Fossil shearwater and cormorant from the Horcon Formation.

Proximal fragment of a fossil left tarsometatarsus assigned as Puffinus cf. griseus (SGO-PV 21490) in (A) dorsal, (C) plantar and (E) proximal views; and (F) sketch showing the details of the proximal surface. Proximal section of the same element in the extant great shearwater (Puffinus gravis) in (B) dorsal, (D) plantar and (G) proximal views. Partial wings and pectoral girdle of the small cormorant Phalacrocorax sp. (SGO-PV 21443): (H) fragment of right ulna in dorsal view; (I) right coracoid in dorsal view; (J) proximal fragment of left scapula in medial; (K) left coracoid in ventral view; (L) proximal fragment of left humerus in caudal view; (M) left radius lacking of proximal end in ventral view; (N) left ulna lacking of proximal end in ventral view; and (O) proximal fragment of left carpometacarpus in ventral view.