| Discinida Temporal range:
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Scientific classification 
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| Domain: | Eukaryota | ||||||
| Kingdom: | Animalia | ||||||
| Phylum: | Brachiopoda | ||||||
| Subphylum: | Linguliformea | ||||||
| Order: | Discinida | ||||||
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Discinida is an order of brachiopods comprising the extant superfamily Discinoidea, and the extinct superfamilies Botsfordioidea (early—mid-Cambrian) and Acrotheloidea (early Cambrian–Early Ordovician).[2] It represents a sister taxon to the Lingulids, and is possibly paraphyletic with respect to the Acrotretoids.[3][verification needed]—or the acrotretids are paraphyletic with respect to it.[4] The group displays a broad range of shell structures, some of which incorporate substantial organic or silicified components.[3]
- ^ "Discinida". Archived from the original on 2013-03-06. Retrieved 1 September 2016.
- ^ Ruppert, E.E; Fox, R.S.; Barnes, R.D (2004). Invertebrate Zoology (7 ed.). Brooks/Cole. pp. 821–829. ISBN 978-0-03-025982-1.
- ^ a b Williams, A.; Cusack, M.; Buckman, J. O. (1998). "Chemico-structural phylogeny of the discinoid brachiopod shell". Philosophical Transactions of the Royal Society B: Biological Sciences. 353 (1378): 2005–2038. doi:10.1098/rstb.1998.0350. PMC 1692430.
- ^ Williams, Alwyn; MacKay, Sarah; Cusack, Maggie (1992-07-29). "Structure of the organo-phosphatic shell of the brachiopod Discina" (PDF). Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences. 337 (1279): 83. Bibcode:1992RSPTB.337...83W. doi:10.1098/rstb.1992.0086.>