Classification
Numerous species have been historically assigned to Titanosaurus, from southern Europe to South America. However, most of these are either classified in different genera today or are considered invalid or dubious. The most well-known species of Titanosaurus, "Titanosaurus" colberti, has been renamed Isisaurus. Other species, such as T. blanfordi (Lydekker, 1879), are based on fragmentary remains which cannot be meaningfully compared to other species and are now considered nomina dubia.
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