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Cephalaspis Tenuicornis
''Cephalaspis'' (from , 'head' and , 'shield') is a possibly monotypic taxon, monotypic Genus (biology), genus of extinct Osteostraci, osteostracan agnathan vertebrate. It was a trout-sized detritivorous fish that lived in the early Devonian. Description Like its relatives, ''Cephalaspis'' was heavily armored, presumably to defend against predatory placoderms and eurypterids, as well as to serve as a source of calcium for metabolic functions in calcium-poor freshwater environments. It had sensory patches along the rim and center of its head shield, which were used to sense for worms and other burrowing organisms in the mud. Diet Because its mouth was situated directly beneath its head, ''Cephalaspis'' was thought of as being a bottom-feeder, akin to a heavily armoured catfish or sturgeon. It moved its plow-like head from side to side, ''Cephalaspis'' easily stirring sand and dust into the water, along with revealing the hiding places of its prey, digging up worms or crustacean ... [...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] |
Pteraspis
''Pteraspis'' (from 'wing' or 'fin' and 'shield') is an extinct genus of pteraspidid heterostracan jawless fish. It lived from the Lochkovian to Eifelian epochs of the Devonian period in what is now Brazil (Eifelian Maecuru Formation), Britain (Lochkovian Ditton Group), Ukraine (Lochkovian Ivane Suite, Pragian Babin Sandstone) and Belgium. Description Like other heterostracan fishes, ''Pteraspis'' had a protective armored plating covering the front of its body. Though lacking fins other than its lobed tail, it is thought to have been a good swimmer due to stiff, wing-like protrusions derived from the armoured plates over its gills. This, along with the horn-like rostrum, made ''Pteraspis'' very streamlined in shape, which is good for swimming. ''Pteraspis'' also had some stiff spikes on its back, possibly an additional form of protection against predators. It is thought to have fed from shoals of plankton just under the ocean surface. Some records are found in associ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zychaspis
''Zychaspis'' is an extinct genus of Devonian jawless fishes. Two species of this genus, ''Z. bucovinensis'' and ''Z. elegans'' are known from the Devonian The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian per ...-aged rocks of Ukraine. The genus name, ''Zychaspis'', was named as a tribute to palaeontologist Władysław Zych (1899 – 1981). ''Z. bucovinensis'' is found only at Babin (Bobince), Podoli abin Sandstone(Devonian of Ukraine). ''Z. elegans'' (which was once known as '' Cephalaspis elegans'' (Balabai, 1962)) is found on the Podolian plateau.On the cephalaspid fauna of the Podolian plateau. PP Balabai - aukovi zapysky Naukovo-pryodo-znavcogomuzeâ AN URSR, L'vov, 1962 References External links * Osteostraci genera {{devonian-jawless-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Podolian
Podolia or Podillia is a historic region in Eastern Europe located in the west-central and southwestern parts of Ukraine and northeastern Moldova (i.e. northern Transnistria). Podolia is bordered by the Dniester River and Boh River. It features an elongated plateau and fertile agricultural land covering an area of . The two main rivers serve as important trade channels. Podolia is known for its cherries, mulberries, melons, gourds, and cucumbers. The region has a rich history, dating back to the Neolithic, with various tribes and civilizations occupying it over time. It became part of the Kingdom of Galicia–Volhynia, the Golden Horde, the Kingdom of Poland, the Grand Duchy of Lithuania, the Ottoman Empire, the Habsburg monarchy of Austria, and the Russian Empire. In the 20th century, Podolia underwent various political changes, with both the Second Polish Republic and the Soviet Union controlling parts of it at different times. Podolian culture is renowned for its folk icon-pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalaspis 2
''Cephalaspis'' (from , 'head' and , 'shield') is a possibly monotypic genus of extinct osteostracan agnathan vertebrate. It was a trout-sized detritivorous fish that lived in the early Devonian. Description Like its relatives, ''Cephalaspis'' was heavily armored, presumably to defend against predatory placoderms and eurypterids, as well as to serve as a source of calcium for metabolic functions in calcium-poor freshwater environments. It had sensory patches along the rim and center of its head shield, which were used to sense for worms and other burrowing organisms in the mud. Diet Because its mouth was situated directly beneath its head, ''Cephalaspis'' was thought of as being a bottom-feeder, akin to a heavily armoured catfish or sturgeon. It moved its plow-like head from side to side, ''Cephalaspis'' easily stirring sand and dust into the water, along with revealing the hiding places of its prey, digging up worms or crustaceans hidden in the mud and algae, as well as sif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
