Fig. 8 in A Systematic Review Of Sulawesi Bunomys (Muridae, Murinae) With The Description Of Two New Species

Fig. 8. Lateral (top) and ventral (bottom) cranial views of Bunomys chrysocomus (AMNH 224124) identifying osseous and foraminal landmarks discussed in the text. Abbreviations: af, anterior alar fissure; al, alisphenoid; bo, basioccipital; bp, bony palate; bs, basisphenoid; eb, ectotmpanic (auditory) bulla; eo, exoccipital; et, very short bony eustachian tube; fo, foramen ovale; hp, hamular process; if, one of the paired incisive foramina; ig, groove for the infraorbital branch of the stapedial artery; la, lacrimal; lr, lamboidal ridge; ms, mastoid portion of the petromastoid; mf, mesopterygoid fossa; mlf, middle lacerate foramen; mx, maxillary; nc, nasolacrimal capsule; nf, nasolacrimal foramen; nt, nasal tips overhang the projecting premaxillaries to form a short tube anterior to the incisor faces; oc, occipital condyle; pa, parietal; pc, posterior opening of the alisphenoid canal (the infraorbital branch of the stapedial artery enters the braincase—where the arrow points—dorsal to the pterygoid plate); pf, pterygoid fossa, the site of muscle attachment on the pterygoid plate; pgf, postglenoid foramen; pp, pterygoid plate; ppf, left posterior palatine foramen; ppx, projection of the premaxillary beyond anterior faces of the upper incisors; pr, pterygoid ridge; ps, presphenoid; pt, periotic; px, premaxillary; spv, one of the paired sphenopalatine vacuities; sq, squamosal; sv, spenopterygoid foramen; vmr, ventral maxillary root of the zygomatic arch; vpa, ventral extension of the parietal to form the braincase wall above the squamosal root of the zygomatic arch; vpf, ventral postalar fissure, which is confluent dorsally with the postglenoid foramen, and ventrally with the middle lacerate foramen; zn, zygomatic notch; zp, zygomatic plate.