Claraia Clarai
''Claraia'' is an extinct genus of scallop-like bivalve molluscs that lived from the Capitanian stage of the Middle Permian to the Anisian stage of the Middle Triassic, 266-237 million years ago. Fossils have been found worldwide in North America, Europe, Asia, Africa, and Australia. These are common fossils subsequent to the Permian-Triassic boundary, suggesting that the genus experienced rapid diversification during and after the Permian–Triassic extinction event, around 251.9 million years ago, making it a Disaster taxon. Ecology ''Claraia'' may have been an opportunistic genus that filled the niche of many benthic invertebrates such as brachiopods that were heavily impacted by the extinction. A narrowing of the byssal notch and a trend towards a smoother shell in species of ''Claraia'' over time may have led to increased mobility. This increase in mobility may have been an advantage over more sessile animals during the extinction event.Feng, Qinglai; Gu, Songzhu; He, Weihon ...
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Werfen Formation
The Werfen Formation is a geologic formation in the Southern Limestone Alps and Dinaric Alps of Austria, Bosnia and Herzegovina Bosnia and Herzegovina, sometimes known as Bosnia-Herzegovina and informally as Bosnia, is a country in Southeast Europe. Situated on the Balkans, Balkan Peninsula, it borders Serbia to the east, Montenegro to the southeast, and Croatia to th ..., and Italy. It preserves fossils dating back to the Triassic Period (geology), period.Werfen Formation
at Fossilworks.org

Fossil content

The formation has provided numerous fossils typical of a shallow lagoon environment, including: * ''Eotiaris, Eotiaris teseroensis'' (a crown-group echinoid from Changhsingian aged bed (geology), beds of the Tesero Member)
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