Genus

Barbarorthis Öpik, 1934

Selection of related publications
Oraspõld, A. L. 1959. Some representatives of the Superfamily Orthacea from the Upper Ordovician of Estonia. Tartu Riikliku Ülikooli Toimetised 75, I, 51-79.
Öpik, A. 1934. Über Klitamboniten. Acta et Commentationes Universitatis Tartuensis XXVI, 5, 1-239. K. Mattiesen.
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Classification