Skull I' Neurocranium II' Viscerocranium

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SkullI. NeurocraniumII. Viscerocranium
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I. Neurocranium

• Fossa cranii caudalis
• Tentorium cerebelli osseum
• Fossa cranii medii
• Crista orbitosphenoidalis
• Fossa cranii rostralis

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Fossa cranii caudalisinner (cerebellar) surface

• ventrally
• Impressio medullaris sagittal
• medulla oblongata (brain - spinal cord)
• Impressio pontina transverse
• pons bridge
• dorsally
• Impressio vermialis - sagittal
• cerebellar vermis
• tentorium cerebelli osseum

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Fossa cranii media

• med. ? lat.
• fossa hypophysealis (sella turcica)
• sulcus nervi ophthalmici (med.)
• sulcus nervi maxillaris (lat.)
• spina ossis sphenoidalis
• fossa piriformis
• impressiones digitatae (imp. gyrorum)
• rostr., median
• sulcus chiasmatis (sulcus nervi optici)

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Fossa cranii rostralis

• caud. crista orbitosphenoidalis
• rostr. lamina cribrosa / nasal cavity
• 2x fossa ethmoidalis (olfactory bulb), for.
  ethmoidale
• impressiones digitatae (imp. gyrorum)
• rostrum (ossis sphen.), crista galli, crista
  sagittalis interna

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dors. ? ventr.
Ru Sus For. orbitorotundum Eq For. alare
parvum dorsally Ca 2x For. ethmoidale
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• Os temporale squama ossis temporale os
  petrosum
• Os petrosum pars tympanica
• pars petrosa
• pars mastoidea
• proc. muscularis (thin, needle-like)
• proc. styloideus (for the hyoide bone)
• (not in Ca, Sus)

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• orientation on petrosal bone
• lat. porus acusticus externus
• pars mastoidea situated laterally
• rostroventrally directed
• proc. muscularis
• proc. styloideus

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os petrosum, med. aspect

• porus acusticus internus ? meatus ? fundus (4
  openings)
• rostrodors. area n. facialis (introitus canalis
  n. VII.)
• rostroventr. area cochleae
• caudodors. for. vestibulare dors.
• caudoventr. for. vestibulare ventr.
• caud., dors. apertura externa aquaeductus
  vestibuli
• caud. ventr. apertura externa canaliculi
  cochleae
• rostr., dors. fovea ganglii semilunaris
• fov. ganglii nervi trigemini

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skull, ventral surface

• for. magnum
• for. nervi hypoglossi
• for. jugulare ( for. lacerum aborale)
• Eq. for. lacerum (orale)
• med. incisura carotica (lat. med.?)
• inc. ovale
• lat. inc. spinosa
• for. alare caudale
• for. retroarticulare
• for. stylomastoideum

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II. Viscerocranium

• meatus nasi dors. ? lamina cribrosa (? olfactory
  bulb)
• meatus nasi medius ? sinus paranasales (eq 1
  system)
• meatus nasi ventr. ? pharynx (? larynx ? trachea)
• meatus nasi communis (next to septum nasi)
• Orbit
• fossa sacci lacrimalis (rostr. ? nasal cavity)
• fossa glandulae lacrimalis (lat., but within
  the orbit)
• fossa musculi obliqui ventr. (medioventr.)
• fovea trochlearis (mediodors., for m. obliquus
  dors.)
• Ca, Sus ligamentum orbitale

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• Arcus zygomaticus
• Os temporale, proc. zygomaticus
• Os zygomaticum, proc. temporale
• Os frontale, proc. zygomaticus
• Ca, Sus Lig. orbitale

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fossa pterygopalatina
caud. ? rostr.
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palatum durum (hard palate)

• os palatinum, lamina horizontalis
• maxilla, proc. palatinus
• os incisivum, proc. palatinus
• margo interalveolaris ( diastema)
• septa interaleveolaria
• septa intraalveolaria ( interradicularia)
• rostr. foramen interincisiva (Ca, Eq)
• fissura interincisiva (Ru, Sus)

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Mandibula

• lat. fossa masseterica, rostr. for. mentale
• med. fossa pterygoidea, caud. for. mandibulae
• facies lingualis / fac. labialis fac. buccalis
• interspec. diff.
• margo ventr. shape
• angulus mandibulae
• Eq tuberositas musculi sternomandibularis
• Ca proc. angularis (caudovetr.)