|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Strophomenata - Strophomenida - Grorudiidae
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|R. B. Neuman 1976||Wide, concavoconvex, parvicostellate shells, the dorsal valve having a chilidium and a bladelike cardinal process, the vent ral valve having an apically perforate pseudodeltidium; platform present on both valves, that of the dorsal va lve having a high median crest, that of the ventral valve having a low ridge between its deeply impressed inner margins.|