Sarcoptyrigians includes all lobed finned fishes and is one of the two classes in which all boney fish are seperated into. Sarcopterygians can be further split into at least lineages: the dipnoi and the actinistia. There are several characteristics which unites all sarcoptyrigians. They have monobasic paired fins, that is, their fins only have one bone connecting the fins. Furthermore, these have muscular fin bases. Their teeth are covered in enamel. Lastly, all sarcoptyrigians have at least 4 bones comprising their sclerotic ring around the eye. Technically, we can even classify a human as a Sarcopterygian, despite it not being a "fish." This is because we, like the sarcopts, have lobed fins. Furthermore, we have enamel on our teeth. It should be noted that the 4+ rings around the sclerotic ring is often reduced or completely absent in mammals.
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