Lithostrotia

Lithostrotia

Lithostrotia is a clade of inferred titanosaursauropods that lived amid the Early Cretaceous and Late Cretaceous. The gathering was characterized by Unchurch et al. in 2004 as the latest regular progenitor of Malawisaurus and Saltasaurus and every one of the relatives of that predecessor. Lithostrotia is gotten from the Ancient Greek lithostros, signifying "trimmed with stones", alluding to the way that numerous known lithostrotians are safeguarded with osteoderms. Be that as it may, osteoderms are not a recognizing highlight of the gathering, as the two noted by Unchurch et al. incorporate caudal vertebrae with emphatically inward front appearances (procoely), despite the fact that the most remote vertebrae are not procoelous.

Definition and synapomorphies:

Upchurch and associates (2004) characterize the Lithostrotia as a hub based taxon that incorporates the last basic precursor of Malawisaurus and Saltasaurus and all relatives of that progenitor. As indicated by this definition the Lithostrotia incorporates all structures that are more inferred than Malawisaurus in phylogenies.

Notwithstanding characterizing the gathering Upchurch and associates gave two basic inferred highlights (synapomorphies), which serve to recognize the gathering from non-individuals. The first is that every single caudal vertebra separated from the most distant distal were procoelous, which means their front face was sunken. Likewise, the front (proximal) caudal vertebrae were especially solid procoelous. This first component is likewise imparted to Mamenchisauridae.

Unchurch et al. named Lithostrotia in light of the nearness of osteoderms in numerous individuals, however the eponymous osteoderms don't speak to synapomorphy, as the developmental history of osteoderms is obscure inside the titanosaurs. It might be this quality has built up numerous circumstances freely inside the titanosaurs and Lithostrotia, as osteoderms are known in numerous saltasaurids, Mendozasaurus, Aeolosaurus, Ampelosaurus and different other genera both inside and outside Lithostrotia with various morphologies.

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