Figure 8 in Phylogenetic affinities and taxonomy of the Oligocene Diomedeoididae, and the basal divergences amongst extant procellariiform birds

Figure 8. Bones of extant procellariiform taxa to illustrate osteological features used in the phylogenetic analysis. A, B, ventral view of beak of A, Fulmarus glacialis (Procellariidae) and B, Bulweria bulwerii (Procellariidae); inset in A showing details of striae along inner margin of rhamphotheca. C, skull of Fregetta tropica (Oceanitinae). D, E, orbital region of D, Fr. tropica and E, Fu. glacialis. F, furcula of Oceanites oceanicus (Oceanitinae). G, H, os carpi ulnare of G, Pelagodroma marina (Oceanitinae) and H, Lugensa brevirostris (Procellariidae). I, J, humerus (caudal view) of I, L. brevirostris and J, Pe. marina. K–M, carpometacarpus of K, O. oceanicus, L, Puffinus huttoni (Procellariidae), and M, L. brevirostris. Abbreviations: afu, apophysis furculae; cbr, crus breve; ect, os ectethmoidale; fen, elongate fenestra delimited by dorsal margin of os lacrimale; fos, subovate fossa in rostral half of ventral surface of bill of Fulmarus, Macronectes, and Daption; fpn, second (dorsal) fossa pneumotricipitalis; lac, distal extension of os lacrimale; ldg, ledge on caudal humerus surface; orb, foramen orbitonasale; pis, processus pisiformis; prc, process formed by midsection of lateral margin of os ectethmoidale; str, striae along inner margin of rhamphotheca; tbd, tuberculum dorsale; tub, rostrodorsally directed tubular nostril of Fregetta tropica; unc, os uncinatum. Scale bars = 10 mm, except for G and H = 2 mm.