Ornamentation and Shell Microstructure of Orbiculoidea magnifica Mergl (Brachiopoda, Lingulida) from the Lower Devonian of the Timan–Pechora Basin


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Abstract

The organophosphate-shelled brachiopods are for the first time described from the Lower Devonian (Lochkovian) of the Timan–Pechora Basin. Several shells preserved both protegulum and brephic shell. The shell microstructure of the Early Devonian Orbiculoidea cf. magnifica Mergl, 2001, is described for the first time, including its changes at different developmental stages.

About the authors

T. N. Smirnova

Moscow State University

Author for correspondence.
Email: smirnovatatiana76@bk.ru
Russian Federation, Moscow, 119992

Yu. A. Gatovsky

Moscow State University

Author for correspondence.
Email: ustas62@bk.ru
Russian Federation, Moscow, 119992

E. A. Zhegallo

Borissiak Paleontological Institute, Russian Academy of Sciences

Author for correspondence.
Email: ezheg@paleo.ru
Russian Federation, Moscow, 117647

G. T. Ushatinskaya

Borissiak Paleontological Institute, Russian Academy of Sciences

Author for correspondence.
Email: gushat@paleo.ru
Russian Federation, Moscow, 117647


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