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Echinoecus
''Echinoecus'' is a genus of crabs that live in association with sea urchins. Formerly considered monotypic, the genus is now thought to contain three species: *''Echinoecus nipponicus'' Miyake, 1939 – Japan, on ''Heliocidaris crassispina'' (Echinometridae) and ''Pseudocentrotus depressus'' (Strongylocentrotidae) *'' Echinoecus pentagonus'' (A. Milne-Edwards, 1879) – East Africa and Red Sea to Hawaii and French Polynesia, on ''Diadema savignyi'', '' D. setosum'', ''Echinothrix calamaris'' and '' E. diadema'' (Diadematidae), ''Heterocentrotus mammillatus'' (Echinometridae) and ''Pseudocentrotus depressus'' (Strongylocentrotidae) *''Echinoecus sculptus'' (Ward, 1934) – Christmas Island, on '' Colobocentrotus atratus'' (Echinometridae The Echinometridae are a family of sea urchins in the class Echinoidea. Characteristics All Echinometridae have imperforate tubercles and compound ambulacral plates. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinoecus Pentagonus
The "sea urchin crab" ''Echinoecus pentagonus'' is a species of crab in the family Pilumnidae found from the Red Sea and East Africa to French Polynesia and the Hawaiian Islands. This crab is a parasite that lives in the rectum of a sea urchin. In Hawaii, it chooses only ''Echinothrix calamaris'', leaving few of these urchins unpopulated. Its curved and pointed carapace A carapace is a Dorsum (biology), dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tor ... reaches only in width. Taxonomic synonyms of ''E. pentagonus'' include: *''Echinoecus klunzingeri'' Miyake, 1939 *''Echinoecus pentagonus'' Rathbun, 1894 *''Echinoecus rathbunae'' Miyake, 1939 *''Eumedon convictor'' Bouvier & Seurat, 1906 *''Eumedon pentagonus'' A. Milne-Edwards, 1879 *''Eumedonus petiti'' Gravier, 1922 *''Liomedon pentagonus'' Klunzinger, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinothrix Calamaris
''Echinothrix calamaris'', known commonly as the banded sea urchin or double spined urchin among other vernacular names, is a species of sea urchin in the family Diadematidae. Description The Banded sea urchin has a slightly oval test (shell), reaching a diameter of about 5 cm. Like almost all the Diadematidae (but it is in ''Echinothrix calamaris'' that it is most obvious) it has two different sets of spines, shorter and slender closed spines which are going from yellow to dark (through brown) in colour and can deliver a nasty sting, and longer and thicker spines that are often banded with light and dark colour (but sometimes all dark or all white), and reaching 10 to 15 cm in length. These radiolas can be blunt, and are hollow. The spines are grouped so as to let appear five naked zones on the central part of the test, in a star pattern (called "iridophores"): this pattern can be colored, often in blue. The anal papilla is big, more or less translucent and very obvious ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pilumnoidea
Pilumnoidea is a superfamily of crabs, whose members were previously included in the Xanthoidea. The three families are unified by the free articulation of all the segments of the male crab's abdomen and by the form of the gonopods. The earliest fossils assigned to this group are of Eocene age. Classification Pilumnidae is by far the largest of the three families, with 73 of the 78 genera: ; Pilumnidae Samouelle, 1819 * Subfamily Calmaniinae Števčić, 1991 ** '' Calmania'' Laurie, 1906 * Subfamily Pilumninae Samouelle, 1819 ** '' Actumnus'' Dana, 1851 ** '' Aniptumnus'' Ng, 2002 ** '' Bathypilumnus'' Ng & L. W. H. Tan, 1984 ** '' Benthopanope'' Davie, 1989 ** '' Budapanopeus'' † Müller & Collins, 1991 ** '' Cryptopilumnus'' Hsueh, Huang & Ng, 2009 ** '' Danielum'' Vázquez-Bader & Gracia, 1995 ** '' Eohalimede'' † Blow & Manning, 1996 ** '' Eopilumnus'' † Beschin ''et al.'', 2002 ** '' Eumorphactaea'' † Bittner, 1875 ** '' Eurycarcinus'' A. Milne-Edw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans an archipelago of 6852 islands covering ; the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa. Tokyo is the nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto. Japan is the eleventh most populous country in the world, as well as one of the most densely populated and urbanized. About three-fourths of the country's terrain is mountainous, concentrating its population of 123.2 million on narrow coastal plains. Japan is divided into 47 administrative prefectures and eight traditional regions. The Greater Tokyo Ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterocentrotus Mammillatus
''Heterocentrotus mamillatus'', commonly known as the slate pencil urchin, red slate pencil urchin, or red pencil urchin, is a species of tropical sea urchin from the Indo-Pacific region. Description This species is a large sea urchin, with some specimens reaching over 8 cm in diameter, with spikes up to 10 cm. Most specimens are bright red, but brown and purple colorations are also seen. The spines may have a different color from the body. Spines have a white ring at their stem and have alternating light and dark rings. The spines are rounded to triangular in cross-section and taper towards the tip. Surprisingly during the night the red spines turn into a chalky pink. Specimens from Hawai‘i tend to have bright red spines, while specimens from other parts of the Pacific may have yellowish or brown spines. Other variations of ''H. mammillatus'', such as those living on the Ogasawara Islands, have slimmer spines instead of the species' characteristic thick, broad s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diadematidae
The Diadematidae are a family of sea urchins. Their tests are either rigid or flexible and their spines are long and hollow. * '' Astropyga'' Gray, 1825 **''Astropyga radiata'' ( Leske, 1778), extant **''Astropyga pulvinata'' ( Lamarck, 1816), extant **''Astropyga magnifica'' (Clark, 1934), extant *''Centrostephanus'' Peters, 1855 **''Centrostephanus asteriscus'' (Agassiz & Clark, 1907), extant **''Centrostephanus coronatus'' ( Verrill, 1867), extant **''Centrostephanus fragile'' ( Wiltshire in Wright, 1882), Santonian, Maastrichtian, Danian **''Centrostephanus longispinus'' (Philippi, 1845), extant **''Centrostephanus nitidus'' ( Koehler, 1927), extant **''Centrostephanus rodgersii'' (Agassiz, 1863), extant *''Chaetodiadema'' Mortensen, 1903 **''Chaetodiadema granulatum'' ( Mortensen, 1903), extant **''Chaetodiadema keiense'' ( Mortensen, 1903), extant **''Chaetodiadema tuberculatum'' (Clark, 1909), extant *'' Diadema'' Gray, 1825 **'' Diadema palmeri'' (Baker, 1967), ext ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinothrix Diadema
The diadema urchin or blue-black urchin (''Echinothrix diadema'') is a species of tropical sea urchin, member of the Diadematidae family. Description and characteristics ''Echinothrix diadema'' is a long spined urchin. With its spines, the typical diameter is . The internal organs are enclosed in the test, covered by a thin dermis and epidermis. It is generally black or blue-black in colour, and always dark (the spines show a blue sheen in the light). The spines are closed at the tip; the anal sac is small and dark. It differs from '' Echinothrix calamaris'' in that the spines are not banded, except in juveniles, and that its anal sac is small and hardly visible, and the spines show a blue sheen (whereas dark morphs of ''E. calamaris'' show a greenish tinge). Another similar species is ''Diadema setosum'', which has longer spines and smaller test, the distinguishing feature being an orange ring around anal sac. Image:Echinothrix calamaris, jeune individu.jpg, Young indiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diadema Setosum
''Diadema setosum'' is a species of long-spined sea urchin belonging to the family Diadematidae. It is a typical sea urchin, with extremely long, hollow spines that are mildly venomous. ''D. setosum'' differs from other '' Diadema'' with five, characteristic white dots that can be found on its body. The species can be found throughout the Indo-Pacific region, from Australia and Africa to Japan and the Red Sea. Despite being capable of causing painful stings when stepped upon, the urchin is only slightly venomous and does not pose a serious threat to humans. Description As a member of the class Echinoidea, the anatomy of ''Diadema setosum'' is that of a typical sea urchin. All of the animal's internal organs are enclosed within the spherical, black test that is essentially the body of the organism. However, the body is not perfectly spherical – ''Diadema'' tests are slightly dorso-ventrally compressed. Protruding outwards from the central body are the long spines iconic of a sea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diadema Savignyi
''Diadema savignyi'' is a species of long-spined sea urchin belonging to the family Diadematidae. Common names include long-spined sea urchin, black longspine urchin and the banded diadem. It is native to the east coast of Africa, the Red Sea, the Indian Ocean and western Pacific Ocean. It was first described in 1829 by the French naturalist Jean Victoire Audouin. The specific epithet honours the French zoologist Marie Jules César Savigny who described many new marine species from the Mediterranean Sea and Red Sea. The type locality is Mauritius. Description ''Diadema savignyi'' has a usually black, spherical, slightly-flattened test up to about in diameter. The brittle, thin, hollow spines grow in tufts and can be as long as . They are usually black but can also be grey, dark brown or purple. They may be banded with lighter and darker shades in juveniles and the occasional individual sea urchin is completely white. ''Diadema savignyi'' is similar in appearance to the closely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Polynesia
)Territorial motto: ( en, "Great Tahiti of the Golden Haze") , anthem = , song_type = Regional anthem , song = "Ia Ora 'O Tahiti Nui" , image_map = French Polynesia on the globe (French Polynesia centered).svg , map_alt = Location of French Polynesia , map_caption = Location of French Polynesia (circled in red) , mapsize = 290px , subdivision_type = Sovereign state , subdivision_name = , established_title = Protectorate proclaimed , established_date = 9 September 1842 , established_title2 = Territorial status , established_date2 = 27 October 1946 , established_title3 = Collectivity status , established_date3 = 28 March 2003 , established_title4 = Country status (nominal title) , established_date4 = 27 February 2004 , official_languages = French , regional_languages = , capital = Papeete , coordinates = , largest_city = Fa'a'ā , demonym = French Polynesian , ethnic_groups = 66.5% unmixed Polynesians7.1% mixed Polynesians9.3% Demis11 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawaii
Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only state geographically located within the tropics. Hawaii comprises nearly the entire Hawaiian archipelago, 137 volcanic islands spanning that are physiographically and ethnologically part of the Polynesian subregion of Oceania. The state's ocean coastline is consequently the fourth-longest in the U.S., at about . The eight main islands, from northwest to southeast, are Niihau, Kauai, Oahu, Molokai, Lānai, Kahoolawe, Maui, and Hawaii—the last of these, after which the state is named, is often called the "Big Island" or "Hawaii Island" to avoid confusion with the state or archipelago. The uninhabited Northwestern Hawaiian Islands make up most of the Papahānaumokuākea Marine National Monument, the United States' largest prot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Sea
The Red Sea ( ar, البحر الأحمر - بحر القلزم, translit=Modern: al-Baḥr al-ʾAḥmar, Medieval: Baḥr al-Qulzum; or ; Coptic: ⲫⲓⲟⲙ ⲛ̀ϩⲁϩ ''Phiom Enhah'' or ⲫⲓⲟⲙ ⲛ̀ϣⲁⲣⲓ ''Phiom ǹšari''; Tigrinya: ቀይሕ ባሕሪ ''Qeyih Bahri''; ) is a seawater inlet of the Indian Ocean, lying between Africa and Asia. Its connection to the ocean is in the south, through the Bab el Mandeb strait and the Gulf of Aden. To its north lie the Sinai Peninsula, the Gulf of Aqaba, and the Gulf of Suez (leading to the Suez Canal). It is underlain by the Red Sea Rift, which is part of the Great Rift Valley. The Red Sea has a surface area of roughly 438,000 km2 (169,100 mi2), is about 2250 km (1398 mi) long, and — at its widest point — 355 km (220.6 mi) wide. It has an average depth of 490 m (1,608 ft), and in the central ''Suakin Trough'' it reaches its maximum depth of . The Red Sea also ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
