The flat articulations also distinguish these caudal vertebrae from the procoelous
middle caudal vertebrae of lithostrotian titanosaurs (e.g., Powell, 1992; Salgado et al., 1997; Sanz et al., 1999; Gomani, 2005).
ASHER & KRAUSE (1998) based the presence of a pelobatid in Madagascar on a single isolated atlas that resembled Pelobatidae in the combination of having solid, procoelous
centrum, lacking nothochordal canal and transverse processes, having atlantal cotyles nearly in touch ventrally, and being unfused with the second presacral vertebra.
At least procoelous
vertebrae belong to eusuchians.
The caudal vertebra from MMA (without number) is procoelous
, and it may be the first of the tail (KARL, 1990, 1991b).