Shallow-water late middle Eocene crinoids from Tierra del Fuego: a new southern record of a retrograde community structure
One of the very few crinoid records in Patagonia is that of the Stainless Steel Tumbler With Handle abundant columnals of the genus Isselicrinus found in several localities in shallow marine, glauconitic sandstones of the Leticia Formation (upper middle Eocene of Tierra del Fuego Island).Some of them, up to 10 cm long, are preserved in a position a