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†Delthyridina (Suborder) ..†Reticularioidea (Superfamily) ..†Delthyridoidea (Superfamily) ....†Acrospiriferidae (Family) ....†Cyrtinopsidae (Family) ....†Delthyrididae (Family) ....†Hysterolitidae (Family) ....†Mucrospiriferidae (Family)

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Last updated: 28 Aug 2026