This contribution presents the first description of crinoids from western margin of Parnaiba Basin. It also presents their first description in the Pimenteira Formation (Devonian of the Parnaiba Basin ...

Two recently collected specimens of Bogotacrinus scheibei Schmidt, 1937, from the Devonian (Emsian-Eifelian) Floresta Formation of Colombia reveal that Bogotacrinus is a dicyclic camerate crinoid ...

"This is a contribution to the IGCP 499 project on 'Devonian land-sea interaction : evolution of ecosystems and climate'"--P. [4] of cover. Devonian change : case studies in palaeogeography and ...

In modern ecology, the removal or addition of a predator to an ecosystem can produce dramatic changes in the population of prey species. For the first time, scientists have observed the same dynamics ...

A new discovery suggests why one relationship evolved in appearance and how one parasite turned more aggressive but also protective toward its host over millions of years. Finding parasites on fossils ...

Finding parasites on fossils is a rarity, since, as we humans have experienced with a shudder, they tend to attach to skin or soft tissue and not skeleton. However, a discovery led by the University ...