|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Strophomenata - Strophomenida - Glyptomenidae
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.
|G. A. Cooper 1956||Small, subrectangular shells with the hinge equal to or wider than the midwidth; piano- to slightly concavo-convex; surface multicostellate. Foramen not seen. Shell substance coarsely pseudopunctate.
Pedicle valve with long interarea, wide delthyrium covered by a pseudodeltidium. Teeth large; dental plates oblique, moderately long. Musculature not known.
Brachial interior with moderately strong and erect cardinal process consisting of 2 lobes and suggesting that of Leptaena. Brachiophores, flat blades, obliquely situated on each side of the cardinal process and supported by shell substance as in the Strophomenidae ; adductor field large ; subperipheral rim well developed and channeled by pallial trunks.