|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Strophomenata - Strophomenida - Rafinesquinidae
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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.
|F. B. Kelly 1967 (Ludfordina)||Small leptaeoid brachiopods having a more or less pronounced anteromedian sulcus. Both valves sharply geniculate dorsally; radial ornament and rugae obsolescent. Ventral muscle-scars elongate, dorsal ones not strongly defined.|