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Diloma
''Diloma'' is a genus of medium-sized sea snails, marine gastropod mollusks in the family Trochidae, the top snails.Bouchet, P. (2010). Diloma Philippi, 1845. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=391149 on 2011-07-02 There is also a genus ''Diloma'', F.H.Wind & P.Cepek, 1979 a genus of phytoplankton in the class Prymnesiophyceae Description The solid shell is imperforate and depressed globose. It is slate-colored or black, sometimes (especially if worn) reddish or brownish. The conic spire is short. The apex is acute, usually reddish. The sutures are linear. The five whorls are slightly convex, rapidly increasing and spirally obsoletely striate. The body whorl is usually depressed or subconcave below the suture. The base of the shell is rounded, eroded and iridescent in front of the aperture. The aperture is huge, oblique iridescent. The outer lip is rather thin, not black-margined within; but bordered by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diloma Subrostrata
''Diloma subrostratum'', common name the mudflat top shell, is a species of small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Marshall, B.; Bouchet, P. (2016). Diloma subrostratum (Gray, 1835). In: MolluscaBase (2016). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=546863 on 2016-11-26 Description The length of the adult shell of this species varies between 11 mm and 32 mm. The solid, conical shell is suborbicular. It is often more or less black, with close wavy longitudinal yellow lines. The spire is short with five whorls. The last whorl is large, rounded, with its hinder part with three to six spiral keels. The axis is imperforated. The inside of the aperture is smooth and silvery. Distribution This common estuarine species is endemic to New Zealand, occurring in the North and South Islands, and in Stewart Island Stewart Island (, ' glowing skies', officially St ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diloma Zelandica
''Diloma zelandicum'' is a species of sea snail, a marine gastropod mollusc in the family Trochidae, the top snails or top shells.Bouchet, P. (2010). Diloma zelandicum(Quoy & Gaimard, 1834). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=546852 on 2011-07-03 Description The height of the shell attains 20 mm, its diameter 25 mm. The imperforate shell is depressed and has an orbiculate-conoidal shape. The six whorls are separated by impressed sutures. The whorls are slightly convex, greenish-black and shining. They are spirally sulcate, the sulci about 5 on the penultimate whorl. The body whorl is much dilated, slightly depressed above, rounded in the middle, very obliquely striate, obsoletely transversely sulcate, slightly convex beneath. The aperture is subrhomboidal and lirate within. The acute lip is green. The basal margin is thickened within. The white columella is compressed and arcuate. The columellar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diloma Aethiops
''Diloma aethiops'', whose common names include scorched monodont, spotted black topshell, and in the Māori language pūpū, pūpū-mai, or māihi is a species of small sea snail, a marine gastropod mollusc in the family Trochidae, subfamily Monodontinae.Bouchet, P. (2013). Diloma aethiops (Gmelin, 1791). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=546856 on 2014-03-17 Description The size of the shell varies between 15 mm and 30 mm. The thick, solid, imperforate shell has a depressed conical shape. It is blackish, dotted upon the ribs with yellow or white. The conic spire is more or less depressed with an acute apex. The five whorls are spirally strongly ridged. The ridges are nodulous and number three on the penultimate whorl. The interstices are spirally striate. The body whorl is depressed, angulate at the periphery, and concentrically lirate below. The lirae are coarsely granulose, about 5 in number ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diloma Concamerata
''Diloma concameratum'', common name the speckled periwinkle, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Bouchet, P. (2012). ''Diloma concameratum'' (Wood, 1828). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=546858 on 2012-11-23 Description The height of the shell varies between 15 mm and 27 mm, the diameter between 23 mm and 25 mm. The very thick and solid, imperforate shell has a globose-conical shape and is generally rather depressed. Its color is yellow and black, tessellated or longitudinally striped, sometimes the black, sometimes the yellow predominating. The spire is a very short cone. The apex is usually perfect and acute, often ruddy. The five whorls are slightly convex. The increase very rapidly in size. They are spirally strongly costate, the ridges 13 or 14 in number on the last whorl . The body whorl slightly descends at the apertur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diloma Radula
''Diloma radula'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Bouchet, P. (2012). ''Diloma radula'' (Philippi, 1849). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=546853 on 2012-11-23 Description The size of the shell varies between 5 mm and 12 mm. The imperforate, small, thick and solid shell has a globose-conic shape. It is blackish and unicolored. The conical spire is elevated or rather depressed. The acute apex is flesh colored. The five whorls are slightly convex. They are spirally encircled by regularly granose subequal lirae. These number about 6 on the penultimate whorl, 11 to 13 on the last whorl. The body whorl is globose, convex below and has a rounded periphery. The aperture is rounded. The outer lip is slightly crenated by the spiral ribs, dark-margined, and beveled to an edge. It is thickened by a heavy white rim inside, which is slightly no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diloma Samoaense
''Diloma Samoaense'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. Diloma Samoaense got its name from the Samoan islands where it first originated Description The size of the shell varies between 8 mm and 11 mm. Distribution This marine species occurs off Tutuila Tutuila is the largest and most populous island of American Samoa and is part of the archipelago of the Samoan Islands. It is the third largest island in the Samoan Islands chain of the Central Pacific. It is located roughly northeast of Brisba ..., the largest and the main island of American Samoa in the archipelago of Samoan Islands. References External links * samoaense Fauna of American Samoa Tutuila Gastropods described in 2003 {{Trochidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the Aperture (mollusc), aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the Mantle (mollusc), mantle. The calcareous central layer, ostracum, is typically made of calcium carbonate (CaCO3) precipitated into an organic matrix ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Friedrich Gmelin
Johann Friedrich Gmelin (8 August 1748 – 1 November 1804) was a German natural history, naturalist, chemist, botanist, entomologist, herpetologist, and malacologist. Education Johann Friedrich Gmelin was born as the eldest son of Philipp Friedrich Gmelin in 1748 in Tübingen. He studied medicine under his father at University of Tübingen and graduated with a Master's degree in 1768, with a thesis entitled: ', defended under the presidency of Ferdinand Christoph Oetinger, whom he thanks with the words '. Career In 1769, Gmelin became an adjunct professor of medicine at University of Tübingen. In 1773, he became professor of philosophy and adjunct professor of medicine at University of Göttingen. He was promoted to full professor of medicine and professor of chemistry, botany, and mineralogy in 1778. He died in 1804 in Göttingen and is buried there in the Albanifriedhof, Albani cemetery with his wife Rosine Louise Gmelin (1755–1828, née Schott). Johann Friedrich Gm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogram
A phylogenetic tree or phylogeny is a graphical representation which shows the evolutionary history between a set of species or taxa during a specific time.Felsenstein J. (2004). ''Inferring Phylogenies'' Sinauer Associates: Sunderland, MA. In other words, it is a branching diagram or a tree showing the evolutionary relationships among various biological species or other entities based upon similarities and differences in their physical or genetic characteristics. In evolutionary biology, all life on Earth is theoretically part of a single phylogenetic tree, indicating common ancestry. Phylogenetics is the study of phylogenetic trees. The main challenge is to find a phylogenetic tree representing optimal evolutionary ancestry between a set of species or taxa. Computational phylogenetics (also phylogeny inference) focuses on the algorithms involved in finding optimal phylogenetic tree in the phylogenetic landscape. Phylogenetic trees may be rooted or unrooted. In a ''rooted'' phy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea in the south. The Japanese archipelago consists of four major islands—Hokkaido, Honshu, Shikoku, and Kyushu—and List of islands of Japan, thousands of smaller islands, covering . Japan has a population of over 123 million as of 2025, making it the List of countries and dependencies by population, eleventh-most populous country. The capital of Japan and List of cities in Japan, its largest city is Tokyo; the Greater Tokyo Area is the List of largest cities, largest metropolitan area in the world, with more than 37 million inhabitants as of 2024. Japan is divided into 47 Prefectures of Japan, administrative prefectures and List of regions of Japan, eight traditional regions. About three-quarters of Geography of Japan, the countr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Zealand
New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of island countries, sixth-largest island country by area and lies east of Australia across the Tasman Sea and south of the islands of New Caledonia, Fiji, and Tonga. The Geography of New Zealand, country's varied topography and sharp mountain peaks, including the Southern Alps (), owe much to tectonic uplift and volcanic eruptions. Capital of New Zealand, New Zealand's capital city is Wellington, and its most populous city is Auckland. The islands of New Zealand were the last large habitable land to be settled by humans. Between about 1280 and 1350, Polynesians began to settle in the islands and subsequently developed a distinctive Māori culture. In 1642, the Dutch explorer Abel Tasman became the first European to sight and record New Zealand. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indo-Pacific
The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the seas connecting the two. The term is especially useful in marine biology, ichthyology, and similar fields, since many marine habitats are continuously connected from Madagascar to Japan and Oceania, and a number of species occur over that range, but are not found in the Atlantic Ocean. As a distinct marine realm, the region has an exceptionally high species richness, with the world's highest species richness being found in at its heart in the Coral Triangle, and a remarkable gradient of decreasing species richness radiating outward in all directions. The region includes over 3,000 species of fish, compared with around 1,200 in the next richest marine region, the Western Atlantic, and around 500 species of reef building corals, compar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
