|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Reptilia - Sauropterygia - Pliosauridae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|V. Fischer et al. 2015||Pliosaurid plesiosaur characterized by the following autapomorphic features: serrated carinae in which the heights of the denticles are greater than their widths and vary in an undulose (i.e. wave-like) fashion across the apicobasal length of the carina; clustering of the mesial alveoli of the dentary into pairs.
Makhaira rossica is also characterized by the following combination of features: procumbent 1st
alveolus in premaxilla; 1st alveolus is placed directly anterior to the 2nd alveolus (both shared with a distinct new taxon from the Hauterivian of Russia; V.F., pers. obs.); long symphysis including more than 10 alveoli (unlike in Simolestes vorax, Liopleurodon ferox, Pliosaurus rossicus, Pliosaurus macromerus, Pliosaurus patagonicus, Megacephalosaurus eulerti, Brachauchenius lucasi, Kronosaurus queenslandicus) absence of symphysial ventral keel (as in Brachauchenius lucasi, Marmornectes candrewi and rare instances in the Late Jurassic), streamlined rostrumwith no lateral expansion (as in Hauffiosaurus spp., Marmornectes candrewi and brachauchenines), trihedral teeth (as in Pliosaurus spp. except P. kevani and P. andrewsi), low neural arch (unlike in Brachauchenius lucasi).