Cranium
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Middle Ear
1
stapes obturator
foramen ; 0 large 1 small-abs,
2 petrosal-squamosal
joint ; 0 flat 1
ball-socket 2 minimal contact 3 tubular,
3 squamosal external auditory
meatus (EAM)
; 0 no approximation ventral EAM 1
squamosal ventral EAM,
4 fenestra cochleae ; 0
present 1
absent,
5 fenestra cochleae
orientation ; 0 posterolat 1
posterior,
6 jugular
foramen ; 0 similar fenestr
coch 1 larger fenestr coch,
7 crista
interfenestralis ; 0 abs 1 pres,
8 width basal
cochlea ; 0 <20%
basicran width 1 >20% basicran width,
9 anterior
promontory ; 0 anteriorly smooth
1 projects,
10 petrosal
canals ; 0 absent 1 present,
11
transpromontorial sulcus ; 0 pres 1 abs,
12
stapedial sulcus ; 0 pres 1 abs,
13 piriform
fenestra ; 0 absent 1 present,
14 petrosal
pachyostosis ; 0 light 1
dense,
15 tegmen tympani
pneumatization ; 0 laminar 1 air cells,
16 mastoid
pneumatization ; 0 laminar 1 air cells,
17 tegmen tympani process
; 0
flat 1 projects,
18 epitympanic recess
; 0 continuous middle ear 1 separate,
19
basisphenoid bulla ; 0 reduced 1 present,
20 alisphenoid
bulla ; 0 reduced 1 present,
21
basioccipital bulla ; 0 absent 1
shields bulla medially,
22 caudal
tympanic process petrosal; 0
reduced 1 shields posterior bulla,
23 rostral
tympanic process petrosal; 0
reduced 1 present,
24
ectotympanic; 0 phaneric 1 occluded,
25
ectotympanic shape; 0 ringlike 1
expanded,
26 ectotymanic
involucrum; 0 abs 1 pres,
27 external auditory
meatus shape ; 0 ovoid 1
ventral extension,
28 tympanic
annulus ; 0 supports membrane 1
conical ligament,
29
entotympanic ; 0 small-abs 1
present,
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Basicranium
30
mastoid exposure
; 0 exposed 1 occluded,
31 petromastoid exposure
; 0 posterior 1 lateral,
32 foramen ovale ; 0 within
alisph 1 post alisph 2 squamosal,
33 alisphenoid canal
; 0 present 1 absent,
34 alisphenoid canal position ; 0
lateral sphenorbital fissure 1 confluent sphenorbital fissure,
35 maxilla-squamosal connection
; 0 unconnected 1 connected ventral sphenorbital fissure
36 ectopterygoid ; 0
single 1 dual,
37 basisphenoid pit ; 0
absent 1 present,
38 posterior lacerate foramen
; 0 narrow 1 anteroposteriorly elongate,
39 hypoglossal foramen ; 0
abs 1 single 2 multiple,
40 ventral basisphenoid
; 0 exposed 1 covered by vomer 2
covered by pterygoids,
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Braincase
41 petromastoid
exposure in braincase ; 0 exposed
1 excluded,
42 subarcuate fossa ; 0
present 1 flat 2 semicircular canals reduced,
43 dorsum subarcute fossa ; 0
closed 1 open,
44 tentorium cerebelli
; 0 absent 1 divides braincase,
45 sinus canal ; 0
absent 1 present,
46 dorsum sellae ; 0
weak 1 prominent,
47 crista galli
; 0 flat 1 dorsally projects 2 cribriform
plate abs,
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Orbitotemoporal Region
48 foramen
rotundum
; 0 confluent sphenorbital fissure 1 distinct sphenorbital
fissure,
49
alisphenoid spine ; 0 flat 1 anteriorly projects,
50 optic
foramen; 0 absent 1 distinct,
51
optic foramen size ; 0 caliber as V 1 caliber smaller
V,
52
suboptic foramen ; 0 absent-hidden 1 present,
53
interorbital fenestra ; 0 absent 1 connects orbits,
54
ethmoid foramen ; 0 present 1 absent,
55 tuber
maxillaris ; 0 absent 1 dorsal ridge in orbit,
56
Glenoid pos ; 0 even petrosal 1 dorsal petrosal,
57
glenoid shape ; 0 transverse 1 anteroposteriorly
elongate 2 dual,
58
postglenoid foramen ; 0 separate glenoid 1 at glenoid,
59 postglenoid process ; 0 absent 1
present 2 pres-AP,
60
ento-postglenoid processes ; 0 separate 1 connected,
61 entoglenoid process ; 0 no-lat jaw
support 1 post support,
62
zygomatic arch ; 0 complete 1 incomplete 2 squamosal-frontal,
63 jugal in
glenoid ; 0 reaches glenoid 1 reduced anterior to glenoid,
64 anterior
jugal ; 0 anterior edge orbit 1 lateral orbit,
65
zygomatic process squamosal ; 0 robust dorsolaterally 1 narrow
laterally,
66
postorbital bar ; 0 reduced 1 surrounds 90% orbit,
67 postorb
septum ; 0 absent 1 jugal-alisphenoid contact,
68
interorbital distance ; 0 separate 1 convergent,
69
facial lacrimal process ; 0 <= orbital process 1 large
facial process,
70 orbital
lacrimal process ; 0 flat 1 projects into orbit,
71 lacrimal
foramen ; 0 present, 1 not exposed
anterior orbit,
72 lacrimal
foramen opening ; 0 posterior 1 lateral,
73
frontal in orbit ; 0 reduced contact palatine 1 broad contact
palatine,
74 jugal in
medial orbit ; 0 jugal restricted 1 jugal-parietal
contact,
75 maxilla in medial orbit ; 0 reduced 1
extensive,
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Rostrum
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Palate
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