Harold & Telford (1990) reported examining 64 specimens of this species from Playa Lajas, Panama that were in D. Dexter's private collection. I have also collected specimens from Playa Las Lajas, Gulf of Chriqui that fit the description of this species. These were found in the intertidal zone, at low water.
Clark, H. L. (1947). A new and remarkable keyhole urchin Mellita notabilis n. sp. Bulletin of the Southern California Academy of Science 46, 77-78.
Mortensen, T. (1948). A monograph of the Echinoidea 4(2). Clypeasteroida. Copenhagen. 471 pp., 258 figures, 72 pls; pages: 428-429.
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.
Harold, A. S. & Telford, M. (1990). Systematics, phylogeny and biogeography of the genus Mellita (Echinoidea: Clypeasteroida). Journal of Natural History 24 , 987-1026.
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.
Mellita eduardobarrosoi Caso, 1981 (subjective junior synonym of Mellita notabilis)
