Figure 4 in Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes)

Figure 4. Three-dimensional snapshots of the quadrate and skull roof of Jeholornis STM 3-8: lateral (A), medial (B) and caudal (C) views of the right quadrate; dorsal (D) and ventral (E) views of the frontals; dorsal (F), ventral (G) and caudal (H) views of the braincase. Scale bar: 5 mm. Arrows indicate the rostral direction. Labels for articular facets are in red. Dashed lines indicate broken margins. Abbreviations: a.n, nasal articulation; a.pa, parietal articulation; bsr, basisphenoid recess; cup, cultriform process; lc, lateral condyle of quadrate; mc, medial condyle of quadrate; nc, nuchal crest; oc, occipital condyle; op, orbital process of quadrate; om, obital margin; otp, otic process of quadrate; prp, paroccipital process; sr, supraorbital rim; stf, supratemporal fossa. Labels of neurocranial elements are not abbreviated.