Description: English: Zebrida adamsii (zebra urchin crab), commensal with short spine sea urchins, here on a fire urchin, Asthenosoma varium. In Komodo area, Indonesia. Date: 29 July 2009. Source: Own work. Author: Jason Marks.
Description: English: Closeup of a fire urchin, Asthenosoma varium. Near Alor Island, Indonesia. Date: 24 November 2011. Source: Own work. Author: Jason Marks.
NIWA (National Institute of Water and Atmospheric research)
Wikimedia Commons
Description: Français : Un "oursin de cuir" (Araeosoma thetidis) photographié à 188m de profondeur au large du nord de la Nouvelle-Zélande, par une mission de la NIWA.English: A deep-sea leather sea urchin (Araeosoma thetidis) photographed in situ at a depth of 188 m from off the north of New Zealand. Date: 7 September 2015. Source: Dr. Owen Anderson. Author: NIWA (National Institute of Water and Atmospheric research). Permission(Reusing this file): : This work is free and may be used by anyone for any purpose. If you wish to use this content, you do not need to request permission as long as you follow any licensing requirements mentioned on this page. The Wikimedia Foundation has received an e-mail confirming that the copyright holder has approved publication under the terms mentioned on this page. This correspondence has been reviewed by an Volunteer Response Team (VRT) member and stored in our permission archive. The correspondence is available to trusted volunteers as ticket #2018040410001763. If you have questions about the archived correspondence, please use the OTRS noticeboard. Ticket link: https://ticket.wikimedia.org/otrs/index.pl?Action=AgentTicketZoom&TicketNumber=2018040410001763.
Araeosoma thetidis observed in situ at a depth of 188 m from off the north of New Zealand. Picture (https://commons.wikimedia.org/wiki/File:Araeosoma_thetidis_insitu.tif?uselang=fr) courtesy of Dr. Owen Wilson (National Institute of Water and Atmospheric research)
Indian ocean leather urchin Asthenosoma marisrubri observed off Marsa Alam, Egypt. Picture (https://www.inaturalist.org/observations/2794629) courtesy of Ronald Werson.
Araeosoma leptaleum, aboral view. Collected off Isla Montuosa, Gulf of Chiriqui, Panama, eastern Pacific, from 2200 ft. Source : Echinoderms of Panama (http://echinoderms.lifedesks.org/file-colorboxed/302).
Holotype of Retzneiosoma jaseneki Kroh, 2005 (NHMW 2003z0071/0002) from the Badenian (= Middle Miocene) of Retznei, Austria Kroh, A. 2005. Catalogus Fossilium Austriae. Band 2. Echinoidea neogenica, pp. lvi+210. Österreichische Akademie der Wissenschaften; Wien.
Holotype of Retzneiosoma jaseneki Kroh, 2005 (NHMW 2003z0071/0002) from the Badenian (= Middle Miocene) of Retznei, Austria Aboral view showing imbricate plates, “membranous” gaps, and aboral tuberculation (A). Notice that large parts of the aboral surface are missing exposing the lantern and the inside of the oral surface (B; showing ambulacral plating). Kroh, A. 2005. Catalogus Fossilium Austriae. Band 2. Echinoidea neogenica, pp. lvi+210. Österreichische Akademie der Wissenschaften; Wien.