TABLE 1. Measurements in mm of the skull, cf. Miobalaenoptera numataensis (YPM 11851). Measurements are rounded to the nearest 0.5 mm.
| mm | |
| Total length as preserved | 516.0 |
| Breadth across exoccipitals | 620.0 |
| Maximum width as preserved | 807.0 |
| Length of supraoccipital | 516.0 |
| Foramen magnum width | 79.0 |
| Foramen magnum height | 91.0 |
| Maximum width of occpital condyles | 174.0 |
TABLE 2. Measurements in mm of the periotic, cf. Miobalaenoptera numataensis (YPM 11851). Measurements are rounded to the nearest 0.5 mm.
| mm | |
| length of anterior process, from anteroventral angle to anterior incisure | 46.0 |
| length of pars cochlearis, from anterior incisure to posterior margin around the aperture for the cochlear aqueduct of pars cochlearis | 50.0 |
| posterior process mediolateral width | 190.5 |
| maximum anteroposterior length of posterior process | 52.0 |
TABLE 3. Morphological differences between Miobalaenoptera numataensis (NFL 18) and cf. M. numataensis (YPM 11851).
| YPM 11851 Referred |
NFL 18 Holotype |
|
| basioccipital crest | dorsoventrally deeper | shallower |
| area between basioccipital crests | narrower | wider |
| ventral surface of anteromedial portion of squamosal | excavated | flat |
| anterior process | dorsoventrally deeper | shallower |
| shape of the anterior process | wider | narrower |
| lateral tuberosity location | more posterior | anterior |
| anteroexternal sulcus | more posterior | anterior |
| pars cochlearis | dorsoventrally thicker | thinner |
| medial margin of pars cochlearis in ventral view | sigmoidal | straight |
