(/ˈɜːrtʃɪnz/) are typically spiny, globular animals, echinoderms in the class Echinoidea. About 950 species live on the seabed, inhabiting all oceans and depth...

The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms...

745 species), Ophiuroidea (brittle stars, with around 2,300 species), Echinoidea (sea urchins and sand dollars, with some 900 species), Holothuroidea (sea...

and does not pose a serious threat to humans. As a member of the class Echinoidea, the anatomy of Diadema setosum is that of a typical sea urchin. All of...

(July/August): 12–13. Dix, Trevor G. (June 1970). "Biology ofevechinus chloroticus(echinoidea: Echinometridae) from different localities". New Zealand Journal of Marine...

The Solnhofen Limestone or Solnhofen Plattenkalk is a collective term for multiple Late Jurassic lithographic limestones in southeastern Germany, which...

This List of echinoderm orders concerns the various classes and orders into which taxonomists categorize the roughly 7000 extant species as well as the...

forms) and Eleutherozoa, with Echinozoa now having its modern contents of Echinoidea as the sister to a clade containing Holothuroidea and the extinct (and...

classification Domain: Eukaryota Kingdom: Animalia Phylum: Echinodermata Class: Echinoidea Superorder: Gnathostomata Order: Clypeasteroida Suborders and families...

April 2017). "A diverse assemblage of Permian echinoids (Echinodermata, Echinoidea) and implications for character evolution in early crown group echinoids"...

The Nusplingen Limestone (German: Nusplingen Plattenkalk) is a geological formation in Baden-Württemberg, Germany. It preserves fossils dating to the Kimmeridgian...

Holothuroidea Echinoidea...

Subphylum Crinozoa (sea lillies and extinct relatives) Subphylum Echinozoa Echinoidea (sea urchins) Holothuriodea (sea cucumbers) There is a possibility that...

been around since the Pliocene epoch. Kroh, A.; Mooi, R. (2020). World Echinoidea Database. Echinarachnius parma (Lamarck, 1816). Accessed through: World...

The Pitkin Formation, or Pitkin Limestone, is a fossiliferous geologic formation in northern Arkansas that dates to the Chesterian Series of the late Mississippian...

stiff to limp depending on the current for optimal filter feeding. The Echinoidea, sand dollars, use MCTs to grow and replace their rows of teeth when they...

and exclusively marine, including starfish (Asteroidea), sea urchins, (Echinoidea), brittle stars (Ophiuroidea), sea cucumbers (Holothuroidea) and feather...

and feather stars) Asteroidea (star fish) Ophiuroidea (brittle stars) Echinoidea (sea urchins) Holothuroidea (sea cucumbers) Entoprocta Gastrotricha Gnathostomulida...

The Echinothurioida are an order of sea urchins in the class Echinoidea. Echinothurioids are distinguished from other sea urchins by the combination of...

(2024). "A paedomorphic dwarf species, Gauthieria pumilio sp. nov. (Echinoidea: Phymosomatidae), from the Campanian (Late Cretaceous) of Hannover, Germany"...

The marine waters of the Houtman Abrolhos, an island chain off the coast of Western Australia, has been recorded as containing 172 species of echinoderm...

during compaction. Flint is often deposited around larger fossils such as Echinoidea which may be silicified (i.e. replaced molecule by molecule by flint)...

concentrations in the ink sac of the cuttlefish Sepia Officianalis), echinoidea (found in sand dollars, and the hearts of sea urchins), holothuroidea...

Long Island Sound is a large marine estuary in the Northeastern United States. It forms the maritime border between the states of New York and Connecticut...

in 1864. "World Echinoidea Database - Echinoidea taxon details - Strongylocentrotus intermedius (A. Agassiz, 1864)". World Echinoidea Database. World...

British fossil Echinodermata of the Oolitic formations. Volume I – The Echinoidea. London: The Palaeontographical Society. Wright, Thomas (1863–1880). Monograph...

in 1986. Marine fauna includes a large number of littoral crustaceans, echinoidea, etc., as well as a large assortment of reef fishes and a number of species...

Grasshopper Orthoptera 29.3 20.5 20.7 29.3 1.00 0.99 41.2 58.6 Sea urchin Echinoidea 32.8 17.7 17.3 32.1 1.02 1.02 35.0 64.9 Wheat Triticum 27.3 22.7 22.8...

Scientific classification Kingdom: Animalia Phylum: Echinodermata Class: Echinoidea Order: Phymosomatoida Family: Diplopodiidae Genus: Tetragramma Species:...

(130 ft) have been found in the fossil record. Sea urchins and allies (Echinoidea) The largest sea urchin is the species Sperosoma giganteum from the deep...