original description
Morishita, A. 1955. Notes on Echinarachnius in Japan. Memoirs of the College of Science, University of Kyoto B 22, 223-236.
page(s): 229-231; pl. 11: figs. 5-7 [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): 69 [details] Available for editors
From editor or global species database
Distribution Japan [details]
Fossil Range Middle Miocene [details]
Taxonomic remark New name for Sismondia naganoensis Morishita, 1953, invalidated [details]