1843 in paleontology

Pterosaurs

• Edward Newman interpreted pterosaurs as mammals in a similar fashion to Soemmering. However, Newman specifically considered pterosaurs to be carnivorous flying marsupials.

Sharks

• Louis Agassiz named a new taxon, Otodus and renamed Lamna obliqua as new Otodus species, the O. obliquus.
• Louis Agassiz named and renamed species, such as the Oxyrhina xiphodon, Oxyrhina hastalis, a new species of White Shark, the Carcharodon subauriculatus was named also.