Related Research Articles
Sand dollars are species of flat, burrowing sea urchins belonging to the order Clypeasteroida. Some species within the order, not quite as flat, are known as sea biscuits. Sand dollars can also be called "sand cakes" or "cake urchins".
Diadema is a genus of sea urchins of the family Diadematidae.
The heart urchins or Spatangoida are an order of sea urchins.
The Atelostomata are a type of sea urchins. They are distinguished from other sea urchins by their irregular shape and the absence of a feeding lantern. The group includes the well known heart urchins, as well as some less familiar and extinct forms.
Cidaridae is a family of sea urchins in the order Cidaroida.
Anochanus sinensis is a species of sea urchin of the family Cassiduloida. Their armour is covered with spines. It is placed in the genus Anochanus and lives in the sea. Anochanus sinensis was first scientifically described in 1868 by Adolph Grube.
Holasteroida is an order of irregular sea urchins.
Tripneustes is a genus of sea urchins belonging to the family Toxopneustidae.
Toxopneustes is a genus of sea urchins from the tropical Indo-Pacific. It contains four species. They are known to possess medically significant venom to humans on their pedicellariae. They are sometimes collectively known as flower urchins, after the most widespread and most commonly encountered species in the genus, the flower urchin.
Echinometra viridis, the reef urchin, is a species of sea urchin in the family Echinometridae. It is found on reefs in very shallow parts of the western Atlantic Ocean and the Caribbean Sea.
Cidaris blakei is a species of sea urchins of the family Cidaridae. Its armour is covered with spines of three types, one unique type being extended and fan-like, making it easily recognized. Alexander Agassiz first described it scientifically in 1878. It is present on the seabed in deep waters in the Gulf of Mexico and the Bahamas.
Irregularia is an extant infraclass of sea urchins that first appeared in the Lower Jurassic.
The Neognathostomata are a superorder of sea urchins.
Toxopneustes roseus is a species of sea urchin from the East Pacific. It is sometimes known as the rose flower urchin or the pink flower urchin. Like the related flower urchin, they are venomous.
Toxopneustes maculatus is a rare species of sea urchin found in the Indo-West Pacific.
Aeropsis is a genus of sea urchins in the family Aeropsidae.
Chondrocidaris is a genus of sea urchins of the family Cidaridae described in 1863 by Alexander Agassiz. There are two living species and several fossil species dating as far back as the Miocene.
Tetragramma is a genus of fossil sea urchins known from the Upper Jurassic (Oxfordian) to the Upper Cretaceous (Turonian).
Dermechinus is a genus of sea urchin in the family Echinidae found in deep water in the southern Indian, Pacific and Atlantic Oceans. It is monotypic, with Dermechinus horridus, sometimes called the cactus urchin, being the only species.
Pseudocentrotus depressus, commonly known as the pink sea urchin, is a species of sea urchin, one of only two species in the genus Pseudocentrotus. It was first described in 1864 by the American marine zoologist Alexander Agassiz as Toxocidaris depressus, having been collected during the North Pacific Exploring and Surveying Expedition undertaken by Captain Cadwalader Ringgold and later Captain John Rodgers.
References
- 1 2 3 Camilla Souto; Rich Mooi; Luciana Martins; Carla Menegola; Charles R. Marshall (2019). "Homoplasy and extinction: the phylogeny of cassidulid echinoids (Echinodermata)". Zoological Journal of the Linnean Society. 2019 (3): 622–660. doi: 10.1093/zoolinnean/zlz060 .
- Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 981. ISBN 0-03-056747-5.
- National History Museum. "Cassiduloida" . Retrieved 19 Dec 2009.
- Kroh A, Mooi R (eds.). "Cassiduloida". World Echinoidea Database. World Register of Marine Species.
 | This article about a sea urchin is a stub. You can help Wikipedia by expanding it. |