In Panama this species has been collected from northeast of Contadora Island (8 35.733 N, 79 01.186 W), Gulf of Panama, eastern Pacific, from a depth of 7 m (Lessios, 2005).
Mortensen, T. (1951): A Monograph of the Echinoidea. V, 2. Spatangoida II. Amphisternata II. Spatangidæ, Loveniidæ, Pericosmidæ, Schizasteridæ, Brissidæ. - 593 pp., Copenhagen (C. A. Reitzel); pages: 502-503 .
Maluf, L. Y. (1988). Composition and distribution of the central eastern Pacific echinoderms. Natural History Museum of Los Angeles County Technical Reports, 2, 1– 242.
Lessios, H. A. (2005). Echinoids of the Pacific Waters of Panama: Status of knowledge and new records. Rev. Biol. Tropical 53 (sup. 3):147-170.
Alvarado, J. J., Solís-Marín, F. A. &. Ahearn, C. G. (2010). Echinoderm (Echinodermata) diversity in the Pacific coast of Central America. Marine Biodiversity 40: 45-56.
LSID urn:lsid:marinespecies.org:taxname:513804In this species the frontal notch is only faintly developed. The subgenus Rhabdobrissus Cotteau, 1889 was errected for species with no frontal notch. Some authors have raised this name to a genus level rank. Without a more detailed study, including molecular data, the significance of this character remains unclear, particulalry for species that have an intermediate character state.
