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ID number: BIRUG: BU903 Institution: The Lapworth Museum of Geology Definition: Illaenus (Parillaenus) davisi (Salter, 1849) Object type: Trilobita Place collected: WALES: Merioneth, Bala, first exposure NE of head of stream leading down to stepping stones Chronostratigraphy: ORDOVICIAN: Ashgill Biostratigraphy: P. parabola zone Lithology: Upper Bala series, Rhiwlas limestone Type, figured or cited: Figured |
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