Gengasaurus

Gengasaurus is an extinct genus of ophthalmosaurid ichthyosaur from the Jurassic. The type and only species, Gengasaurus nicosiai, was named in 2017, after the locality of Genga, Marche. It lived in Italy about 152 million years ago and it was around long when fully grown.
The near complete holotype was discovered in 1976 in the Late Jurassic (Tithonian) Calcari ad aptici e Saccocoma Formation at Camponocecchio. It lay undescribed for nearly two decades before it was described in 2016 - this paper was eventually published in 2017. The holotype is now housed at the Spaelaeo-Palaeontologic Museum in Genga.