Orthoidea

Orthoidea is a superfamily of brachiopods containing the families:
 * Family Orthidae
 * Family Anomalorthidae
 * Family Bohemiellidae
 * Family Glyptorthidae
 * Family Hesperonomiidae
 * Family Hesperorthidae
 * Family Lycophoriidae
 * Family Nanorthidae
 * Family Orthidiellidae
 * Family Plaesiomyidae
 * Family Poramborthidae
 * Family Productorthidae
 * Family Whittardiidae