Although probably an Anglicism, in Spanish it has been used as relative to the Silurian (geological era), as a variant of "Silurian".
It is a term used in Geology. It corresponds to the third geological period of the Paleozoic era. It is also known as siluric. It occurred after the Ordovician and preceded the Devonuchus.
SILURIO error by SILURO, Freshwater fish that inhabits the great rivers of Central Europe. It is the largest peace and can weigh up to 100 kilos.