Biology Reference
In-Depth Information
Table 1. Morphometric skull variables analyzed in
Inia
. VN = variable number.
VN Morphometric Measurements
1.
Condylobasal length
2.
Length of rostrum
3.
Width of rostrum at base
4.
Width of rostrum 60 mm anterior to line across hindmost limits of antorbital notches
5.
Width of rostrum at mid length
6.
Width of premaxillaries at mid length of rostrum
7.
Width of rostrum at ¾ of this length
8.
Premaxilla width at ¾ of this length
9.
Distance from tip of rostrum to external nares
10.
Distance from tip of rostrum to internal nares
11.
Greater preorbital width
12.
Greatest postorbital width
13.
Least suproaorbital width
14.
Greatest width of external nares
15.
Greatest width between zygomatic processes of squamous bones
16.
Greatest width of premaxillaries
17.
Greatest width of maxillaries
18.
Greatest parietal width within post temporal fossae measured in the suture of the bone
19.
Vertical external height of braincase with supraoccipital crest
20.
Vertical external height of braincase without supraoccipital crest
21.
Internal length of braincase
22.
Greatest length of left post temporal fossa from post orbital bone
23.
Greatest length of left post temporal fossa from zygomatic extremity
24.
Greatest width of left temporal fossa at right angles to greatest length
25.
Major diameter of left temporal fossa proper
26.
Minor diameter of left temporal fossa proper
27.
Length of left orbit from apex of preorbital process of frontal to apex of post orbital process
28.
Length from edge of lacrimal to end of post orbital
29.
Length of antorbital process of left lacrimal
30.
Greatest width of internal nares
31.
Width of supraoccipital area
32.
Width of braincase across parietals
33.
Length of upper left tooth row
34.
Length of lower left tooth row
35.
Greatest length of left ramus
36.
Greatest height of left ramus
37.
Length of left mandibular fossa
38.
Length of mandibular symphysis
39.
Height of foramen magnum
40.
Width of foramen magnum
41.
Left condyle length
42.
Left condyle width
43.
Number of teeth-upper left
44.
Number of teeth-upper right
45.
Number of teeth- lower left
46.
Number of teeth-lower right
47.
Number of non-conical teeth-upper left
48.
Number of non-conical teeth-upper right
49.
Number of non-conical teeth-lower left
50.
Number of non-conical teeth-lower right
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