the east coast of South Africa in 1938. They are known as a Lazarus taxon, i.e.,a taxon that disappears from one or more periods of the fossil record, and appears again in a later period. Since 1938, Latimeria has been found in the Comoros, Kenya, Madagascar, Mozambique, and Tanzania; many consider a Coelacanths to be living fossils.
Osteolepis macrolepidotus
Osteolepis
Caridosuctor populosum Coelacanth

Osteolepis macrolepidotus
Middle Devonian
Cruday Quarry, Scotland

Osteolepis panderi
Middle Devonian
Cruday Quarry, Scotland
Caridosuctor populosum Coelacanth
Mississippian
Bear Gulch,
Heath Shale Formation, Montana
Dipterus valenciennesi Lungfish
Middle Devonian
Achanarras Slate Quarry, Scotland
Coccoderma nudum
Coccoderma