Where does “Sarcopterygii” come from?

Sarcopterygii (Translingual) comes from Ancient Greek σάρξ, from Ancient Greek στέμμα, from Ancient Greek στέφω, from Proto-Hellenic stékʷʰō, from Proto-Indo-European stegʷʰ- — to enlace.

Sarcopterygii (Translingual): Lungfish, coelacanths, all Tetrapoda, and their extinct relatives; the lobe-finned fishes

Definitions

Lungfish, coelacanths, all Tetrapoda, and their extinct relatives; the lobe-finned fishes

Ancestry of “Sarcopterygii”, step by step

Sarcopterygii traces back through two separate lines of ancestry.

via Ancient Greek σάρξ

Step	Language	Word	Meaning
1	Ancient Greek	σάρξ	The material which covers the bones of a...
2	Ancient Greek	στέμμα	wreath, garland, chaplet; pedigrees, family trees
3	Ancient Greek	στέφω	I put around; I encircle, crown, wreath, garland
4	Proto-Hellenic	stékʷʰō	to enlace, crown, encircle
5	Proto-Indo-European	stegʷʰ-	to enlace

via Ancient Greek πτέρυξ

Step	Language	Word	Meaning
1	Ancient Greek	πτέρυξ	wing; feathers; fins
2	Ancient Greek	πτερόν	feather; wing; Any winged creature
3	Proto-Indo-European	péth₂r̥	wing; feather
4	Proto-Indo-European	peth₂-	to spread out; to fly

Every word from Proto-Indo-European stegʷʰ- →Every word from Proto-Hellenic stékʷʰō →Every word from Ancient Greek στέφω →