Table 1.

Comparison of some unusual features of Thililua longicollis and Manemergus anguirostris.

anatomical feature	Thililua longicollis	Manemergus anguirostris
paired frontal foramina	yes	yes
absence of a pineal foramen	yes	probably yes (the pineal foramen reported in Buchy et al. [25] is probably a fontanelle)
jugal foramina	yes	probably no
reniform orbit	yes	probably yes
carinated tooth crown	yes	yes
expanded premaxilla excluding the frontal from the external naris	yes	no
high temporal bar	yes	yes (even higher)
fontanelle	no	yesa
squamosal bulb	absent	present
estimated maxillary tooth count	22	9–10a
mesialmost premaxillary teeth contact each other mesially	yes	possibly yes
strongly reduced first premaxillary alveolus	yes	no
cervical centra	30	25
lateral ridge on cervical centra	yes	no

^aConditions probably resulting from osteological immaturity.