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Phyllacanthus irregularis at the northeast point of Mondrain Island, Western Australia.
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Plococidaris verticillata seen in Mtsamboro, Mayotte (western Indian ocean).
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Stereocidaris hawaiiensis observed by NOAA Okeanos Explorer deep-water mission off to Hawaii in 2015.
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aboral view of the holotype from Fell, H. B. 1958. Deep-Sea Echinoderms of New Zealand. Zoology Publications from Victoria University of Wellington 24, 1-40.
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ambital ambulacral plates from Fell, H. B. 1958. Deep-Sea Echinoderms of New Zealand. Zoology Publications from Victoria University of Wellington 24, 1-40.
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Eucidaris galapagensis observed close to Puerto Ayora, Galapagos. Picture (https://www.inaturalist.org/observations/7754497) by Souhjiro (https://www.inaturalist.org/people/souhjiro).
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Preserved specimen of Tylocidaris ohshimai from MNHN, probably found around Philippines.