Arachnoides placenta

Arachnoides placenta is a species of sea urchin of the family Clypeasteridae. Their armour is covered with spines. It is placed in the genus Arachnoides and lives in the sea. Arachnoides placenta was first scientifically described in 1758 by Carl Linnaeus.^[1]

Arachnoides placenta
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Order:	Clypeasteroida
Family:	Clypeasteridae
Genus:	Arachnoides
Species:	A. placenta
Binomial name
Arachnoides placenta (Linnaeus, 1758)