Rodzaj Biernatium Havlíček, 1975
Gatunek typowy Opis Shell transversely semioval, coarsely costellate valves with narrowly divergent delthyrium variably open or closed by apical plate; ventral interarea subpyramidal, apsacline to catacline; ventral interior with recessive dental plates; dorsal interior with ridgelike cardinal process and long rodlike brachiophores; cruralium long, narrowing anteriorly; fulcral plates absent. Synonimy Zasięg czasowy Early Devonian (Pragian) to Late Devonian (Frasnian); Europe, Africa (Morocco), Asia (Myanmar), Western Australia. Literatura |
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