original description
Tzankov, V. 1930. Géologie du plateau de Šumen et ses environs immédiats. Zeitschrift der bulgarischen geologischen Gesellschaft 2, 1-77.
page(s): 27-29, 71; fig. 1, pl. 1: figs. 1-3 [details]
basis of record
Kier, P. M. & Lawson, M. H. 1978. Index of living and fossil echinoids 1924-1970. Smithsonian Contributions to Paleobiology 34, 1-182., available online at https://doi.org/10.5479/si.00810266.34.1
page(s): 92 [details] Available for editors
From editor or global species database
Distribution Bulgaria [details]
Fossil Range Aturien, Paleocene [details]