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Wiedopterus
''Wiedopterus'' is a genus of eurypterid, an extinct group of aquatic arthropods. The type and only species of ''Wiedopterus'', ''W. noctua'', is known from deposits of Early Devonian age in Germany. The generic name derives from the Wied river, which runs near the site of the initial discovery, and the species name, ''noctua'', derives from Latin ''noctua'' (owl) which refers to the superficial resemblance of the carapace (head plate) to an owl. A small eurypterid, the type and only known specimen of ''Wiedopterus'' does not preserve the appendages or the underside of the body, making certain classification of the genus impossible. As such, it is formally classified as Eurypterina ''incertae sedis'' (indicating uncertain placement within the Eurypterina suborder of eurypterids). Though not yet formally classified as such, ''Wiedopterus'' was suggested to probably belong to the Adelophthalmidae family on account of various features, including its general body outline, the positio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurypterina
Eurypterina is one of two suborders of eurypterids, an extinct group of chelicerate arthropods commonly known as "sea scorpions". Eurypterine eurypterids are sometimes informally known as "swimming eurypterids". They are known from fossil deposits worldwide, though primarily in North America and Europe. Seventy-five percent of eurypterid species are eurypterines; this represents 99% of specimens. The superfamily Pterygotioidea is the most species-rich clade, with 56 species, followed by the Adelophthalmoidea with 43 species; as sister taxa, they comprise the most derived eurypterines. Pterygotioidea includes the pterygotids, which are the only eurypterids known to have a cosmopolitan distribution. Though more numerous both in specimens and taxa, the eurypterines have the shorter temporal range of the two eurypterid suborders. They first appeared around the same time as the Stylonurina in the Middle Ordovician. The suborder faced a slow extinction during the Middle and Late Devo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emsian
The Emsian is one of three faunal stages in the Early Devonian Epoch. It lasted from 407.6 ± 2.6 million years ago to 393.3 ± 1.2 million years ago. It was preceded by the Pragian Stage and followed by the Eifelian Stage. It is named after the Ems river in Germany. The GSSP is located in the Zinzil'ban Gorge in the Kitab State Geological Reserve of Uzbekistan, above the contact with the Madmon Formation. In North America the Emsian Stage is represented by Sawkill or Sawkillian time. Biological events During this period, earliest known agoniatitid ammonoid fossils began appearing within this stage after first appearing in previous stage and began to evolutionarily radiate within this stage, in which a new ammonoid order Goniatitida rises in the end of Zlichovian stage (Siberian representation; corresponds to early Eifelian and after the end of Early Devonian, before 391.9 mya). Later agoniatitid ammonoids would die out in the Taghanic event in the upper middle Givetian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tergite
A ''tergum'' (Latin for "the back"; plural ''terga'', associated adjective tergal) is the dorsal ('upper') portion of an arthropod segment other than the head. The anterior edge is called the 'base' and posterior edge is called the 'apex' or 'margin'. A given tergum may be divided into hardened plates or sclerites commonly referred to as tergites. In a thoracic segment, for example, the tergum may be divided into an anterior notum and a posterior scutellum. Lateral extensions of a tergite are known as paranota (Greek for "alongside the back") or ''carinae'' (Latin for "keel"), exemplified by the flat-backed millipedes of the order Polydesmida. Kinorhynchs have tergal and sternal plates too, though seemingly not homologous with those of arthropods. Tergo-tergal is a stridulatory mechanism in which fine spines of the abdominal tergites are rubbed together to produce sound. This process is known as abdominal telescoping. Examples File:Andrena spiraeana abdomen.jpg , Abdominal t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strobilopterus
''Strobilopterus'' is a genus of prehistoric eurypterid of the family Strobilopteridae. The genus contains four species, two from the Devonian of Wyoming, United States (''S. princetonii'' and ''S. proteus''), one from the Devonian of Ohio, United States (''S. richardsoni'') and one from the Silurian of Estonia (''S. laticeps'').Dunlop, J. A., Penney, D. & Jekel, D. 2015. A summary list of fossil spiders and their relatives. In World Spider Catalog. Natural History Museum Bern, online at http://wsc.nmbe.ch, version 16.0 http://www.wsc.nmbe.ch/resources/fossils/Fossils16.0.pdf (PDF). Description ''Strobilopterus'' was a large strobilopterid eurypterid, with adults of the species ''S. proteus'' measuring approximately 15 to 20 centimetres in length. The carapace of ''Strobilopterus'' was wide and semicircular in shape, with the lateral eyes lunate to crescentic with the palpebral lobe between the central and centrimesial sectors. The first pair of appendages were small, lacking ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buffalopterus
''Buffalopterus'' is a prehistoric eurypterid from the Silurian-aged Bertie Formation of New York and Ontario. The genus contains one species, ''B. pustulosus''. It is closely related to ''Strobilopterus'', but differs primarily by having a bizarre, globular telson (which is otherwise sword-like or spine-like in other eurypterids), and in size, being estimated to be at least 1 meter in length.Some Eurypterida from the Ordovician and Silurian of New York Erik N. Kjellesvig-Waering and Carol A. Heubusch See also * List of eurypterids This list of eurypterid genera is a comprehensive listing of all genera that have ever been included in the order Eurypterida, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now conside ... References Eurypteroidea Silurian eurypterids Eurypterids of North America Fossils of Canada Paleontology in Ontario Bertie Formation Fossil taxa described in 1962 {{eurypterid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurypterus
''Eurypterus'' ( ) is an extinct genus of eurypterid, a group of organisms commonly called "sea scorpions". The genus lived during the Silurian period, from around 432 to 418 million years ago. ''Eurypterus'' is by far the most well-studied and well-known eurypterid. ''Eurypterus'' fossil specimens probably represent more than 95% of all known eurypterid specimens. There are fifteen species belonging to the genus ''Eurypterus'', the most common of which is ''E. remipes'', the first eurypterid fossil discovered and the state fossil of New York. Members of ''Eurypterus'' averaged at about in length, but the largest individual discovered was estimated to be long. They all possessed spine-bearing appendages and a large paddle they used for swimming. They were generalist species, equally likely to engage in predation or scavenging. Discovery The first fossil of ''Eurypterus'' was found in 1818 by S. L. Mitchill, a fossil collector. It was recovered from the Bertie Formation of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silurian
The Silurian ( ) is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the shortest period of the Paleozoic Era. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by a few million years. The base of the Silurian is set at a series of major Ordovician–Silurian extinction events when up to 60% of marine genera were wiped out. One important event in this period was the initial establishment of terrestrial life in what is known as the Silurian-Devonian Terrestrial Revolution: vascular plants emerged from more primitive land plants, dikaryan fungi started expanding and diversifying along with glomeromycotan fungi, and three groups of arthropods (myriapods, arachnids and hexapods) became fully terrestrialized. A significant evolutionary milestone during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erieopterus
''Erieopterus'' is a genus of prehistoric eurypterid found in Silurian to Devonian-aged marine strata of Europe and North America. The genus contains eight species from the Silurian to the Devonian, recovered from both North America and Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ....Dunlop, J. A., Penney, D. & Jekel, D. 2015. A summary list of fossil spiders and their relatives. In World Spider Catalog. Natural History Museum Bern, online at http://wsc.nmbe.ch, version 16.0 http://www.wsc.nmbe.ch/resources/fossils/Fossils16.0.pdf (PDF). Species *''Erieopterus eriensis'' (Whitfield, 1882) — Silurian, USA *''Erieopterus hypsophthalmus'' Kjellesvig-Waering, 1958 — Silurian, USA *?''Erieopterus laticeps'' (Schmidt, 1883) — Silurian, Norway *?''Erieopterus limuloides' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vinetopterus
''Vinetopterus'' is a genus of prehistoric eurypterid from the Devonian period in Europe classified as part of the Moselopteridae family. The genus contains two species, both from Germany: ''V. struvei'' and ''V. martini''.Dunlop, J. A., Penney, D. & Jekel, D. 2015. A summary list of fossil spiders and their relatives. In World Spider Catalog. Natural History Museum Bern, online at http://wsc.nmbe.ch, version 16.0 http://www.wsc.nmbe.ch/resources/fossils/Fossils16.0.pdf (PDF). See also * List of eurypterids This list of eurypterid genera is a comprehensive listing of all genera that have ever been included in the order Eurypterida, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now conside ... References Eurypterina Devonian eurypterids Devonian arthropods of Europe Eurypterids of Europe {{Eurypterid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alkenopterus
''Alkenopterus'' is a genus of prehistoric eurypterid classified as part of the family Onychopterellidae. The genus contains two species, ''A. brevitelson'' and ''A. burglahrensis'', both from the Devonian of Germany. Description Like the other onychopterellids, ''Alkenopterus'' was a small eurypterid. The largest species was ''A. brevitelson'', being long. The other species, ''A. burglahrensis'', represents in fact the smallest species of eurypterid known as far, only measuring . The prosoma (head) was large, with a subquadrate (almost square) to semielliptic (nearly elliptic), horseshoe-like outline. It was anteriorly surrounded by a broad and flat marginal rim that reached its Posterior (anatomy), posterior corners. The carapace (the exoskeleton part covering the prosoma) was rounded in the front. Its surface was somewhat inflated, being distinguished several narrow grooves and ridges, most of them wrinkle-like. The prominent Lateral (anatomy), lateral Compound eye, eyes we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moselopterus
''Moselopterus'' is a genus of prehistoric eurypterid from the Devonian period in Europe. The genus contains three species, ''M. ancylotelson'' and ''M. elongatus'' from Germany and ''M. lancmani'' from Latvia.Dunlop, J. A., Penney, D. & Jekel, D. 2015. A summary list of fossil spiders and their relatives. In World Spider Catalog. Natural History Museum Bern, online at http://wsc.nmbe.ch, version 16.0 http://www.wsc.nmbe.ch/resources/fossils/Fossils16.0.pdf (PDF). See also * List of eurypterids This list of eurypterid genera is a comprehensive listing of all genera that have ever been included in the order Eurypterida, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now conside ... References Eurypterina Devonian eurypterids Devonian arthropods of Europe Eurypterids of Europe {{eurypterid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parahughmilleria
''Parahughmilleria'' (meaning "near ''Hughmilleria''"Meaning opara-at ''www.dictionary.com''. Retrieved 17 July 2018.) is a genus of eurypterid, an extinct group of aquatic arthropods. Fossils of ''Parahughmilleria'' have been discovered in deposits of the Devonian and Silurian age in the United States, Canada, Russia, Germany, Luxembourg and Great Britain, and have been referred to several different species. The first fossils of ''Parahughmilleria'', discovered in the Shawangunk Mountains in 1907, were initially assigned to ''Eurypterus''. It would not be until 54 years later when ''Parahughmilleria'' would be described. ''Parahughmilleria'' is classified in the family Adelophthalmidae, the only clade in the superfamily Adelophthalmoidea. This clade was characterised by their small size, their parabolic (approximately U-shaped) carapaces and the presence of epimera (lateral "extensions" of the segment) on the seventh segment, among others. Like its relatives, ''Parahughmilleri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
