pectoral fin proximal radial element
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Pectoral fin radial element which develops from the pectoral fin endoskeletal disc, supports a few pectoral lepidotrichia or fin rays and connects the lepidotrichia and distal radial elements with the primary pectoral girdle (scapula and coracoid). [ TAO:GA_TG ]
Term information
Two to four flat or slightly rod-like proximal pectoral radial elements, bilaterally, can be found in teleosts. Pectoral proximal radial elements are commonly hour-glass or rectangular shaped. The presence of four pectoral proximal radial elements is interpreted as a synapomorphy of teleosts (Patterson 1977, Arratia 1999).