科研之友
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摘要
'Stereocidaris' keertii Smith, 2010 is the second cidaroid echinoid being reported 123 years after the first one, i.e. 'S.' namadica (Duncan, 1887), on the strength of a single specimen, picked loose, from an abandoned quarry at Karondia, assigning both of them a Turonian age. While keertii, at the first glance, looks very similar to 'S.' namadica, the former has been deemed differentiable from the latter for its wider perradial ambulacral zone filled with smaller, somewhat elongate granules, and the degree of coarseness of the extrascrobicular granulation of their interambulacral plates.
- 出版日期2011-12
