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Dentalium (genus)
''Dentalium'' is a large genus of tooth shells or tusk shells, marine scaphopod molluscs in the family Dentaliidae. The genus contains 50 described species and about 50 extinct species.MolluscaBase eds. (2020). MolluscaBase. Dentalium Linnaeus, 1758. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=137886 on 2020-10-19 Etymology The scientific name of this genus comes from the Latin word ''dentis'', meaning ''tooth'', based on the tooth or tusk-shaped form of these molluscs. Description The mantle of ''Dentalium'' species is entirely within the shell. The foot extends from the larger end of the shell, and is used to burrow through the substrate. They position their head down in the substrate, with the apical end of the shell (at the rear of the animal's body) projecting up into the water. These molluscs live on seafloor sediment, feeding on microscopic organisms, detritus and foraminiferans. The shells are conic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silurian
The Silurian ( ) is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago (Mya), to the beginning of the Devonian Period, Mya. The Silurian is the shortest period of the Paleozoic Era. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by a few million years. The base of the Silurian is set at a series of major Ordovician–Silurian extinction events when up to 60% of marine genera were wiped out. One important event in this period was the initial establishment of terrestrial life in what is known as the Silurian-Devonian Terrestrial Revolution: vascular plants emerged from more primitive land plants, dikaryan fungi started expanding and diversifying along with glomeromycotan fungi, and three groups of arthropods ( myriapods, arachnids and hexapods) became fully terrestrialized. A significant evolutionary milestone d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dentalium Neohexagonum
Dentalium neohexagonum is a species of tusk shell, a marine scaphopod mollusk in the family Dentaliidae Dentaliidae is a family of relatively large tusk shells, scaphopod mollusks in the order Dentaliida. Genera * '' Antalis'' H. & A. Adams, 1854 * '' Coccodentalium'' Sacco, 1896 * '' Compressidentalium'' Habe, 1963 * '' Dentalium'' .... As the Latin name implies, the cross section of this shell is hexagonal; hence its common name is six-sided tusk shell. This species occurs along the central and southern California coast of the Pacific Ocean. The shells of this species are known to have been used by the Chumash people at least as early as circa 1000 AD, in the Morro Bay area. They were used as shell money rather than food. See also * Chumash people References Native American culture Scaphopods Molluscs described in 1897 {{Scaphopod-stub ... [...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 in the general area of Indonesia. It does not include the temperate and polar regions of the Indian and Pacific oceans, nor the Tropical Eastern Pacific, along the Pacific coast of the Americas, which is also a distinct marine realm. 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. 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 outwa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dentalium Aprinum
Dentalium may refer to: * ''Dentalium'' (genus), a genus of tooth shells * Dentalium (anthropology), tusk shells used in indigenous jewelry and commerce in North America {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dentalium Elephantinum
''Dentalium elephantinum'', the elephant tusk, is a species of scaphopod mollusc. Its shell is often deep green fading to white at its tip and has between eight and 17 strong ribs along its sides. Adults are about 70 mm in length with an diameter of about 11 mm at the shell aperture. It is native to Amboyna, the Philippine Islands, and the 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''; .... References {{Taxonbar, from=Q3795742 Scaphopods Molluscs described in 1758 Taxa named by Carl Linnaeus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Pitton De Tournefort
Joseph Pitton de Tournefort (5 June 165628 December 1708) was a French botanist, notable as the first to make a clear definition of the concept of genus for plants. Botanist Charles Plumier was his pupil and accompanied him on his voyages. Life Tournefort was born in Aix-en-Provence and studied at the Jesuit convent there. It was intended that he enter the Roman Catholic Church, Church, but the death of his father allowed him to follow his interest in botany. After two years collecting, he studied medicine at Montpellier, but was appointed professor of botany at the Jardin des Plantes in Paris in 1683. During this time he travelled through Western Europe, particularly the Pyrenees, where he made extensive collections. Between 1700 and 1702 he travelled through the islands of Greece and visited Constantinople, the borders of the Black Sea, Armenia, and Georgia (country), Georgia, collecting plants and undertaking other types of observations. He was accompanied by the German bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apothecaries
''Apothecary'' () is a mostly archaic term for a medical professional who formulates and dispenses '' materia medica'' (medicine) to physicians, surgeons, and patients. The modern chemist (British English) or pharmacist (British and North American English) now perform this role. In some languages and regions, the word "apothecary" is still used to refer to a retail pharmacy or a pharmacist who owns one. Apothecaries' investigation of herbal and chemical ingredients was a precursor to the modern sciences of chemistry and pharmacology. In addition to dispensing herbs and medicine, apothecaries offered general medical advice and a range of services that are now performed by other specialist practitioners, such as surgeons and obstetricians. Apothecary shops sold ingredients and the medicines they prepared wholesale to other medical practitioners, as well as dispensing them to patients. In 17th-century England, they also controlled the trade in tobacco which was imported as a me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alkali
In chemistry, an alkali (; from ar, القلوي, al-qaly, lit=ashes of the saltwort) is a basic, ionic salt of an alkali metal or an alkaline earth metal. An alkali can also be defined as a base that dissolves in water. A solution of a soluble base has a pH greater than 7.0. The adjective alkaline, and less often, alkalescent, is commonly used in English as a synonym for basic, especially for bases soluble in water. This broad use of the term is likely to have come about because alkalis were the first bases known to obey the Arrhenius definition of a base, and they are still among the most common bases. Etymology The word "alkali" is derived from Arabic ''al qalīy'' (or ''alkali''), meaning ''the calcined ashes'' (see calcination), referring to the original source of alkaline substances. A water-extract of burned plant ashes, called potash and composed mostly of potassium carbonate, was mildly basic. After heating this substance with calcium hydroxide (''slaked ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auckland War Memorial Museum
The Auckland War Memorial Museum Tāmaki Paenga Hira (or simply the Auckland Museum) is one of New Zealand's most important museums and war memorials. Its collections concentrate on New Zealand history (and especially the history of the Auckland Region), natural history, and military history. The present museum building was constructed in the 1920s in the neo-classicist style, and sits on a grassed plinth (the remains of a dormant volcano) in the Auckland Domain, a large public park close to the Auckland CBD. Auckland Museum's collections and exhibits began in 1852. In 1867 Aucklanders formed a learned society – the Auckland Philosophical Society, later the Auckland Institute. Within a few years the society merged with the museum and '' Auckland Institute and Museum'' was the organisation's name until 1996. Auckland War Memorial Museum was the name of the new building opened in 1929, but since 1996 was more commonly used for the institution as well. From 1991 to 2003 th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dentalium Nanum
''Dentalium nanum'' is a tusk shell of the family Dentaliidae, endemic to New Zealand waters. The Dentalium shell was traditionally used for decorative purposes by Māori, such as rings and necklaces, and has typically found at archaeological sites around the Coromandel Peninsula The Coromandel Peninsula ( mi, Te Tara-O-Te-Ika-A-Māui) on the North Island of New Zealand extends north from the western end of the Bay of Plenty, forming a natural barrier protecting the Hauraki Gulf and the Firth of Thames in the ....Leach, B. F. (1977). Dentalium shell in New Zealand archaeological sites. Journal of the Royal Society of New Zealand, 7(4), 473-483. References Scaphopods Molluscs described in 1873 {{scaphopod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Māori History
The history of the Māori began with the arrival of Polynesian settlers in New Zealand (''Aotearoa'' in Māori), in a series of ocean migrations in canoes starting from the late 13th or early 14th centuries. Over several centuries of isolation, the Polynesian settlers formed a distinct culture that became known as the Māori. Early Māori history is often divided into two periods: the Archaic period () and the Classic period (). Archaeological sites such as Wairau Bar show evidence of early life in Polynesian settlements in New Zealand. Many of the crops that the settlers brought from Polynesia did not grow well at all in the colder New Zealand climate, although many native bird and marine species were hunted, sometimes to extinction. An increasing population, competition for resources and changes in local climate led to social and cultural changes seen in the Classic period of Māori history. This period saw the emergence of a warrior culture and fortified villages (), along ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coromandel Peninsula
The Coromandel Peninsula ( mi, Te Tara-O-Te-Ika-A-Māui) on the North Island of New Zealand extends north from the western end of the Bay of Plenty, forming a natural barrier protecting the Hauraki Gulf and the Firth of Thames in the west from the Pacific Ocean to the east. It is wide at its broadest point. Almost its entire population lives on the narrow coastal strips fronting the Hauraki Gulf and the Bay of Plenty. In clear weather the peninsula is clearly visible from Auckland, the country's biggest city, which lies on the far shore of the Hauraki Gulf, to the west. The peninsula is part of the Thames-Coromandel District of the Waikato region. Origin of the name The Māori name for the Coromandel comes from the Māori legend of Māui and the Fish, in which the demigod uses his hook to catch a great fish from the depths of te Moana-Nui-a-Kiwa (The Pacific Ocean). ''Te Tara-O-Te-Ika-A-Māui'' means 'The spine of Māui's fish'. The spine can be understood to be t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
