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Diadema antillarum (Philippi, 1845) Gulf of Mexico Diadema ascensionis (Mortensen, 1909) Central tropical Atlantic Diadema mexicanum (Agassiz, 1863) West coast of tropical Americas Diadema palmeri (Baker, 1967) South-west Pacific, especially New Zealand Diadema paucispinum (Agassiz, 1863) Central Pacific, and possibly North Indian Ocean and ...
Diadema savignyi is a species of long-spined sea urchin belonging to the family Diadematidae. Common names include long-spined sea urchin , black longspine urchin and the banded diadem . It is native to the east coast of Africa, the Red Sea, the Indian Ocean and western Pacific Ocean.
The Diadematidae are a family of sea urchins.Their tests are either rigid or flexible and their spines are long and hollow. [2]Astropyga Gray, 1825 . Astropyga radiata (Leske, 1778), extant
Diadema antillarum has a "shell," similar to most other sea urchins. What distinguishes the Diadema is the length of its spines. Most sea urchin spines are 1–3 cm, but the spines in this species are usually 10–12 cm in length, and can grow as long as 30 cm in very large individuals.
Diadema paucispinum is a small sea urchin with very long, moveable spines which are slender and sharply pointed. They can be up to 25 cm (10 in) long and about four times the diameter of the test. The primary spines are bluish-black in colour, often with pale bands in younger individuals.
Approximately 23 species of sea urchins, 3 species of heart urchins, and 9 species of sand dollars call the Gulf of California habitat their home. Where they are found throughout the Gulf of California, can be classified into three biogeographic regions called the Northern Gulf, Central Gulf, and Southern Gulf.
Diadema setosum is a species of long-spined sea urchin belonging to the family Diadematidae. It is a typical sea urchin, with extremely long, hollow spines that are mildly venomous . D. setosum differs from other Diadema with five, characteristic white dots that can be found on its body.
Echinothrix diadema is a long spined urchin. With its spines, the typical diameter is 10–20 cm (3.9–7.9 in). [2] The internal organs are enclosed in the test, covered by a thin dermis and epidermis. [3] It is generally black or blue-black in colour, and always dark (the spines show a blue sheen in the light).