Top Results for Cidaroid

Eucidaris tribuloides is a species of cidaroid sea urchin found in the Caribbean Sea and western Atlantic Ocean, first described by Jean-Baptiste Lamarck in 1816. Commonly known as the slate pencil urchin, it has thick, blunt spines typical of cidaroids, a group considered morphologically primitive...

Phyllacanthus imperialis is a species of sea urchin belonging to the family Cidaridae, commonly known as the imperial pencil urchin. First described by Jean-Baptiste Lamarck in 1816, this echinoid is native to the shallow waters of the Indo-Pacific region. It is characterized by its distinctive, thi...

Eucidaris galapagensis, described by German zoologist Ludwig Döderlein in 1887, is a species of pencil urchin endemic to the Galápagos Islands. This sea urchin is characterized by its thick, blunt spines that resemble pencils and its distinctive globular test (shell), which typically measures 3-5 ce...

Eucidaris thouarsii is a species of slate-pencil sea urchin belonging to the family Cidaridae, described by Louis Agassiz and L. R. Desor in 1846. It inhabits the eastern Pacific Ocean, with a geographic range extending from the Gulf of California down to Panama. This reef-dwelling echinoid is chara...

Cidaris cidaris is a species of sea urchin belonging to the family Cidaridae, commonly referred to as pencil urchins. First described by Carl Linnaeus in 1758, this echinoid is characterized by its thick, smooth, and blunt primary spines that resemble stubby pencils. It inhabits deep-water marine en...

Eucidaris metularia is a cidaroid sea urchin in the family Cidaridae, first described by French naturalist Jean-Baptiste Lamarck in 1816. It inhabits shallow reef environments of the Indo-Pacific region. The species bears characteristic sparse, heavy spines that are flattened and banded, typical of...

Prionocidaris baculosa is a species of cidaroid sea urchin found in the marine waters of the Indo-West Pacific region. Originally described by the French naturalist Jean-Baptiste Lamarck in 1816, this echinoid is biologically characterized by its thick, robust spines. Because the spines lack a livin...

Tylocidaris clavigera is an extinct species of cidaroid sea urchin that existed during the Cretaceous period. As a member of the pencil urchin group, it possessed a rigid test and thick, club-like spines used for protection and locomotion along the seafloor. Fossils of this species are primarily fou...

Archaeocidaris brownwoodensis is an extinct species of cidaroid sea urchin that lived during the Carboniferous period, approximately 300 million years ago. As a member of the Archaeocidaris genus, it possessed a rigid, globular internal skeleton known as a test, which was covered in prominent, detac...

Chondrocidaris gigantea is a rough-spined Indo-Pacific cidaroid urchin described by Alexander Agassiz in 1863, found around Hawaii.

Stylocidaris affinis is a species of cidaroid sea urchin, commonly known as a pencil urchin or red lance urchin. Philippi described it in 1845, and records place it in the Mediterranean and Atlantic waters, including the Caribbean, Bermuda, and the Gulf of Mexico. It occurs on seabeds from shallow c...

Dorocidaris papillata is a former scientific name for Cidaris cidaris, a cidaroid sea urchin commonly called the long-spine slate pencil urchin. The name is associated with the species' long, pencil-like primary spines and with records from Atlantic waters. It is therefore encountered mainly in olde...

Rhabdocidaris nobilis is an extinct species of cidaroid sea urchin known from the Late Jurassic Canjuers conservation Lagerstätte in Var, southeastern France. Paleontological inventories place it among the echinoid macro-invertebrates of the site and classify it within the order Cidaroida. The Canju...

Plegiocidaris coronata is an extinct species of cidaroid sea urchin known from Jurassic fossils. It belongs to the genus Plegiocidaris within the echinoid order Cidaroida, a group characterized by robust test plates and large primary spines. Museum and paleontological databases place the species in...

Goniocidaris parasol is a species of cidaroid, or pencil, sea urchin in the family Cidaridae. It was described by Fell in 1958 and is associated with deep waters around New Zealand, including the wider Chatham Islands region. The species is known as a parasol urchin because of the form of its long p...

Phyllacanthus parvispinus is a cidaroid sea urchin in the family Cidaridae, known as the eastern slate-pencil or pencil urchin. Tenison-Woods described it in 1878, and records place it on the east coast of Australia, with additional records from the Kermadec Islands and New Zealand waters. It has a...

Miocidaris coaeva is an extinct cidaroid sea urchin known from Triassic fossil material. It belongs to the cidaroid lineage, a group of echinoids characterized in living forms by prominent primary spines and a distinctive test structure. The species is significant because it represents cidaroid echi...

Histocidaris elegans is a species of cidaroid sea urchin in the family Histocidaridae. Alexander Agassiz described it in 1879, and the species has also been treated under the earlier combination Porocidaris elegans. It belongs to a group commonly known as pencil urchins, whose robust primary spines...

Ctenocidaris speciosa is an Antarctic species of sea urchin in the order Cidaroida and the family Ctenocidaridae. The species was described by Theodor Mortensen in 1910 and is associated with marine environments of the Southern Ocean, including the Weddell Sea. Its primary spines have been examined...

Goniocidaris tubaria is a species of cidaroid sea urchin in the family Cidaridae. Jean-Baptiste Lamarck described the species in 1816, and it is associated with waters around Australia and New Zealand. Like other cidaroids, it carries large primary spines on a relatively sparsely covered test; the s...

Stylocidaris lineata is a species of cidaroid sea urchin in the echinoderm class Echinoidea. Mortensen described the species in 1910, and it is recognized as one of the accepted species in the deep-water genus Stylocidaris. Cidaroid urchins are sometimes called pencil urchins because of their promin...

Austrocidaris canaliculata is a species of cidaroid sea urchin in the family Cidaridae. Alexander Agassiz described it in 1863, and the species is associated with the southern Pacific region, where cidaroid urchins are marine benthic animals with prominent primary spines. It is relevant mainly to ma...

Acanthocidaris maculicollis is an extant cidaroid sea urchin from the Indo-Pacific. De Meijere named the species in 1904 from material collected in the Sunda Islands, and the recorded collection depth was between 69 and 94 metres. The species is consequently associated with deeper shallow-marine hab...

Stylocidaris briareus is not a name I could verify in current major sea urchin lists; Stylocidaris itself was established by Mortensen in 1909.

Calocidaris micans is a marine sea urchin in the family Cidaridae, within the order Cidaroida. Like other cidaroids, it has a rigid test and prominent primary spines, features used in identifying members of the group. The species belongs to the genus Calocidaris and was described by the Danish zoolo...

Cidaris blakei is a cidaroid sea urchin associated with deep water in the Gulf of Mexico. Alexander Agassiz described the species in 1878. It is distinguished by the form of its primary spines, which have been described as paddle-like, a feature relevant to identifying this member of the pencil-urch...

Ctenocidaris nutrix is an Antarctic cidaroid described by Charles Wyville Thomson in 1876 and placed in a genus distinguished by specialized primary spines.

Porocidaris purpurata is an older scientific name for the cidaroid sea urchin now referred to as Histocidaris purpurata. The species was described by Thomson in 1872, and the two combinations can therefore appear in different taxonomic or zoological sources. It represents a living deep-water sea urc...

Cidaris rugosa is a species of cidaroid sea urchin, a marine echinoderm whose body is enclosed by a rigid, calcitic test and protected by movable spines. H. L. Clark described the species in 1907. It is of interest in zoology and skeletal-material research because echinoid tests are built from a por...