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Stipatosteus
''Stipatosteus'' is an extinct genus of phlyctaeniid arthrodire from the Lower Devonian of Belarus. The genus is only known from one species, being ''S. svidunovitchi'' from the Lepel Beds. ''Stipatosteus'' was the first Phlyctaenioideid to be found in the Devonian of Berlarus with only one other, '' Valentinaspis'', being described since. Discovery The material that would be later described as ''Stipatosteus'' is from the Korma 1 borehole drilled near the Zhlobin Saddle at depths of between 340.8 and 337.7 meters. These remains were collected with the remains of multiple species Acanthodians along with many pieces from indeterminate vertebrates and small fragments of invertebrates. Description ''Stipatosteus'' is estimated to only be around 40-50 mm and is only known from four pieces of the trunk armor along with a few less complete fragments. Most of these plates have tubercles with star-shaped bases which are arranged in tightly-packed rows. These tubercles would hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phlyctaeniidae
Phlyctaeniidae is an extinct family (biology), family of placoderm arthrodire fishes that lived during the Devonian period, mainly in Norway and North America. Classification Order Arthrodira Woodward, 1891 * Phlyctaenioidei Miles, 1973 ** Brachythoraci Gross, 1932 - (includes the well-known ''Dunkleosteus'', ''Dinichthys'', etc.) ** Williamsaspididae White, 1952 ** Groenlandaspididae Obruchev, 1964 ** Arctolepididae Heintz, 1937 ** Phlyctaeniidae Fowler, 1947 *** ''Aggeraspis'' Gross, 1962 *** ''Arctaspis'' Heintz, 1929 *** ''Arctolepis''? Eastman, 1908 - (may instead belong to Arctolepididae) *** ''Barwickosteus'' Young & Long, 2014 *** ''Cartieraspis'' Pageau, 1969 *** ''Diadsomaspis'' Gross, 1937 *** ''Dicksonosteus''? Goujet, 1975 - (may not belong to Phlyctaeniidae) *** ''Elegantaspis'' Heintz, 1929 - (may instead belong to trilobite genus ''Kazakhius'') *** ''Gaspeaspis'' Pageau, 1969 *** ''Grifftaylor'' Young & Long, 2014 *** ''Heintzosteus''? Goujet, 1984 - (may instead b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lower Devonian
The Early Devonian is the first of three epochs comprising the Devonian period, corresponding to the Lower Devonian series. It lasted from and began with the Lochkovian Stage , which was followed by the Pragian from and then by the Emsian, which lasted until the Middle Devonian began, . During this time, the first ammonoids appeared, descending from bactritoid nautiloids. Ammonoids during this time period were simple and differed little from their nautiloid counterparts. These ammonoids belong to the order Agoniatitida, which in later epochs evolved to new ammonoid orders, for example Goniatitida and Clymeniida. This class of cephalopod molluscs would dominate the marine fauna until the beginning of the Mesozoic The Mesozoic Era is the Era (geology), era of Earth's Geologic time scale, geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Period (geology), Periods. It is characterized by the dominance of archosaurian r ... Era. References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthrodira
Arthrodira (Greek for "jointed neck") is an order of extinct armored, jawed fishes of the class Placodermi that flourished in the Devonian period before their sudden extinction, surviving for about 50 million years and penetrating most marine ecological niches. Arthrodires were the largest and most diverse of all groups of placoderms. Description Arthrodire placoderms are notable for the movable joint between armor surrounding their heads and bodies. Like all placoderms, they lacked distinct teeth; instead, they used the sharpened edges of a bony plate on their jawbone as a biting surface. The eye sockets are covered by a bony ring, which supports the eye, a feature shared by birds and some ichthyosaurs. Early arthrodires, such as the genus '' Arctolepis'', were well-armoured fishes with flattened bodies. The largest member of this group, ''Dunkleosteus'', was a true superpredator of the latest Devonian period, reaching as much as 6 m in length. In contrast, the long-nosed '' Ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Devonian
The Early Devonian is the first of three Epoch (geology), epochs comprising the Devonian period, corresponding to the Lower Devonian Series (stratigraphy), series. It lasted from and began with the Lochkovian Stage , which was followed by the Pragian from and then by the Emsian, which lasted until the Middle Devonian began, . During this time, the first Ammonoidea, ammonoids appeared, descending from Bactritida, bactritoid Nautiloidea, nautiloids. Ammonoids during this time period were simple and differed little from their nautiloid counterparts. These ammonoids belong to the order Agoniatitida, which in later epochs evolved to new ammonoid orders, for example Goniatite, Goniatitida and Clymeniida. This class of cephalopod molluscs would dominate the marine fauna until the beginning of the Mesozoic Era. References Early Devonian, Geological epochs Devonian geochronology, *01 {{Geochronology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belarus
Belarus, officially the Republic of Belarus, is a landlocked country in Eastern Europe. It is bordered by Russia to the east and northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Belarus spans an area of with a population of . The country has a hemiboreal climate and is administratively divided into Regions of Belarus, six regions. Minsk is the capital and List of cities and largest towns in Belarus, largest city; it is administered separately as a city with special status. For most of the medieval period, the lands of modern-day Belarus was ruled by independent city-states such as the Principality of Polotsk. Around 1300 these lands came fully under the Grand Duchy of Lithuania and subsequently by the Polish–Lithuanian Commonwealth; this period lasted for 500 years until the Partitions of Poland, 1792-1795 partitions of Poland-Lithuania placed Belarus within the Belarusian history in the Russian Empire, Russian Empire for the fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepel Beds
Lyepyel or Lepel (; , ; ; ) is a town in Vitebsk Region, Belarus, located near Lyepyel Lake on the Vula River. It serves as the administrative center of Lyepyel District. Its population in the 1998 census was 19,400. As of 2024, it has a population of 17,106. Name There are three theories about the origin of the name ''Lepel''. The first is that the name 'Lepel' come from the word "lepene" which means "lake between the lime-groves". The second is that the name comes from the Belarusian word "лепей" meaning "the best place to live in". The third theory for the name ''Lepel'' is that it derives from the Belarusian word "ляпiць" meaning "well-developed pottery". History The first known mention of Lepel dates back to 1439. In the 15th century, the town belonged to the Grand Duchy of Lithuania. In 1439, thanks to efforts of a Roman Catholic priest, Kucharski, Grand Lithuanian Duke Sigismund Kestutaitis' son Michael gave Lepel to the Vitebsk Roman Catholic church. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zhlobin Saddle
Zhlobin (; ; ; ) is a town in Gomel Region, Belarus. It is located on the Dnieper River, and serves as the administrative center of Zhlobin District. It is situated from Gomel. As of 2025, it has a population of 76,304. The town is notable for being the location where steelmaker BMZ was established. BMZ is one of the largest companies in Belarus, and an important producer in the worldwide markets of steel wires and cords. The company is the main sustainer of the town's economy. History In 1939, 19% of the town's population was Jewish. During World War II, Zhlobin was occupied by the German Army from 3 July 1941 until 13 July 1944. The Nazis captured the Jews and imprisoned them in 2 different ghettos, where they suffered from starvation, disease and abuse. On April 12, 1942, 1,200 Jews were murdered in the ghettos. Demographics Sport Metallurg Zhlobin of the Belarusian Extraleague is the local pro hockey team. Industrial enterprises * OJSC "BMZ - managing company ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthodii
Acanthodii or acanthodians is an extinct class of gnathostomes (jawed fishes). They are currently considered to represent a paraphyletic grade of various fish lineages basal to extant Chondrichthyes, which includes living sharks, rays, and chimaeras. Acanthodians possess a mosaic of features shared with both osteichthyans (bony fish) and chondrichthyans (cartilaginous fish). In general body shape, they were similar to modern sharks, but their epidermis was covered with tiny rhomboid platelets like the scales of holosteians ( gars, bowfins). The popular name "spiny sharks" is because they were superficially shark-shaped, with a streamlined body, paired fins, a strongly upturned tail, and stout, largely immovable bony spines supporting all the fins except the tail—hence, "spiny sharks". However, acanthodians are not true sharks; their close relation to modern cartilaginous fish can lead them to be considered " stem-sharks". Acanthodians had a cartilaginous skeleton, bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phlyctaenius
''Phlyctaenius'' is an extinct genus of placoderm fish, which lived during the Devonian period of New Brunswick, Canada. It was named by Traquair (1890)Traquair, R. H. (1890a). Notes on the Devonian fishes of Seumenac Bay and Campbelltown in Canada. ''Geol. Mag.,'' London. 7: 15-22. as a replacement for ''Phlyctaenium'' Zittel (1879), which was preoccupied.Zittel, K. von. (1879) One species, ''P. anglicus'', was known from remains found in England and Wales Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ... and was initially described by Traquair (1890). It was moved to '' Heightingtonaspis'' when the genus was described by White (1969).White, E.I. (1969). The deepest vertebrate fossil and other arctolepid fishes. ''Biological Journal of the Linnean Society'' 1(3): 293-310 Refe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Placoderm Genera
Placoderms (from Ancient Greek πλάξ 'plax'', ''plakos''' plate' and δέρμα 'derma'''skin') are vertebrate animals of the class Placodermi, an extinct group of prehistoric fish known from Paleozoic fossils during the Silurian and the Devonian periods. While their endoskeletons are mainly cartilaginous, their head and thorax were covered by articulated armoured plates (hence the name), and the rest of the body was scaled or naked depending on the species. Placoderms were among the first jawed fish (their jaws likely evolved from the first pair of gill arches), as well as the first vertebrates to have true teeth. They were also the first fish clade to develop pelvic fins, the second set of paired fins and the homologous precursor to hindlimbs in tetrapods. 380-million-year-old fossils of three other genera, '' Incisoscutum'', '' Materpiscis'' and '' Austroptyctodus'', represent the oldest known examples of live birth. Placoderms are thought to be paraphyletic, cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
