Bergisuchus is known from a holotype rostrum from the Messel Pit, first described in 1966, and a mandible from an open-pit coal mine near Halle in the state of Saxony-Anhalt.
The fossil record of this species is fragmentary; remains in Cernay, France, include a mandible, a complete radius, and fragments of a humerus.
Ramus of mandible forms a less steep angle with body of mandible
Little is known about the species, because it was identified with only a lower jaw and limb bones, recovered from a site near Mananjary on the east coast of Madagascar.
Based on the details of the mandibular musculature and articulation, the amphi-American Himantura are hypothesized to be most closely related to the river stingrays in the family Potamotrygonidae, rather than to Indo-Pacific Himantura species.
Pappocetus differs from all other known protocetid genera by the step-like notch on the ventral margin of the mandible below M2 and M3; from Indocetus and Rodhocetus by the deciduous double-rooted P1; from Protocetus and Babiacetus by the presence of accessory cuspules; and from Babiacetus by the unfused symphysis terminating just before P3.
The symptoms are necrosis of the mandible (lower jawbone) and the maxilla (upper jaw) as well as constant bleeding of the gums and (usually) after some time, severe distortion due to bone tumours and porosity of the lower jaw.
The type species, Rhamphinion jenkinsi, was described and named in 1984 by Kevin Padian, based on holotype MNA V 4500, a partial skull including the occipital region, a partial left jugal, a fragment of the lower jaw including two preserved teeth and the impression of a third, and one other fragment that could not be identified.
Incisors are described as needle-like and mandibles as delicate (Nowak, 1999; Balete et al., 2007).
It is known from the holotype BP/1/3512, a partial skull lacking the snout and anterior third of the mandible.
Zarafasaura is known from the holotype OCP-DEK/GE 315, an articulated incomplete dorsoventrally crushed skull and mandible and from the paratype OCP-DEK/GE 456, a complete mandible.