Pseudodiadematidae

Pseudodiadematidae are members of the phylum Echinodermata.^[1] Their fossil remains date to the Cretaceous period (144 - 66.4 MYA). Its child geniuses are Acanthechinopsis, Acrocidaris, Acrotiaris and Aplodiadema. The distribution of fossils in the Cretaceous are in Algeria, Brazil, Egypt, France, Hungary, Jordan, Madagascar, Morocco, Nigeria, Peru, Portugal, Saudi Arabia, Spain, Switzerland, the United Arab Emirates, the United Kingdom, United States (Texas), and Yemen. In the Jurassic to Cretaceous it is found in China. In the Jurassic found in Ethiopia, France, Germany, India, Luxembourg, Morocco, Poland, Portugal, Saudi Arabia, Somalia, Switzerland, and the United Kingdom.^[2]

Pseudodiadematidae
Acrocidaris nobilis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Order:	†Hemicidaroida
Family:	†Pseudodiadematidae

The full fossil reference needs translation into English.^[3]

References

1. Zoology, Harvard University Museum of Comparative (1872). Illustrated Catalogue of the Museum of Comparative Zoölogy, at Harvard College. Sever and Francis. p. 291.
2. "Fossilworks: Pseudodiadematidae". Paleobiology Database. Retrieved 2023-04-21.
3. Pomel, A. (1883). Classification méthodique et genera des échinides vivants et fossiles. Alger: A. Jourdan.