(/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...

the clade Asterozoa, or that they were sister to the (Holothuroidea + Echinoidea) as the clade Cryptosyringida. However, a 2014 analysis of 219 genes from...

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

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...

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

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

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

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

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

Holothuroidea Echinoidea...

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

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

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

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...

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...

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

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

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

Research Institute. Retrieved 4 June 2018. Schultz, Heinke A.G. (2017). Echinoidea: with bilateral symmetry. Irregularia. De Gruyter. pp. 58–61. ISBN 978-3-11-036853-6...

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...

(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...

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

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

at the Zoological Museum, Copenhagen. He specialized in sea urchins (Echinoidea) and provided an enormous marine collection to the museum. He collected...

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

Clypeaster australasiae (Gray, 1851). In: Kroh, A. & Mooi, R. (2010) World Echinoidea Database. at the World Register of Marine Species. Edgar, Graham J. (2008)...