Billingsellida
An order of brachiopods containing the families: * Suborder Billingsellidina ** Superfamily Billingselloidea *** Family Billingsellidae * Suborder Clitambonitidina ** Superfamily Clitambonitoidea *** Family Clitambonitidae *** Family Gonambonitidae ** Superfamily Polytoechioidea *** Family Polytoechiidae References Strophomenata {{Brachiopod-stub ...
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