Temporal range: Cambrian–Lower Devonian
Dinocaridida[derivation 1] is a proposed extinct taxon of fossil arthropod-like marine animals found, with one exception, in the Cambrian and Ordovician. It is subdivided into the anomalocaridids and the opabinids. The name of this group comes from Greek, "deinos" and "caris", meaning "terror shrimp" or "terror crab", due to their crustacean-like appearance and the hypotheses suggesting that members of this class were the apex predators of their time.
Dinocaridids are bilaterally symmetrical, with a non-mineralized cuticle and a body divided into two major tagmata, or body-sections. The frontal section should have one or more claws found just in front of the mouth, which is located on these creatures' underside. The body will possess thirteen or more segments, each with its own gill branch and swimming lobe. It is thought that these lobes moved in an up-and-down motion to propel the animal forward  in a fashion similar to the cuttlefish.
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- Van Roy, P.; Briggs, D. E. G. (2011). "A giant Ordovician anomalocaridid". Nature 473 (7348): 510–513. doi:10.1038/nature09920. edit
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- Budd, G. E. (1996). "The morphology of Opabinia regalis and the reconstruction of the arthropod stem-group". Lethaia 29: 1. doi:10.1111/j.1502-3931.1996.tb01831.x.
- Ponomarenko, A. G. (2010). "First record of Dinocarida from Russia". Paleontological Journal 44 (5): 503–504. doi:10.1134/S0031030110050047.
- Kühl, G.; Briggs, D. E. G.; Rust, J. (Feb 2009). "A Great-Appendage Arthropod with a Radial Mouth from the Lower Devonian Hunsrück Slate, Germany". Science 323 (5915): 771–3. Bibcode:2009Sci...323..771K. doi:10.1126/science.1166586. ISSN 0036-8075. PMID 19197061.
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