TABLE 1. Skull measures in mm. No data (-), maximum preserved (*), approximate measure (~).
| Tlaxcallicetus sp. | Tlaxcallicetus guaycurae | |
|
Cranium |
||
| Anteroposterior length | *200 | *270 |
| Greatest anteroposterior length the exoccipital | - | 91.6 |
| Anteroposterior length of the zygomatic process of the squamosal | - | *150 |
| Byzigomatic width | - | ~750 |
| Greatest transverse width of the supraoccipital | - | ~370 |
| Transverse width of exoccipitals | - | ~248 |
| Greatest Transverse width of occipital condyles | ~125 | 126 |
| Height of foramen magnum | 45 | 40.2 |
| Transverse width of foramen magnum | ~47 | ~35.2 |
| Width of upper intercondyloid notch | ~49.72 | 43.1 |
| Width of low intercondyloid notch | ~26.1 | 21 |
| Transverse width of basioccipital crest, at its middle lenght | 26.68 | 34.9 |
| Transverse width across basioccipital crest | ~64.2 | ~90.3 |
| Diameter of glenoid fossa (anterolateral-posteromedial axis) | - | 139.5 |
| Diameter of glenoid fossa (posterolateral-anteromedial axis) | - | 118.6 |
TABLE 2. Measurements in mm of ear bones. No data (-), maximum preserved (*), approximate measure (~), not clear (?).
| Tlaxcallicetus sp. | Tlaxcallicetus guaycurae | |
|
Left bulla |
||
| Anteroposterior length | *54.3 | - |
| Greatest transverse width | 44.7 | - |
| Dorsoventral depth of involucrum, at anterior level to inner posterior pedicle | 27.8 | - |
| Transversal thickness of involucrum across the anterior point of the base of the inner posterior pedicle | 28 | - |
| Anteroposterior length of the tympanic cavity | *42.4 | - |
| Greatest transverse width of inner posterior prominence/medial lobe | ~22.9 | - |
| Greatest transverse width of outer posterior prominence/lateral lobe | ~20 | - |
|
Left periotic |
||
| Greatest anteroposterior length | *54 | ~76.42 |
| Anteroposterior length of the suprameatal area | 7.2 | - |
| Greatest anteroposterior length of anterior process, from anterior incisures to anterior keel | 22.78 | ~20.7 |
| Greatest length of the posterior process | - | ~60.8 |
| Maximum anteroposterior length of pars cochlearis | *28.74 | ~29.36 |
| Greatest length of internal acoustic meatus | 16.2 | - |
| Greatest length of aperture for the cochlear aqueduct | ~3.5 | ~2.5 |
| Greatest length of aperture for the vestibular aqueduct | 7.68 | - |
| Greatest length of proximal opening of the facial canal | ~4 | - |
| Greatest length of dorsal vestibular area | 8.2 | - |
| Greatest length of fenestra rotunda | - | ~2.4 |
| Greatest length of fenestra ovalis | - | - |
| Greatest length of mallear fossa | - | ? |
| Greatest length of distal opening of the facial canal | - | 6.4 |
| Greatest length of stapedial muscle fossa | - | ? |
| Transverse width of base of anterior process | - | 10.5 |
| Transverse width of pars cochlearis | 17 | ? |
| Transverse width of the posterior process (anteroposterior plan) | - | 17 |
| Maximum transverse width of suprameatal area | 10 | - |
| Maximum transverse width of periotic, from the medial face of pars cochlearis to lateral wall of the periotic body | ~30.9 | ? |
| Dorsoventral depth of anterior process | *55 | *41.3 |
TABLE 3. Measurements in mm of left thyrohyoid bone. No data (-).
| Tlaxcallicetus sp. | Tlaxcallicetus guaycurae | |
| Length | 73 | - |
| Width at middle | 26.4 | - |
| Thickness at middle | 22.7 | - |
