Figure 3 in Cranial osteology and palaeobiology of the Early Cretaceous bird Jeholornis prima (Aves: Jeholornithiformes)

Figure 3. Three-dimensional snapshots of lateral and dorsal cranial elements of Jeholornis STM 3-8: dorsal lateral (A) and ventromedial (B) views of the left nasal; dorsal views of the right (C) and left (D) preorbital ossification; lateral (E) and medial (F) views of the left quadratojugal; lateral (G) and medial (H) views of the left jugal; lateral (I), laterocaudal (J) and medial (K) views of the left postorbital; lateral (L) and medial (M) views of the right squamosal. Scale bar: 5 mm. Arrows indicate the rostral direction. Labels for articular facets are in red. Dashed lines indicate broken margins. Abbreviations: a.m, maxilla articulation; a.po, postorbital articulation; a.q, quadrate articulation; a.qj, quadratojugal articulation; a.s, squamosal articulation; fpo, frontal process of postorbital; jpo, jugal process of postorbital; jpq, jugal process of quadratojugal; mpj, maxillary process of jugal; mpn, maxillary process of nasal; ocj, oval concavity of jugal; poj, postorbital process of jugal; pos, postorbital process of squamosal; ppn, premaxillary process of nasal; qjp, quadratojugal process of jugal; qjs, quadratojugal process of squamosal; spo, squamosal process of postorbital; spq, squamosal process of quadratojugal.