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Psammoryctides Barbatus
Psammoryctides barbatus is a species of annelids belonging to the family Naididae. The species was first recorded in 1860 by Adolf Eduard Grube. This species is most commonly found in Europe, especially Northern Europe, but it has been recorded in places such as Northern Africa, Siberia and the Chesapeake Bay The Chesapeake Bay ( ) is the largest estuary in the United States. The bay is located in the Mid-Atlantic (United States), Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula, including parts of the Ea .... The species was discovered for the first time in Iraq in 2016 during samples of the Gharraf and Dijaila rivers. References Naididae Animals described in 1891 {{Annelid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annelids
The annelids (), also known as the segmented worms, are animals that comprise the phylum Annelida (; ). The phylum contains over 22,000 extant species, including ragworms, earthworms, and leeches. The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal vents, others in fresh water, and yet others in moist terrestrial environments. The annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms. They also have parapodia for locomotion. Most textbooks still use the traditional division into polychaetes (almost all marine), oligochaetes (which include earthworms) and leech-like species. Cladistic research since 1997 has radically changed this scheme, viewing leeches as a sub-group of oligochaetes and oligochaetes as a sub-group of polychaetes. In addition, the Pogonophora, Echiura and Sipuncula, previously regarded as separate phyla, are now regarded as sub-group ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naididae
The Naididae (including the former family Tubificidae) are a family (biology), family of clitellate oligochaete worms like the sludge worm, ''Tubifex tubifex''. They are key components of the benthic communities of many freshwater and ocean, marine ecosystems. In freshwater aquaria they may be referred to as detritus worms. Description These worms can vary in size, from centimeters to millimeters, depending on the subfamily. They are all hermaphroditic and lack a larval stage. Taxonomy Analysis of 18S rDNA sequences revealed that the traditional family Tubificidae is not monophyletic, with the traditionally circumscribed Naididae nested within tubificid taxa. To avoid paraphyly the naidid and tubificid taxa were included in a combined family, which took the name Naididae because it has priority under ''International Code of Zoological Nomenclature'' rules as the senior synonym of Tubificidae. A proposal to the International Commission on Zoological Nomenclature to suppress Naidi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adolf Eduard Grube
Adolph Eduard Grube (18 May 1812, in Königsberg – 23 June 1880, in Breslau) was a German zoologist. He served as a professor at the University of Dorpat before moving to Wrocław. Life and work Grube was born in Königsberg (Królewiec) to lawyer Karl Eduard (1783–1833) and Ernestine Luise née Mertens (1788–1857) and went to the Collegium Fridericianum before entering university. He was attracted to natural history thanks to a teacher named Bulack. At university he attended the comparative anatomy lectures of Karl Ernst von Baer and Karl Friedrich Burdach. He graduated in 1830 and continued to work on a doctorate with a dissertation on the vascular system of frogs in 1834. He then travelled to Italy and Sicily. He habilitated in 1836 at the University of Königsberg (then in Prussia) and became an associate professor in 1843. He married Józefina Schäfer, daughter of a Warsaw factory owner. In 1844 he accepted a professor position at Universität Dorpat (then in Livoni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europe
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east. Europe shares the landmass of Eurasia with Asia, and of Afro-Eurasia with both Africa and Asia. Europe is commonly considered to be Boundaries between the continents#Asia and Europe, separated from Asia by the Drainage divide, watershed of the Ural Mountains, the Ural (river), Ural River, the Caspian Sea, the Greater Caucasus, the Black Sea, and the waterway of the Bosporus, Bosporus Strait. "Europe" (pp. 68–69); "Asia" (pp. 90–91): "A commonly accepted division between Asia and Europe ... is formed by the Ural Mountains, Ural River, Caspian Sea, Caucasus Mountains, and the Black Sea with its outlets, the Bosporus and Dardanelles." Europe covers approx. , or 2% of Earth#Surface, Earth's surface (6.8% of Earth's land area), making it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Europe
The northern region of Europe has several definitions. A restrictive definition may describe northern Europe as being roughly north of the southern coast of the Baltic Sea, which is about 54th parallel north, 54°N, or may be based on other geographical factors such as climate and ecology. Climate The climate is mainly Oceanic climate (Cfb), Humid continental climate (Dfb), Subarctic climate (Dfc and Dsc) and Tundra (ET). Geography Northern Europe might be defined roughly to include some or all of the following areas: British Isles, Fennoscandia, the peninsula of Jutland, the Baltic region, Baltic plain that lies to the east, and the many islands that lie offshore from mainland northern Europe and the main European continent. In some cases, Greenland is also included, although it is only politically European, comprising part of the Kingdom of Denmark, and not considered to be geographically in Europe. The area is partly mountainous, including the northern volcanic islands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Africa
North Africa (sometimes Northern Africa) is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region. However, it is sometimes defined as stretching from the Atlantic shores of the Western Sahara in the west, to Egypt and Sudan's Red Sea coast in the east. The most common definition for the region's boundaries includes Algeria, Egypt, Libya, Morocco, Tunisia, and Western Sahara, the territory disputed between Morocco and the partially recognized Sahrawi Arab Democratic Republic. The United Nations’ definition includes all these countries as well as Sudan. The African Union defines the region similarly, only differing from the UN in excluding the Sudan and including Mauritania. The Sahel, south of the Sahara Desert, can be considered as the southern boundary of North Africa. North Africa includes the Spanish cities of Ceuta and Melilla, and the plazas de soberanía. It can also be considered to include Malta, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siberia
Siberia ( ; , ) is an extensive geographical region comprising all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has formed a part of the sovereign territory of Russia and its predecessor states since the lengthy conquest of Siberia, which began with the fall of the Khanate of Sibir in 1582 and concluded with the annexation of Chukotka in 1778. Siberia is vast and sparsely populated, covering an area of over , but home to roughly a quarter of Russia's population. Novosibirsk, Krasnoyarsk, and Omsk are the largest cities in the area. Because Siberia is a geographic and historic concept and not a political entity, there is no single precise definition of its territorial borders. Traditionally, Siberia spans the entire expanse of land from the Ural Mountains to the Pacific Ocean, with the Ural River usually forming the southernmost portion of its western boundary, and includes most of the drainage basin of the Arctic Ocean. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chesapeake Bay
The Chesapeake Bay ( ) is the largest estuary in the United States. The bay is located in the Mid-Atlantic (United States), Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula, including parts of the Eastern Shore of Maryland, the Eastern Shore of Virginia, and the state of Delaware. The mouth of the bay at its southern point is located between Cape Henry and Cape Charles (headland), Cape Charles. With its northern portion in Maryland and the southern part in Virginia, the Chesapeake Bay is a very important feature for the ecology and economy of those two states, as well as others surrounding within its watershed. More than 150 major rivers and streams flow into the bay's drainage basin, which covers parts of six states (New York (state), New York, Pennsylvania, Delaware, Maryland, Virginia, and West Virginia) and all of Washington, D.C. The bay is approximately long from its northern headwaters in the Susquehanna River to its outlet i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Al-Gharraf River
The Gharraf Canal, Shaṭṭ al-Ḥayy (Arabic: شط الحي), also known as Shaṭṭ al-Gharrāf (Arabic: شط الغرّاف) or the Hai river, is an ancient canal in Iraq that connects the Tigris at Kut al Amara with the Euphrates east of Nasiriyah. As an Ottoman (Turkish) position lay along the canal, it was one of the objectives of intense military action during the First World War, especially the siege of Kut (December 1915 to April 1916). Between 1934 and 1939, the Kut Barrage was constructed in the Tigris to control the water level of the river and to provide a constant inflow of water to the Shatt al-Hayy. First World War The Turks surrounded and besieged General Charles Townshend's British Empire forces which occupied Kut. The Gharraf River was picked by the Ottoman Army as an advantage point as part of that siege. During the siege the Ottomans repelled relief attempts by Anglo-Indian forces in the Battle of Hanna in January 1916 and the Battle of Dujaila in M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
