Description: English: Eucidaris tribuloides (Slate-pencil Urchin). Français : (Eucidaris tribuloides), un oursin crayon. Date: 3 June 2010. Source: Own work. Author: Nhobgood (talk) Nick Hobgood. Camera location19° 42′ 45.93″ N, 71° 50′ 42.12″ WView all coordinates using: OpenStreetMap 19.712758; -71.845033.
Description: Português: Eucidaris tribuloides (Lamarck, 1816). Acervo de invertebrados marinhos do Museu Nacional/UFRJ. Rio de Janeiro, RJ, Brasil. Date: 11 January 2015, 13:13:39. Source: Own work. Author: Dornicke.
Eucidaris tribuloides (aboral view), collected off of Piedra de Galera, San Blas, Caribbean coast, Panama. Source : Echinoderms of Panama (http://echinoderms.lifedesks.org/file-colorboxed/217).