María José Salas, Jean Vannier, Mark Williams, Early Ordovician Ostracods from Argentina: Their Bearing on the Origin of Binodicope and Palaeocope Clades, Journal of Paleontology, Vol. 81, No. 6 (Nov.

Exceptionally Preserved 450-Million-Year-Old Ordovician Ostracods with Brood Care. Current Biology, 13 March 2014 DOI: 10.1016/j.cub.2014.02.040 ...

Ordovician reefs were also home to large sea lilies, relatives of sea stars. Anchored to the bottom inside calcareous tubes, they collected food particles with feathery arms that waved in the ...

Lower Ordovician (Ibexian) shell beds are primarily trilobite- and echinoderm-dominated and are taphonomically similar to Cambrian shell beds. In contrast, brachiopod, ostracod, and gastropod shell ...

The oldest known animal sperm sample has been discovered, dating back 100 million years. Dozens of ostracods were found in a piece of amber with their “soft parts” out, and their giant sperm ...

If you were to look up from Earth some 466 million years ago, you might have seen a gleaming ring stretching across the sky, some scientists say. A study published this month links an uptick in ...

More information: Zhutong Zhang et al, Tempo of the Late Ordovician mass extinction controlled by the rate of climate change, Science Advances (2025). DOI: 10.1126/sciadv.adv6788 ...

High potential for weathering and climate effects of non-vascular vegetation in the Late Ordovician. Nature Communications, 2016; 7: 12113 DOI: 10.1038/ncomms12113 ...

During the Ordovician, life was literally great. Multicellular plants and animals diversified and moved into ecological niches throughout the globe. This is probably what it was like on a typical ...

Toward the end of the Ordovician, Earth underwent widespread glaciation. That could have caused the shallow seas to disappear, which provided optimal conditions for a variety of organisms. But ...