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Gracilechinus
''Gracilechinus'' is a genus of sea urchins in the family Echinidae. Description and characteristics The species in this genus are regular sea urchins, with a rounded test Test(s), testing, or TEST may refer to: * Test (assessment), an educational assessment intended to measure the respondents' knowledge or other abilities Arts and entertainment * ''Test'' (2013 film), an American film * ''Test'' (2014 film), ..., bearing the anus at the top and the mouth at the bottom. They are extremely similar to species in the genus '' Echinus'', but are differentiated by a primary tubercle on every interambulacral plate. Most species in this genus are abyssal, and live in the North Atlantic or close cold seas. Species Species in this genus include:Andreas Kroh (2015), Gracilechinus' in Kroh, A. & Mooi, R. (2015), ''World Echinoidea Database''. References {{Taxonbar, from=Q16639747 Gracilechinus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gracilechinus Acutus Test ...
''Gracilechinus'' is a genus of sea urchins in the family Echinidae. Description and characteristics The species in this genus are regular sea urchins, with a rounded test, bearing the anus at the top and the mouth at the bottom. They are extremely similar to species in the genus '' Echinus'', but are differentiated by a primary tubercle on every interambulacral plate. Most species in this genus are abyssal, and live in the North Atlantic or close cold seas. Species Species in this genus include:Andreas Kroh (2015), Gracilechinus' in Kroh, A. & Mooi, R. (2015), ''World Echinoidea Database''. References {{Taxonbar, from=Q16639747 Gracilechinus ''Gracilechinus'' is a genus of sea urchins in the family Echinidae. Description and characteristics The species in this genus are regular sea urchins, with a rounded test Test(s), testing, or TEST may refer to: * Test (assessment), an edu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gracilechinus Acutus
''Gracilechinus acutus'' is a species of sea urchin in the family Echinidae, commonly known as the white sea urchin. It is an omnivore and feeds on algae and small invertebrate Invertebrates are a paraphyletic group of animals that neither possess nor develop a vertebral column (commonly known as a ''backbone'' or ''spine''), derived from the notochord. This is a grouping including all animals apart from the chordate ...s. Description Gracilechinus acutus usually grow up to 150 mm in diameter in their adult stage. They appear commonly in a reddish to brown-red color with occasional urchins having a green color. There are vertical white stripes on the ambulacral plates. The Gracilechinus acutus have two types of spines, primary and secondary. Its primary spines are long and tapered while secondary spines are more short and thin. The spines act as a defense mechanism against predators. The area around the mouth does not contain spines, but instead have pedicellariae. Distribu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinidae
Echinidae is a family of sea urchins in the order Echinoida. Members of the family are found in the Atlantic Ocean and the Antarctic.Family Echinidae Gray, 1825. The Echinoid Directory. Retrieved 2011-08-28. Characteristics Members of the family Echinidae are characterized by having trigeminate ambulacra (quadrigeminate in one genus) with pairs of pores arranged either as vertical arcs or as a dense band. The ambulacral plates are compound. The tubercles are imperforate and do not have crenulate edges. There are few tubercles on the interambulacral plates. The buccal notches are reduced in size and, their most significant distingu ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinoida
Echinoida is an order of sea urchins in the class Echinoidea. They are distinguished from other sea urchins by simultaneously possessing both an un-sculpted test and a feeding lantern with large plates fused across the top of each pyramid. Taxonomy Order Echinoida * family Echinidae Gray, 1825 * family Echinometridae Gray, 1825 * family Parasaleniidae * family Strongylocentrotidae Gregory, 1900 Image:Paracentrotus lividus profil.JPG, '' Paracentrotus lividus'' ( Echinidae) Image:Echinometra lucunter.jpg, '' Echinometra lucunter'' ( Echinometridae) Image:Urchinhand 300.jpg, '' Strongylocentrotus franciscanus'' (Strongylocentrotidae) See also *''Colobocentrotus atratus'' - Shingle urchin *'' Echinus acutus'' - White sea urchin *''Echinus esculentus'' - Common sea urchin *'' Echinus tylodes'' *''Evechinus chloroticus Kina (''Evechinus chloroticus'') is a sea urchin endemic to New Zealand. This echinoderm belongs to the family Echinometridae and it can reach a maximum dia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
