Fig 1.
Sketch map of Rio Grande do Sul showing the outcrop area of the Santa Maria sequence (shaded) and approximate location of the type-locality (star) of Clevosaurus brasiliensis Bonaparte and Sues, 2006 [11].
Fig 2.
Clevosaurus brasiliensis Bonaparte and Sues, 2006 [11] MCN-PV 2852, skull.
Photographs (A-C) in dorsal (A), palatal (B), and lateral (C) views. Scale bar equals 5 mm.
Fig 3.
Clevosaurus brasiliensis Bonaparte and Sues, 2006 [11] MCN-PV 2852, skull.
Schematic drawings (A-C) in dorsal (A), palatal (B), and lateral (C) views. Scale bar equals 5 mm. Abbreviations: bo, basiocciopital; bs, basisphenoid; ect, ectopterygoid; exoccipital; f, frontal; j, jugal; m, maxilla; n, nasal; p, parietal; pal, palatine; pf, postfrontal; pm, premaxilla; pmt, premaxilla tooth; po, postorbital; prf, prefrontal; pt, pterygoid; q, quadrate; sb, secondary bone; sbf, suborbital fenestra; so, supraoccipital; sq, squamosal; st, supratemporal.
Fig 4.
Clevosaurus brasiliensis Bonaparte and Sues, 2006 [11] MCN-PV 2852, right dentary.
Photographs (A and C) and schematic drawings (B and D), in lateral (A-B) and lingual (C-D) views. Scale bar equals 5 mm. Abbreviations: a, angular; d, dentary; mfo, mandibular foramen; mgr, Meckel’s groove; par, prearticular; sb, sencondary bone.
Fig 5.
Results of cladistic analysis, recovered 14000 most parsimonius tress with 255 steps.
A, Strict Consensus Tree. B, Tree obtained by iterPCR protocol (a-m indicate the unstable taxa pruned from cladogram and their possible positions).