|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Rhynchonellata - Orthida - Platystrophiidae
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.
|M. A. Zuykov and D. A. T. Harper 2007||Neoplatystrophia species having moderate sized to large shells, subrectangular in outline with maximum width in anterior third of shell; ventral sulcus deep, wide with two costae umbonally, increased by implantation of costa on each side, so on anterior margin number commonly four; dorsal median fold with three costae in young growth stages, normally external costae developed on outer pair, with branching on either side of median costa in later growth stages, resulting with five costae at anterior margin; on each flank about nine costae which may increase to 12 by development, not only of additional costae along the hingeline at later stages of growth, but by implantation of additional costae.|