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Orthis

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Or´this    (ôr´thĭs)
prop. n.1.(Zool.) An extinct genus of Brachiopoda, abundant in the Paleozoic rocks.
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6, also abundant sponge remains; (2) blocks (Nos 16-22, 30, 34, and others in Wiman's table) containing specimens of leptaenids in association with dalmanellids; (3) blocks (Nos 1, 4, and 10) with the most diverse association of brachiopods comprising mainly Hulterstadia cor (Wiman), Sulevorthis lyckholmiensis (Wysog6rski), Skenidioides oelandica (Wiman), and Ogmoplecia plicata (Wiman), and some dalmanellids (identified by Wiman as Orthis argentea Hisinger and O.
Hulterstad brachiopods and associated faunas in the Vormsi Stage ... by Hints, Linda; Hints, Olle; Nemliher, Reet; Nolvak, Jaak / Estonian Journal of Earth Sciences
106, in the previous paragraph to the description of Platystrophia), deliberately based his definition of the genus on specimens of Orthis biforata "sensu" Davidson, 1848.
Platystrophia (Orthida) and new related Ordovician and early Silurian ... by Zuykov, Michael A.; Harper, David A.T. / Estonian Journal of Earth Sciences
 
 
 
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