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Stem sarcopterygians have primitive polybasal fin articulation
sarcopterygians fin–limb transition stylopod shoulder girdle polybasal fin articulation
2014/3/26
Among osteichthyans, basal actinopterygian
fishes (e.g. paddlefish and bowfins) have paired
fins with three endoskeletal components (pro-,
meso- and metapterygia) articulating with
polybasal shoul...