Figure 2
From: Anatomy and evolution of the pectoral filaments of threadfins (Polynemidae)
X-ray microcomputed tomographies of left pectoral girdle in medial view; (a) Pentanemus quinquarius, Polynemidae; (b) Polydactylus opercularis, Polynemidae; (c) Polynemus multifilis, Polynemidae; (d) ventral view of pectoral radial 3 of P. multifilis, Polynemidae; (e) Cynoscion striatus, Sciaenidae. Cl, cleithrum; Co, coracoid; F, pectoral filaments; PcPr; postcoracoid process; PR1–4, pectoral radial 1–4; Ptg, propterygium; R, pectoral-fin rays; Sc, scapula; Scl, supracleithrum. Arrow indicates site of articulation between pectoral radial 3 and the dorsalmost pectoral filament in (d); postcoracoid process broken distally in (a).
