Boyer diss 2009 1046..

uccolingually, measuring 1.90 mm in mesiodistal length and 1.49 mm in buccolingual
width.
Lacrimal.—The dorsal half of the right lacrimal is preserved (Fig. 2.1). Remnants
of the left element are difficult to discern, if present. The frontal (Fig. 2.1B, C: 5) and
part of the maxillary suture (Fig. 2.1B, C: 6) of the right lacrimal are visible. The
anterior margin is damaged such that the presence of a tubercle cannot be evaluated. The
lacrimal contributed extensively to the orbital mosaic (Fig. 2.1B, C: 7). It also formed
the anteromedial part of the orbital rim. The lacrimal does not, however, appear to have
extended outside of the orbit substantially: there was not a large facial process. The right
lacrimal foramen (Fig. 2.1B, C: 8) is quite large (~ 1.53 mm x 1.61 mm), appears to be
located on the orbital rim and faces dorsolateroposteriorly (Fig. 2.1).
Maxilla and Maxillary Dentition.—The right and left maxillae are preserved with
C, P 2-4 , M 1-3 on the right and left (Figs. 2.2, 3), although only C-P 4 are visible with the
naked eye. The rostral parts of these bones are well preserved (Figs. 2.2, 3) but the
orbital part is obliterated and the contribution of the maxillae to the orbital mosaic is
unknowable (Figs. 2.2, 3).
The maxillae have been rotated medially through deformation so that the left and
right tooth rows are at right angles to one another (Figs. 2.2, 3). Upper canines,
premolars and molars have never before been described for Pronothodectes gaoi.
Although it is not possible to give a very detailed description of P 4 –M 3 , their gross
dimensions can be provided, as the teeth were extracted from the HRxCT image of the
specimen (Fig. 2.2C).
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