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ID number: BIRUG: BU2745 Institution: The Lapworth Museum of Geology Definition: Tetractine spicules Object type: Sponge Place collected: WALES: N. Builth Inlier, Llandegley rocks Chronostratigraphy: ORDOVICIAN: Llanvirn Biostratigraphy: D. bifidus zone Type, figured or cited: Figured |
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