wrinkled enamel surface and between 12 and 15 flutes on each side. Possible material Teeth The first Sebayashi Formation specimen (GMNH-PV-999) is an isolated tooth crown with a partially intact root. It is not known in which jaw the tooth was positioned or which surface faced the inside or outside of the mouth. The tooth's front and back carinae are well-defined, though the former is not well-preserved. Besides having a broader, wide base and being slightly smaller at in length, GMNH-PV-999 has a very similar morphology to the S. suteethorni holotype. Features shared between the two specimens include: a straight and only slightly compressed shape; a somewhat oval cross-section; no serrations on the carinae (possibly due to bad preservation); and flutes on the crown surface, the Japanese specimen having 12 on each side. The teeth also share a crown surface with numerous small granular structures oriented parallel to their lengths. Because of these resemblances, Hasegawa and colleagues regarded GMNH-PV-999 as nearly identical to the S. suteethorni holotype tooth. The blood grooves (tiny furrows in the gaps between each denticle) of GMNH-PV-999 have an oblique orientation of 45 degrees, as in Baryonyx and KDC-PV-0003, the second Sebayashi formation tooth, which consists of a slightly recurved crown fragment with an almost circular cross-section. It has better preservation of small details than the former specimens, such as visible, though poorly defined serrations, with two to three denticles per mm (0.039 in). Like GMNH-PV-999, it has a granular texture and at least 12 flutes on its surface, not all of which stretch to the crown's full length. Out of the four teeth attributed to "S." fusuiensis, specimen IVPP V 4793 is the most intact, although still somewhat deformed. The crown, which is missing its tip, is long and wide at the base. The tooth is straight, only slightly recurved, and has an oval cross-section. The front and rear carinae are distinct, though their serrations have been heavily eroded, similar to those of KDC-PV-0003. Like the Thai and Japanese teeth, the "S." fusuiensis specimens bear developed flutes and a granular surface. As in both Sebayashi Formation teeth, there are 12 flutes on each face of the "S." fusuiensis teeth. Like in KDC-PV-0003, these flutes vary in length. Buffetaut and colleagues found the "S." fusuiensis teeth most similar to those of Siamosaurus, given their identical crown shape, fluting, and granular enamel. Postcrania Though no skeletal elements