Traits name details
original description
Brünnich Nielsen, K. 1942. Martinosigra elongata, g. n. et sp. n. A new echinoid from the Ehite Chalk of Denmark. Meddelelser fra Dansk Geologisk Forening 10, 159-166. page(s): 163-166; pl. 2: fig. 2 [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 
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