Monopteros (fish)

Monopteros
Temporal range:
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Osteoglossiformes
Family: Osteoglossidae
Subfamily: Phareodontinae
Genus: Monopteros
Volta, 1796
Species:
M. gigas
Binomial name
Monopteros gigas
Volta, 1796

Monopteros is an extinct genus of marine bonytongue fish known from the Eocene. It contains a single species, M. gigas, known from the Early Eocene of Monte Bolca, Italy. Its genus name, Monopteros meaning "one wing", comes from its large, elongated pectoral fins. The species name, gigas, refers to its relatively large size at 448 millimetres (1.470 ft) in length.

It is thought to be a member of the extinct subfamily Phareodontinae, or at least closely related to it. Some earlier authorities erroneously placed it as a species of the late-surviving crossognathiform Platinx, which it co-occurred with.