Figure 1
Map showing fossiliferous localities of Río Chico and Cerro Zeballos.
Figure 2
Sketch drawing of the skeleton of the common perch (Perca fluviatilis) representing a generalized percomorphacean. Shaded in red the elements here reported. Modified from Goodrich (1859)GOODRICH SG. 1859. Animal Kingdom Illustrated Vol 2, New York, p. 576..
Figure 3
Percichthyidae genus and species indeterminate. Selected cranial bones. a-c, right dentary (LIEB-PV 8003) in a, lateral; b, medial; and c, occlusal views. d-e, left dentary (LIEB-PV 8002) in d, medial, and e, lateral views. f-g, right premaxilla in f, lateral, and g, occlusal views. h-i, left maxilla (LIEB-PV 8002) in h, lateral; and g, medial views. References: ap, ascending process; arp, articular process; fo, medial foramen; lg, longitudinal groove; mf, mentonian flange; mp, mentonian process; mr, maxillary ramus; pe, posterior expansion; pr, premaxillary ramus; sy, dentary symphysis; tp, tooth patch; 1p, first pit for the mandibular sensitive canal; 2p, second pit for the mandibular sensitive canal. Scale bar: 1 cm.
Figure 4
Percichthyidae genus and species indeterminate. a-c, parasphenoid (LIEB-PV 8002) in a, ventral; b, left lateral; and c, dorsal views. d, left preopercular (LIEB-PV 8002) in lateral view. e, ceratohyal (LIEB-PV 8002) in lateral view. f-g, incomplete ceratohyal (LIEB-PV 8005) in e, lateral; and f, medial views. References: cf, ceratohyal foramen; dp, dentate posterior margin; fb, flange of bone; ne, parasphenoid neck; vp, ventral process; vs, ventral surface. Scale bar: a-c, e, 1 cm; d, h-k, 0.5 cm.
Figure 5
Percichthyidae genus and species indeterminate. Vertebrae. a-c, first precaudal vertebral centrum (LIEB-PV 8000) in a, ventral; b, dorsal; c, anterior; d, large-sized precaudal vertebral centrum (LIEB-PV 8001) in anterior view; e-f, precaudal vertebral centrum (LIEB-PV 8001) in e, ventral, and f, right lateral views. g-h, caudal vertebra (LIEB-PV 8001) in g, anterior; h, right lateral views. i, three articulated caudal vertebrae (LIEB-PV 8000) in lateral view. h-k, basioccipital (LIEB-PV 8009) in h, ventral; i, dorsal; j, left lateral; and k, posterior views. References: ae, articular surface for the exoccipital; an, articular surface for the neural arch; as, anterior articular surface; ha, haemal arch; na, neural arch; pp, posterior porcess; ps, posterior articular surface; tr, trabecular bone; vc, ventral concavity. Scale bar: 1 cm.
Figure 6
Percichthyidae genus and species indeterminate. Spines and pterygiophores. a-c, first anal pterygiophore (LIEB-PV 8004) in a, distal; b, right lateral; c, posterior views. d-f, first dorsal hyperostosed pterygiophore (LIEB-PV 8005) in d, proximal; e, posterior; and f, lateral views. g-h, fin spine (LIEB-PV 8004) in g, lateral; and h, posterior views. i, articular end of fin spine (LIEB-PV 8004) in posterior view. j-k, articular end of fin spine (LIEB-PV 8004) in j, posterior, and k, anterior views. l-m, articular end of fin spine (LIEB-PV 8004) in l, posterior; m, lateral; and n, anterior views. References: as, articular surface; cap, cup-shaped articular surface for spine; cf, central foramen; cs, concavity for preceeding spine; ck, central keel; ke, longitudinal keel; lg, longitudinal groove; lr, lateral ridge; op, osseous platform; pr, proximal radial; ri, ridge; rp, rounded process. Scale bar: a-c, g-n, 0.5 cm; d-f, 1 cm.
Figure 7
Indeterminate Calyptocephalellidae. a-d, LIEB-PV 8006-8007, right maxillae in a,c, lateral; b,d, medial views. References: am, alveolar margin; ap, asceding ramus; pp, pterygoid process; ps, palatine shelf. Sclae bar: 1 cm.
Figure 8
Indeterminate Calyptocephalellidae. a-d, LIEB-PV 8008, incomplete urostyle in a, anterior; b, dorsal; c, ventral; and d. right lateral views. References: dr, dorsal ridge; pas, proximal articuar surface. Scale bar: 1 cm.
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