FIGURE 21. 3D in A reappraisal of the cranial and mandibular osteology of the spinosaurid Irritator challengeri (Dinosauria: Theropoda)

FIGURE 21. 3D renderings of the articulated braincase elements of Irritator challengeri (SMNS 58022). A, dorsal view; B, dorsal view with interpretative line drawings; C, ventral view; D, ventral view with interpretative line drawings. Note that bones are labelled in bold, and other anatomical structures in regular font. Abbreviations: aoc, antotic crest; boc, basioccipital; bpp, basipterygoid process; bsr, basisphenoid recess; cap, capitate process; crtu, crista tuberalis; cup, cultriform process; ds, dorsum sellae; lsp, laterosphenoid; mlsp, medial laterosphenoid process; occ, occipital condyle; osp, orbitosphenoid; oto, otoccipital; pbsp, parabasisphenoid; pit, pituitary fossa (sella turcica); pop, paroccipital process; pro, prootic; soc, supraocciptal; socc, supraoccipital crest; ssr, subsellar recess; vcm, vena capitis media foramen; V, trigeminal nerve (CN V) foramen; VI, (posterior) foramen for abducens nerve (CN VI); VII–VIII, medial fossa for entry of facial nerve (CN VII) and optic nerve (CN VIII) into prootic; XII, hypoglossal nerve (CN XII) foramen.