Boyer diss 2009 1046..

Table 3.2. Anatomical abbreviations
Cranial bones
Boc – Basioccipital
Bul – Bulla forming bone
De – Dentary
Eoc – Exoccipital
Ect – Ectotympanic
Fr – Frontal
Lc – Lacrimal
Mx – Maxilla
Ns – Nasal
Pa – Parietal
Pal – Palatine
Pmx – Premaxilla
Ptr – Petrosal
Soc – Supraoccipital
Sq – Squamosal
Zy – Zygomatic
Miscellaneous osteological feature
av – aperture for vestibular fenestra
ac – aperture for cochlear fenestra
bs – bullar suture (?)
cc – cochlear canaliculus: Visible as the most posterior "septum" on medial aspect of
promontorium. Houses a canal that connects the spiral cochlea to endocranial
space (see MacPhee, 1981). HRxCT data was used in most cases to evaluate the
presence of this feature.
ec – epitympanic crest
eam – external auditory meatus
g1 – a groove with a lateral route that likely holds the internal carotid plexus and
possibly a remnant of the internal carotid artery
g2 – a groove with a slightly more medial route that may hold internal carotid plexus
fibers that approach the s1
g3 – a groove that leads to the s2, which likely contains contributions from the
tympanic plexus, but is probably mainly responsible for transmitting a small vein
(MacPhee, 1981)
g4 – a frequently present alternative or additional groove for tympanic plexus fibers to
reach routes 1-3
g5 – frequently present groove that leads from a point ventral to the fenestra vestibuli
dorsolaterally, toward the epitympanic crest
ica – internal carotid artery
icp – internal carotid (neurovascular) plexus
pcf – posterior carotid foramen
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