Godfrey et al.—New specimen of Agorophius pygmaeus (Odontoceti, Cetacea)


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Figure 7. Partial right periotic of Agorophius pygmaeus. SC 2015.51.1c: (1) ventral view; (2) medial view; (3) dorsomedial view; (4) dorsal view. Scale bar represents 10mm.


which experienced much postmortem distortion. The larger portion includes most of the cerebral cranium, forward to the frontomaxillary suture and in situ periotics (the bullae were not preserved). The smaller piece preserves the median and left supraorbital/facial region back to the frontomaxillary suture and forward to the level of the premaxillary foramen; most of the rostrum was not preserved. There is no doubt that this skull derives from an odontocete; the maxillae and premaxillae telescope back over the supraorbital process of the frontal, a unique feature of odontocetes. The skull appears nearly symmetrical in dorsal view


(Fig. 3), except that the point of the apex of the supraoccipital wedge on the flattened (i.e., tabular) dorsal side of the parietals lies to the left of the midline of the skull. Measurements of the


skull are illustrated in Supplemental Material Figure 2. The skull is approximately 206mm wide across the zygomatic processes of the squamosals (an estimate because the left zygomatic process of the squamosal was not preserved), and it is 124mm deep from the top of the parietal-supraoccipital suture down through the basioccipital hamuli; the skull is nearly twice as wide as deep. The width across the lambdoidal ridges above the occipital condyle approximates the aforementioned depth of the skull. The tabular intertemporal constriction is short, about as long as it is wide (minimum width equals 54mm), and 83mm deep. The skull is approximately 156mm wide across the supraorbital processes of the frontals. At this same location, the skull is 92mm deep as measured from the top of the left premaxilla vertically down through the palatine. At the level of


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