Miocidaris

Miocidaris; Temporal range: Middle Permian–Sinemurian PreꞒ Ꞓ O S D C P T J K Pg N
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.

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.

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.

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[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.