Echinoidea taxon details
original description
Mooi, R., Martínez, S.A., del Río, C.J., Ramos, M.I.F. (2018). Late Oligocene–Miocene non-lunulate sand dollars of South America: Revision of abertellid taxa and descriptions of two new families, two new genera, and a new species. <em>Zootaxa.</em> 4369(3): 301., available online at https://doi.org/10.11646/zootaxa.4369.3.1 page(s): 306 [details] Available for editors
From editor or global species database
Diagnosis As for the family, but with interambulacrum 5 continuous, basicoronal 5 contiguous with both postbasicoronals; postbasicoronals in interambulacrum 5 greatly elongated and arrow-shaped, at least three times the length of more distal oral postbasicoronals in the same interambulacrum; periproct marginal inside posterior notch. [details]
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