Figure 3. The complete and separated braincase elements of Pristerodon mackayi (BP/1/2642): orbitosphenoid in (A) anterior, (B) dorsal and (C) left lateral views; complete braincase in (D) anterior, (E) dorsal, (F) ventral, (G) occipital and (H) left lateral views; parabasisphenoid in (I) dorsal, (J) right lateral and (K) ventral views. aptr, anterior (palatal) ramus of the pterygoid; bo, basioccipital; bpdc, basisphenoidal dorsal subvertical concavity; bpt, basisphenoidal tubera; bpvsu, basisphenoidal ventral sulcus; clp, clinoid process; co, crista oesophagea; ds, dorsum sellae; eo, exoccipital; eobg, exoccipital posterior bulge; eobt, exoccipital subvertical buttress; epi, epipterygoid; fu, pterygoid anteroposterior furrow; hpl, horizontal plate; ic, internal carotid foramina; lvb, opisthotic lateral vertical buttress; mpw, mesethmoid posterior wall; obdn, the orbitosphenoid dorsal notch; obvp, orbitosphenoid medial vertical process; obw, orbitosphenoid wings; ofc, olfactory cavity; op, opisthotic; osu, opisthotic posterior vertical sulcus; ovmp, opisthotic ventromedial process; pab, prootic anterior bulge; pad, pila antotica anterior depression; pbs, parabasisphenoid; pdp, prootic dorsal process; pr, prootic; ps, parasphenoid rostrum; psgr, parasphenoid rostrum dorsal groove; pt, pterygoid; pt amp, anteromedial process of the pterygoid; pt dsu, ptergoid dorsal sulcus; ptll, pterygoid lateral lamina; ptlp, pterygoid lateral process; ptmp, pterygoid median plate; pt nt, pterygoid anteroposterior notch; ptqr, pterygoid quadrate ramus; ptvt, pterygoid ventral trench; sap, supraoccipital anteriorly projected crest; sar, supraoccipital anterior recess; slr, supraoccipital lateral recess; sor, supraoccipital anterior horizontal ridges; spp, supraoccipital posterior process; su, supraoccipital; stu, sella turcica; tse, tuberculum sellae. Scale bars equal 5 mm. The first scale serves for (A-C), the second for (D-H) and the third for (I-K).