Miocidaris

Miocidaris; Temporal range:
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Order:	Cidaroida
Family:	†Miocidaridae
Genus:	†Miocidaris; Döderlein, 1887
Type species
	Miocidaris keyserlingi; Geinitz, 1848
Other species
	Miocidaris adrianae Zardini, 1975; Miocidaris amalthei Quenstedt, 1875; Miocidaris platyacantha Nisiyama, 1966; Miocidaris spinulifera Nisiyama, 1966;

Miocidaris is an extinct genus of miocidarid sea urchin that lived from the Permian to the Jurassic period.^[1]

Description

The tooth structure of Miocidaris keyserlingi is practically identical to that of modern-day cidarids, while its perignathic girdle structure and the morphology of its hemipyramid likewise display close affinities with modern cidaroids.^[2]

References

^ "PBDB Taxon". Retrieved 28 February 2026.
^ Smith, A. B.; Hollingworth, N. T. J. (May 1990). "Tooth structure and phylogeny of the Upper Permian echinoid Miocidaris keyserlingi". Proceedings of the Yorkshire Geological Society. 48 (1): 47–60. doi:10.1144/pygs.48.1.47. ISSN 0044-0604. Retrieved 28 February 2026 – via Lyell Collection Geological Society Publications.

[1] "PBDB Taxon". Retrieved 28 February 2026.

[2] Smith, A. B.; Hollingworth, N. T. J. (May 1990). "Tooth structure and phylogeny of the Upper Permian echinoid Miocidaris keyserlingi". Proceedings of the Yorkshire Geological Society. 48 (1): 47–60. doi:10.1144/pygs.48.1.47. ISSN 0044-0604. Retrieved 28 February 2026 – via Lyell Collection Geological Society Publications.

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