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Cassiduloida
Cassiduloida is an order (biology), order of sea urchins. The group was extremely diverse with many families and species during the Mesozoic, but today, only seven extant species remain. A 2019 phylogenetic systematics study by Souto et al. presented a revised classification of the cassiduloids, and hypothesised that the order probably originated in the Early Cretaceous. Description and characteristics Cassiduloids have a rounded or slightly oval appearance, and look somewhat similar to heart urchins, although they are actually more closely related to the sand dollars. They are distinguished from other sea urchins by the presence of smaller intervening areas between the main ambulacral areas on the oral surface. They have no lantern as adults, and the petaloids are poorly developed or absent. List of families and genera * family Cassidulidae (L. Agassiz and Desor, 1847) ** genus Cassidulus (Lamarck, 1801) ** genus Paralampas (Duncan & Sladen, 1882) ** genus Rhyncholampas (Ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassiduloida
Cassiduloida is an order (biology), order of sea urchins. The group was extremely diverse with many families and species during the Mesozoic, but today, only seven extant species remain. A 2019 phylogenetic systematics study by Souto et al. presented a revised classification of the cassiduloids, and hypothesised that the order probably originated in the Early Cretaceous. Description and characteristics Cassiduloids have a rounded or slightly oval appearance, and look somewhat similar to heart urchins, although they are actually more closely related to the sand dollars. They are distinguished from other sea urchins by the presence of smaller intervening areas between the main ambulacral areas on the oral surface. They have no lantern as adults, and the petaloids are poorly developed or absent. List of families and genera * family Cassidulidae (L. Agassiz and Desor, 1847) ** genus Cassidulus (Lamarck, 1801) ** genus Paralampas (Duncan & Sladen, 1882) ** genus Rhyncholampas (Ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinolampadidae
Echinolampadidae is a family of cassiduloid echinoids Sea urchins () are spine (zoology), spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard s .... Cassiduloida Echinoderm families {{Echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinoidea
Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells ( tests) of sea urchins are round and spiny, ranging in diameter from . Sea urchins move slowly, crawling with tube feet, and also propel themselves with their spines. Although algae are the primary diet, sea urchins also eat slow-moving (sessile) animals. Predators that eat sea urchins include a wide variety of fish, starfish, crabs, marine mammals. Sea urchins are also used as food especially in Japan. Adult sea urchins have fivefold symmetry, but their pluteus larvae feature bilateral (mirror) symmetry, indicating that the sea urchin belongs to the Bilateria group of animal phyla, which also comprises the chordates and the arthropods, the annelids and the molluscs, and are found in every ocean and in every climate, from the tropics to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neognathostomata
The Neognathostomata are a superorder of sea urchins. Description and characteristics They are distinguished from other sea urchins by their irregular shape and a highly modified feeding lantern. The group includes the well known sand dollars, as well as some less familiar and extinct forms. Taxonomy * familia '' Apatopygidae'' Kier, 1962 * familia '' Archiaciidae'' Cotteau & Triger, 1869 † * order '' Cassiduloida'' ** Super-familia '' Cassidulina'' (Philip, 1963b) *** familia ''Cassidulidae'' (L. Agassiz and Desor, 1847) ** Super-familia '' Neolampadina'' (Philip, 1963b) *** familia '' Neolampadidae'' (Lambert, 1918a) *** familia '' Pliolampadidae'' (Kier, 1962) † * order ''Clypeasteroida'' A.Agassiz, 1872 ("sand dollars") ** sous-order '' Clypeasterina'' *** familia ''Clypeasteridae'' L. Agassiz, 1835 *** familia '' Fossulasteridae'' Philip & Foster, 1971 † *** familia '' Scutellinoididae'' Irwin, 1995 † ** familia '' Conoclypidae'' von Zittel, 1879 † ** fami ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neolampadidae
Neolampadidae is a family of echinoderms belonging to the order Cassiduloida Cassiduloida is an order (biology), order of sea urchins. The group was extremely diverse with many families and species during the Mesozoic, but today, only seven extant species remain. A 2019 phylogenetic systematics study by Souto et al. pres .... Genera: * '' Aphanopora'' de Meijere, 1903 * †'' Daradaster'' * †'' Gitolampas'' References Cassiduloida Echinoderm families {{Echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Urchin
Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of sea urchins are round and spiny, ranging in diameter from . Sea urchins move slowly, crawling with tube feet, and also propel themselves with their spines. Although algae are the primary diet, sea urchins also eat slow-moving ( sessile) animals. Predators that eat sea urchins include a wide variety of fish, starfish, crabs, marine mammals. Sea urchins are also used as food especially in Japan. Adult sea urchins have fivefold symmetry, but their pluteus larvae feature bilateral (mirror) symmetry, indicating that the sea urchin belongs to the Bilateria group of animal phyla, which also comprises the chordates and the arthropods, the annelids and the molluscs, and are found in every ocean and in every climate, from the tropics to the po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassidulidae
Cassidulidae is a family of echinoderms belonging to the order Cassiduloida. Genera: * '' Anisopetalus'' * '' Cassidulus'' Lamarck, 1801 * '' Echinobrinus'' Ébray, 1862 * ''Eurhodia ''Eurhodia'' is a genus of echinoderms belonging to the family Cassidulidae. The species of this genus are found in Europe and Northern America. Species: *'' Eurhodia baumi'' *'' Eurhodia corralesi'' *'' Eurhodia elbana'' *'' Eurhodia falc ...'' Haime, 1853 * '' Galerolampas'' (Cotteau, 1889) * '' Glossaster'' Lambert, 1918 * '' Paralampas'' Duncan & Sladen, 1882 * '' Rhyncholampas'' Agassiz, 1869 References Cassiduloida Echinoderm families {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faujasiidae
Faujasiidae is a family of echinoderms belonging to the order Clypeasteroida Sand dollars (also known as a sea cookie or snapper biscuit in New Zealand, or pansy shell in South Africa) are species of flat, burrowing sea urchins belonging to the order Clypeasteroida. Some species within the order, not quite as flat, are k .... Genera Genera: * '' Actapericulum'' Holmes, 1995 * †'' Australanthus'' Bittner, 1892 * '' Cardiopygus'' Aziz & Badve, 2001 References Clypeasteroida Echinoderm families {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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