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Dictyonellida Cooper, 1956 is a brachiopod order within the class Chileata, characterised by a perforation in the ventral valve that is extended through resorption and covered by a colleplax. The dictyonellides are known from the Upper Ordovician to the Lower Permian.1. Williams, A., Carlson, S.J., Brunton, C.H.C., Holmer, L.E., Popov, L.E., Mergl, M., Laurie, J.R., Bassett, M.G., Cocks, L.R.M., Rong, J.-Y., et al. (2000). Treatise on Invertebrate Paeontology. Part H, Brachiopoda (Revised). Volume 2: Linguliformea, Craniiformea, and Rhynchonelliformea. (Geological Society of America & University of Kansas).
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