The total number of branchiostegals
remains unknown. Each branchiostegal is
plate-like and ornamented with a central shallow
dome and concentric ridges. Anterior to the series
of branchiostegals there is a single gular plate,
which is very small, shorter than broad, with an
almost straight posterior border (Figure 9). It is also
ornamented with concentric ridges and it is transversally
traversed by the mandibular sensory
canals. The mandibular sensory canal from one
side enters the gular plate from the dentary, runs
into a gular commissure, and exits to the dentary
on the other side (MPEF-PV 3598).
Among the elements of the hyoid arch, only
the hyomandibula is visible. Like in †Birgeria, the