(/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 catalogue and list of names...

1900 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 Nusplingen Limestone (German: Nusplingen Plattenkalk) is a geological formation in Baden-Württemberg, Germany. It preserves fossils dating to the Kimmeridgian...

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

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

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

Holothuroidea Echinoidea...

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"...

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...

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

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

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

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

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

The Camarodonta are an order of globular sea urchins in the class Echinoidea. The fossil record shows that camarodonts have been in existence since the...

"The Largest Recorded Specimen of the Giant Heart Urchin, Brisus gigas (Echinoidea: Brissidae)". Records of the Auckland Museum. 47: 89–92. ISSN 1174-9202...

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

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...

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

starfish (Asteroidea), sea cucumbers (Holothuroidea), and sea urchins (Echinoidea). Appendage regeneration in echinoderms has been studied since at least...

Mooi R (eds.). "Heterocentrotus mamillatus (Linnaeus, 1758)". World Echinoidea Database. World Register of Marine Species. Clark, Ailsa M. (1971). Monograph...

Saima, Mahmoud; Asan, Anhar (2025-03-01). "Selected regular echinoids (Echinoidea) from the upper Campanian–Maastrichtian along the western borders of the...

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...

(2010). Caenopedina diomedeae (Mortensen, 1939). In: Kroh, A. & Mooi, R. (2010) World Echinoidea Database. at the World Register of Marine Species. v t e...

Scientific classification Kingdom: Animalia Phylum: Echinodermata Class: Echinoidea Order: Echinoida Family: Echinometridae Genus: Colobocentrotus Species:...