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Rhaetina
Rhaetina is an extinct genus of brachiopods belonging to the family Angustothyrididae.
Species within this genus include:
This genus is known in the fossil record from the Triassic period (from about 251.3 to 201.6 million years ago). Fossils of species within this genus have been found in Europe, Canada, United States, China, Iran, Russia, Ukraine and Vietnam.
It is one of the most common Late Triassic brachiopod species, that has been regarded as a survivor that ranges across the Triassic-Jurassic boundary into the Early Jurassic. The external morphology of specimens from before and after the Triassic–Jurassic extinction event were initially regarded identical. Study of the internal features showed they were actually distinct species to be assigned to different genera (See Elvis taxon).
Rhaetina
Rhaetina is an extinct genus of brachiopods belonging to the family Angustothyrididae.
Species within this genus include:
This genus is known in the fossil record from the Triassic period (from about 251.3 to 201.6 million years ago). Fossils of species within this genus have been found in Europe, Canada, United States, China, Iran, Russia, Ukraine and Vietnam.
It is one of the most common Late Triassic brachiopod species, that has been regarded as a survivor that ranges across the Triassic-Jurassic boundary into the Early Jurassic. The external morphology of specimens from before and after the Triassic–Jurassic extinction event were initially regarded identical. Study of the internal features showed they were actually distinct species to be assigned to different genera (See Elvis taxon).
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