maarius Smith, 2009 Genus-level: Species-level: Geiseltaliellus is an extinct genus of iguanian lizards that lived in what is now western Europe during the Eocene.

German paleontologist Oskar Kuhn named the genus in 1944 after the Geiseltal valley where the first specimens were found, designating the type species Geiseltaliellus longicaudus.

Geiseltaliellus likely did not have this ability because it lacked the enlarged scales on the undersides of the feet of Basiliscus, which give it greater surface area.

However, the closest relatives of Geiseltaliellus all come from North America, suggesting that the genus had its origins in the New World and became an evolutionary "dead end" once it radiated into Europe.

[1] G. maarius was included in a phylogenetic analysis of living and extinct iguanians in 2009, which found it to be a member of Corytophanidae.