Macrodontophion

Macrodontophion (meaning "long-toothed snake") is the name given to a dubious genus of lophotrocozoan from the Early Devonian Dniester Series of Ukraine. It was described by Adalbert Zborzewsky in 1834, but was never given a species epithet, and is considered a "nomen dubium", because it is based on a single tooth.
Taxonomy.
"Macrodontophion" was originally believed to have been a theropod by Zborzewsky in 1834. Since "Megalosaurus" was mentioned in the same paragraph that the genus name "Macrodontophion" first appears, many palaeontologists, such as Romer in 1956, Steel in 1970 and Romer again in 1976, believed that "Macrodontophion" was a megalosaur. According to Weishampel (1990), "Macrodontophion" is a basal theropod. Zborzewski (1990) tentatively referred "Macrodontophion" to the Jurassic. Lev Nessov suggested the age of the tooth was Early Devonian, belonging to the Dniester Series, of which is rich in "Porolepis" teeth, but this could not be completely confirmed at the time. "Macrodontophion". Olshevsky (2000) noted that the holotype tooth of "Macrodontophion" is similar to those of a crocodile or a plesiosaur. Dumbrava and Blieck (2005) and Voichyshyn (2006) confidently referred "Macrodontophion" to the Early Devonian Dneister Series. They also confirmed that it was a lophotrochozoan.