|
Paradoxosisyra
''Paradoxosisyra'' is an extinct genus of lacewing in the spongefly family, Sisyridae. The genus contains a Monotypic taxon, single species, ''Paradoxosisyra groehni'' and is placed into the extinct subfamily Paradoxosisyrinae. ''Paradoxosisyra'' is known from a solitary Middle Cretaceous fossil which was found in Asia. History and classification ''Paradoxosisyra'' is known from one adult fossil, the holotype, specimen number "GPIH Typ. Kat. Nr. 4580". At the time of the genus description, the specimen was residing in the Geological-Paleontological Institute and Museum's C. Gröhn collection, part of the University of Hamburg. The described specimen is an adult female which has been preserved as an Inclusion (mineral), inclusion in a transparent chunk of Burmese amber. The amber specimens were recovered from deposits in Kachin State, in Myanmar. Burmese amber has been radiometric dating, radiometrically dated using Uranium, U-Lead, Pb isotopes, yielding an age of approximately ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sisyridae
Sisyridae, commonly known as spongeflies or spongillaflies, are a family of winged insects in the order Neuroptera. There are approximately 60 living species described, and several extinct species identified from the fossil record. Description In general appearance, the adults resemble some brown lacewings (Hemerobiidae). The forewings of spongillaflies have a span of 4–10 millimetres. The greyish or brownish wings have few cross veins except in the costal field, and most of these are not forked. The subcostal (Sc) and radial (R1) veins are fused near the wingtip. The larvae of spongillaflies look rather bizarre. Similar to those of some osmylids (Osmylidae) at first glance, they have spindly legs on a bulky thorax, long antennae, and flexible, threadlike mouthparts. However, the second and third instars carry seven pairs of jointed, movable tracheal gills beneath their plump abdomen. These gills are possessed by no other extant insect family, and readily distinguish them ... [...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 marine spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Academy Of Sciences
The Russian Academy of Sciences (RAS; russian: Росси́йская акаде́мия нау́к (РАН) ''Rossíyskaya akadémiya naúk'') consists of the national academy of Russia; a network of scientific research institutes from across the Russian Federation; and additional scientific and social units such as libraries, publishing units, and hospitals. Peter the Great established the Academy (then the St. Petersburg Academy of Sciences) in 1724 with guidance from Gottfried Leibniz. From its establishment, the Academy benefitted from a slate of foreign scholars as professors; the Academy then gained its first clear set of goals from the 1747 Charter. The Academy functioned as a university and research center throughout the mid-18th century until the university was dissolved, leaving research as the main pillar of the institution. The rest of the 18th century continuing on through the 19th century consisted of many published academic works from Academy scholars and a few Ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prehistoric Insect Genera
Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The use of symbols, marks, and images appears very early among humans, but the earliest known writing systems appeared 5000 years ago. It took thousands of years for writing systems to be widely adopted, with writing spreading to almost all cultures by the 19th century. The end of prehistory therefore came at very different times in different places, and the term is less often used in discussing societies where prehistory ended relatively recently. In the early Bronze Age, Sumer in Mesopotamia, the Indus Valley Civilisation, and ancient Egypt were the first civilizations to develop their own scripts and to keep historical records, with their neighbors following. Most other civilizations reached the end of prehistory during the following Iron Age. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous Insects
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now- extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pronotum
The prothorax is the foremost of the three segments in the thorax of an insect, and bears the first pair of legs. Its principal sclerites (exoskeletal plates) are the pronotum (dorsal), the prosternum (ventral), and the propleuron (lateral) on each side. The prothorax never bears wings in extant insects (except in some cases of atavism), though some fossil groups possessed wing-like projections. All adult insects possess legs on the prothorax, though in a few groups (e.g., the butterfly family Nymphalidae) the forelegs are greatly reduced. In many groups of insects, the pronotum is reduced in size, but in a few it is hypertrophied, such as in all beetles (Coleoptera). In most treehoppers (family Membracidae, order Hemiptera), the pronotum is expanded into often fantastic shapes that enhance their camouflage or mimicry. Similarly, in the Tetrigidae, the pronotum is extended backward to cover the flight wings, supplanting the function of the tegmina. See also *Glossary of entomolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Setae
In biology, setae (singular seta ; from the Latin word for "bristle") are any of a number of different bristle- or hair-like structures on living organisms. Animal setae Protostomes Annelid setae are stiff bristles present on the body. They help, for example, earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs make it difficult to pull a worm straight from the ground. Setae in oligochaetes (a group including earthworms) are largely composed of chitin. They are classified according to the limb to which they are attached; for instance, notosetae are attached to notopodia; neurosetae to neuropodia. Crustaceans have mechano- and chemosensory setae. Setae are especially present on the mouthparts of crustaceans and can also be found on grooming limbs. In some cases, setae are modified into scale like structures. Setae on the legs of krill and other small crustaceans help them to gather phytoplankton. It captures them and allows ... [...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] |
Prosisyrina
''Prosisyrina'' is an extinct genus of lacewing in the neuropteran family Sisyridae. The genus contains two described species, ''Prosisyrina sphinga'' and ''Prosisyrina sukachevae''. ''Prosisyrina'' is known from a group of Late Cretaceous fossils which were found in Asia. History and classification The two extinct species of ''Prosisyrina'' have been identified from adults that are preserved as inclusions in Taimyr amber. The fossils of both species were collected in a 2012 expedition to the Taimyr peninsula. The ambers of the peninsula occur in the upper levels of the Kheta Formation, which is exposed in a number of locations in the Taimyr region. Age estimates of the Kheta Formation are between the Coniacian and Santonian, and the ambers are found consistently in the upper most units, giving a Santonian age range for the inclusions. The ''Prosisyrina'' adults were collected from the Yantardakh locality, which is approximately upstream from the confluence of the Maimecha Riv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltic Amber
The Baltic region is home to the largest known deposit of amber, called Baltic amber or succinite. It was produced sometime during the Eocene epoch, but exactly when is controversial. It has been estimated that these forests created more than 100,000 tons of amber. Today, more than 90% of the world's amber comes from Kaliningrad Oblast of Russia. It is a major source of income for the region; the local Kaliningrad Amber Combine extracted 250 tonnes of it in 2014, 400 tonnes in 2015. "Baltic amber" was formerly thought to include amber from the Bitterfeld Lignite, brown coal mines in Saxony (Eastern Germany). Bitterfeld amber was previously believed to be only 20–22 million years old (Miocene), but a comparison of the animal inclusions in 2003 suggested that it was possibly Baltic amber that was redeposited in a Miocene deposit. Further study of insect taxa in the ambers has shown Bitterfeld amber to be from the same forest as the Baltic amber forest, but separately deposited f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
