The Echinothurioida are an order of sea urchins in the class Echinoidea. Echinothurioids are distinguished from other sea urchins by the combination of a flexible test and hollow spines. The membrane around the mouth contains only simple plates, in contrast to the more complex mouth parts of their close relatives, the Diadematoida. They are nearly all deepsea dwellers.
Araeolampas atlantica is a species of sea urchin of the family Loveniidae. Their armour is covered with spines. It is placed in the genus Arachnoides and lives in the sea. Araeolampas atlantica was first scientifically described in 1974 by K. Serafy.
Araeosoma alternatum is a species of sea urchin of the family Echinothuriidae. Their armour is covered with spines. It is placed in the genus Araeosoma and lives in the sea. Araeosoma alternatum was first scientifically described in 1934 by Ole Theodor Jensen Mortensen, a Danish zoologist.
Araeosoma belli is a species of sea urchin of the family Echinothuriidae. Their armour is covered with spines. It is placed in the genus Araeosoma and is found throughout the Caribbean Sea as well as areas around the Gulf of Mexico. Araeosoma belli was first scientifically described in 1903 by Ole Theodor Jensen Mortensen, a Danish zoologist.
Araeosoma owstoni is a species of sea urchin of the family Echinothuriidae. Their armour is covered with spines. It is placed in the genus Araeosoma and lives in the sea. Araeosoma owstoni was first scientifically described in 1904 by Ole Theodor Jensen Mortensen.
Araeosoma parviungulatum is a species of sea urchin of the family Echinothuriidae. Their armour is covered with spines. It is placed in the genus Araeosoma and lives in the sea. Araeosoma parviungulatum was first scientifically described in 1934 by Ole Theodor Jensen Mortensen.
Araeosoma paucispinum is a species of sea urchin of the family Echinothuriidae. Their armour is covered with spines. It is placed in the genus Araeosoma and lives in the sea. Araeosoma paucispinum was first scientifically described in 1924 by Hubert Lyman Clark, an American zoologist.
Araeosoma splendens is a species of sea urchin of the family Echinothuriidae. Their armour is covered with spines. It is placed in the genus Araeosoma and lives in the sea. Araeosoma splendens was first scientifically described in 1934 by Ole Theodor Jensen Mortensen.
Araeosoma tessellatum is a species of sea urchin of the family Echinothuriidae. Their armour is covered with spines. It is placed in the genus Araeosoma and lives in the sea. Araeosoma tessellatum was first scientifically described in 1879 by Alexander Emanuel Agassiz.
Araeosoma thetidis is a species of sea urchin of the family Echinothuriidae. This species can be found in deep sea off Australia and New Zealand. A. thetidis was first scientifically described in 1909 by Hubert Lyman Clark.
Araeosoma violaceum is a species of sea urchin of the family Echinothuriidae. Its armour is covered with spines. It is placed in the genus Araeosoma and lives in the sea. A. violaceum was first scientifically described in 1903 by Ole Theodor Jensen Mortensen.
Arbacia crassispina is a species of sea urchin of the family Arbaciidae. Its armour is covered with spines. A. crassispina was first scientifically described in 1910 by Ole Theodor Jensen Mortensen.
Arbacia dufresnii is a species of sea urchin of the family Arbaciidae. Its armour is covered with spines. A. dufresnii was first scientifically described in 1825 by Blainville.
Calveriosoma hystrix is a species of sea urchins of the Family Echinothuriidae. Their armour is covered with spines. Calveriosoma hystrix was first scientifically described in 1872 by Thomson.
Calymne relicta is a species of sea urchins of the Family Calymnidae. Their armour is covered with spines. Calymne relicta was first scientifically described in 1877 by Thomson.
