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Mespilia globulus, the globular sea urchin, sphere sea urchin, or tuxedo urchin (trade name), is a sea urchin occurring in tropical shallow reef habitats. [1] The specific name refers to a small ball or spherule, describing its overall shape/morphology. [1] It is the only species in the genus Mespilia. [2]
Tripneustes gratilla, the collector urchin, is a species of sea urchin. Collector urchins are found at depths of 2 to 30 metres (7 to 100 ft) in the waters of the Indo-Pacific , Hawaii , the Red Sea , and The Bahamas.
Toxopneustes pileolus, commonly known as the flower urchin, is a widespread and commonly encountered species of sea urchin from the Indo-West Pacific. It is considered highly dangerous, as it is capable of delivering extremely painful and medically significant stings when touched.
Tripneustes depressus is the largest sea urchin species in the Galápagos Islands with a mean diameter of 11.5 cm (4.5 in). The growth rate averages 0.5 mm (0.02 in) per month. [ 4 ] There is very little difference in morphology between T. depressus , Tripneustes gratilla and Tripneustes ventricosus ; they are suspected of being the same ...
Z. adamsii lives in symbiosis with a sea urchin, living among its spines. [4] Sea urchins on which it has been found include Asthenosoma ijimai, Diadema setosum, Heliocidaris crassispina, Pseudocentrotus depressus, Salmacis bicolor, Salmacis virgulata, Toxopneustes elegans, Toxopneustes pileolus, Tripneustes gratilla and a species of Acanthocidaris. [3]
Toxopneustes roseus is similar in appearance to the more widespread flower urchin, Toxopneustes pileolus.It can be distinguished by having a rigid "shell" that is a solid pink, red, or purple in color, in contrast to the variegated coloration of the test of Toxopneustes pileolus.
Echinopsis is an extinct genus of sea urchins in the class Echinoidea.. These slow-moving low-level epifaunal grazers lived from the Cretaceous to the Paleogene periods (125.45 - 5.332 Ma).
Araeosoma tessellatum 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. tessellatum was first scientifically described in 1879 by Alexander Emanuel Agassiz. [1]