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Small Minnow Mayfly
Baetidae is a family of mayflies with about 1000 described species in 110 genera distributed worldwide. These are among the smallest of mayflies, adults rarely exceeding 10 mm in length excluding the two long slender tails and sometimes much smaller, and members of the family are often referred to as small mayflies or small minnow mayflies. Most species have long oval forewings with very few cross veins (see Comstock-Needham system) but the hindwings are usually very small or even absent. The males often have very large eyes, shaped like turrets above the head (this is known as "turbinate condition"). Baetids breed in a wide range of waters from lakes and streams to ditches and even water butts. The nymphs are strong swimmers and feed mainly on algae. The oldest members of the family date to the Late Cretaceous, with '' Myanmarella'' and '' Vetuformosa'' known from the Cenomanian aged Burmese amber, and '' Palaeocloeon'' from the Santonian aged Taimyr amber. See also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cloeon Dipterum
''Cloeon dipterum'' is a species of mayfly with a Holarctic distribution. It is the most common mayfly in ponds in the British Isles and the only ovoviviparous mayfly in Europe. Males differ from females in having turbinate eyes. Description In common with other members of the genera '' Cloeon'' and '' Procloeon'', ''C. dipterum'' has a single pair of wings. This is also reflected in the specific epithet ''dipterum'', which is from the Latin ', meaning two, and the Greek ', meaning wing, and in his original description, Carl Linnaeus stated ' ("smaller wings hardly present"). The compound eyes of ''C. dipterum'' show a striking sexual dimorphism, whereby females have lateral apposition eyes, while the males' eyes have an additional dorsal "turban-shaped" parts that function as superposition eyes. These extra eyes are thought to enable the males to locate isolated females in the mating swarm. Ecology and life cycle ''Cloeon dipterum'' is unusual among mayflies in being ovoviv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mayflies
Mayflies (also known as shadflies or fishflies in Canada and the upper Midwestern United States, as Canadian soldiers in the American Great Lakes region, and as up-winged flies in the United Kingdom) are aquatic insects belonging to the order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ... Ephemeroptera. This order is part of an ancient group of insects termed the Palaeoptera, which also contains dragonflies and damselfly, damselflies. Over 3,000 species of mayfly are known worldwide, grouped into over 400 genus, genera in 42 family (biology), families. Mayflies have ancestral traits that were probably present in the first flying insects, such as long tails and Insect wing, wings that do not fold flat over the insect morphology#Abdomen, abdomen. Their immature stages are a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George McGavin
George C. McGavin is a British entomologist, author, academic, television presenter and explorer. Background McGavin attended Daniel Stewart's College, a private school in Edinburgh, then studied Zoology at the University of Edinburgh from 1971 to 1975, followed by a PhD in entomology at Imperial College, London. He went on to teach and research at the University of Oxford. He is Honorary Research Associate at Oxford University Museum of Natural History and the Department of Zoology of Oxford University, where he lists his interests as "Terrestrial arthropods especially in tropical forests, caves and savannah. Public understanding of science. Exploration." He is also a visiting professor of entomology at the University of Derby. McGavin is a Fellow of the Linnean Society and of the Royal Geographical Society, and has several insect species named in his honour. He was previously Assistant Curator of Entomology at Oxford University's Museum of Natural History. McGavin has lec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael Chinery
Michael Chinery (born 1938, in London) is an English naturalist. He studied in Cambridge where he graduated in natural sciences and anthropology. He edits '' Cecidology'', the journal of the British Plant Gall Society The British Plant Gall Society is a voluntary organisation which encourages cecidology, the study of plant galls, in the British Isles. It was formed in 1985. Its biannual journal, ''Cecidology'', is edited by Michael Chinery. Notable people .... Books * ''Animals in the zoo'', * ''Animal communities'', * ''Britain's Plant Galls. A photographic guide'' (2011) WildGuides. Old Basing, Hampshire. *''The Complete Amateur Naturalist'', Crescent Books, New York, 1977 ISBN 0-517-66165-9 * ''Forests'', Kingfisher, London, 1992 *''Purnell's concise Encyclopedia of Nature'', Chinery is well known for his books on insects : * ''Insects of Britain and Northern Europe'', 3rd edition, Collins field guide. * ''Insects of Britain and Western Europe'', Collins Guide, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Baetidae Genera
This is a list of 111 genera in the family Baetidae, small minnow mayflies. Baetidae genera * '' Acanthiops'' * '' Acentrella'' Bengtsson, 1912 * '' Acerobiella'' * '' Acerpenna'' Waltz & McCafferty, 1987 * '' Acetrella'' * '' Adebrotus'' * '' Adnoptilum'' * '' Afrobaetodes'' * '' Afroptilum'' * '' Alainites'' * '' Americabaetis'' Kluge, 1992 * '' Anafroptilum'' Kluge, 2011 * '' Andesiops'' * '' Apobaetis'' Day, 1955 * '' Asiobaetodes'' * '' Aturbina'' * '' Baetiella'' Ueno, 1931 * '' Baetis'' Leach, 1815 * '' Baetodes'' Needham and Murphy, 1924 * '' Baetopus'' Keffermüller, 1960 * ''Barbaetis'' Waltz and McCafferty, 1985 * '' Barnumus'' * '' Bugilliesia'' * '' Bungona'' * '' Callibaetis'' Eaton, 1881 * ''Camelobaetidius'' Demoulin, 1966 * '' Centroptiloides'' * '' Centroptilum'' Eaton, 1869 * '' Chane'' * '' Cheleocloeon'' * '' Chopralla'' * '' Cloeodes'' Traver, 1938 * '' Cloeon'' Leach, 1815 * '' Corinnella'' * '' Crassabwa'' * '' Cryptonympha'' * '' Cymbal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taimyr Amber
{{Disambiguation, geo, ship ...
Taymyr or Taimyr may refer to: Places *Taymyr Peninsula, a peninsula in Siberia * Taymyr Gulf * Taymyra, a river in the Taymyr Peninsula * Lake Taymyr * Taymyr Island, an island in the Kara Sea *Taymyr Autonomous Okrug, a former federal subject of Russia Transportation * Taymyr (icebreaker), "Taymyr" ship name used for icebreakers ** ''Taymyr'' (1909 icebreaker), a steam-powered icebreaker ** ''Taymyr'' class nuclear icebreaker *** ''Taymyr'' (1987 icebreaker), a nuclear-powered shallow draft icebreaker See also * Maly Taymyr Island, an island in the Laptev Sea *Taymyrsky Dolgano-Nenetsky District Taymyrsky Dolgano-Nenetsky District (russian: Таймы́рский Долга́но-Не́нецкий райо́н) is an administrativeLaw #10-4765 and municipalLaw #2-54 district (raion), one of the forty-three in Krasnoyarsk Krai, Russia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santonian
The Santonian is an age in the geologic timescale or a chronostratigraphic stage. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series. It spans the time between 86.3 ± 0.7 mya (million years ago) and 83.6 ± 0.7 mya. The Santonian is preceded by the Coniacian and is followed by the Campanian.Gradstein ''et al.'' (2004) Stratigraphic definition The Santonian Stage was established by French geologist Henri Coquand in 1857. It is named after the city of Saintes in the region of Saintonge, where the original type locality is located. The base of the Santonian Stage is defined by the appearance of the inoceramid bivalve '' Cladoceramus undulatoplicatus''. The GSSP (official reference profile) for the base of the Santonian Stage is located near Olazagutia, Spain; it was ratified by the Subcommission on Cretaceous Stratigraphy in 2012. The Santonian's top (the base of the Campanian Stage) is informally marked by the extinction of the crinoid '' Marsup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burmese Amber
Burmese amber, also known as Burmite or Kachin amber, is amber from the Hukawng Valley in northern Myanmar. The amber is dated to around 100 million years ago, during the latest Albian to earliest Cenomanian ages of the mid-Cretaceous period. The amber is of significant palaeontological interest due to the diversity of flora and fauna contained as inclusions, particularly arthropods including insects and arachnids but also birds, lizards, snakes, frogs and fragmentary dinosaur remains. The amber has been known and commercially exploited since the first century AD, and has been known to science since the mid-nineteenth century. Research on the deposit has attracted controversy due to its alleged role in funding internal conflict in Myanmar and hazardous working conditions in the mines where it is collected. Geological context, depositional environment and age The amber is found within the Hukawng Basin, a large Cretaceous- Cenozoic sedimentary basin within northern Myanmar. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cenomanian
The Cenomanian is, in the ICS' geological timescale, the oldest or earliest age of the Late Cretaceous Epoch or the lowest stage of the Upper Cretaceous Series. An age is a unit of geochronology; it is a unit of time; the stage is a unit in the stratigraphic column deposited during the corresponding age. Both age and stage bear the same name. As a unit of geologic time measure, the Cenomanian Age spans the time between 100.5 and 93.9 million years ago (Mya). In the geologic timescale, it is preceded by the Albian and is followed by the Turonian. The Upper Cenomanian starts around at 95 Mya. The Cenomanian is coeval with the Woodbinian of the regional timescale of the Gulf of Mexico and the early part of the Eaglefordian of the regional timescale of the East Coast of the United States. At the end of the Cenomanian, an anoxic event took place, called the Cenomanian-Turonian boundary event or the "Bonarelli event", that is associated with a minor extinction event for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
