Longest neck of any elasmosaurid, with 72 cervicals; atlas/axis long, low in contrast to short and deep as in L. morgani, T. hannningtoni and Tuarangisaurus keyesi; axis postzygapophysis appears not to extend beyond the face of the centrum as in T.hanningtoni. Prominent pectoral and pelvic bar in adult

Greek, elasma, 'metal plate', Greek, sauros, 'lizard': Plate lizard.