Clypeasteridae is a family of sea urchins in the order Clypeasteroida. This family was first scientifically described in 1835 by the Swiss-American biologist...

Echinarachniidae). Mellita quinquiesperforata test (Clypeasteridae) Clypeaster reticulatus test (Clypeasteridae) Echinodiscus tenuissimus test (Astriclypeidae)...

rosaceus, the fat sea biscuit, is a species of sea urchin in the family Clypeasteridae. It occurs in shallow water in the western Atlantic Ocean and was first...

or "sea biscuits", is a genus of echinoderms belonging to the family Clypeasteridae. The genus name Clypeaster is derived from the Latin “clypeus” (meaning...

the Japanese sea biscuit, is a species of sea urchin in the family Clypeasteridae. This species was first scientifically described in 1885 by the German...

the reticulated sea biscuit, is a species of sea urchin in the family Clypeasteridae. This species was first scientifically described in 1758 by Carl Linnaeus...

Australasian sand dollar, is a species of sea urchins of the family Clypeasteridae. Their armour is covered with spines. Clypeaster australasiae was first...

Clypeaster euclastus is a species of sea urchins of the family Clypeasteridae. Their armour is covered with spines. Clypeaster euclastus was first scientifically...

Clypeaster aloysioi is a species of sea urchins of the family Clypeasteridae. Their armour is covered with spines. C. aloysioi was first scientifically...

Mortensen, T. (1948). A Monograph of the Echinoidea. IV, 2. Clypeasteroida. Clypeasteridæ, Arachnoidæ, Fibulariidæ, Laganidæ and Scutellidæ. 471 pp., C. A. Reitzel...