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Mycteroptidae
Mycteroptidae are a family of eurypterids, a group of extinct chelicerate arthropods commonly known as "sea scorpions". The family is one of three families contained in the superfamily Mycteropoidea (along with Hibbertopteridae and Drepanopteridae), which in turn is one of four superfamilies classified as part of the suborder Stylonurina. Mycteroptids were sweep-feeding eurypterids known from the Late Carboniferous to the Late Permian. Description Mycteroptids were medium-sized to fairly large mycteropoids with parabolic prosoma and a hastate telson with paired ventral keels. They had a culticular ornament of scales or mucrones and unlike the hibbertopterids, appendage IV was non-spiniferous. The first and second opisthosomal tergites were strongly developed and elongated. The heads of mycteroptids were subtrapezoid in shape with small compound eyes. 1955. Merostomata. ''Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata'', P39. Mycteroptids only use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycteropoidea
Mycteropoidea is an extinct superfamily of eurypterids, an extinct group of chelicerate arthropods commonly known as "sea scorpions". It is one of four superfamilies classified as part of the suborder Stylonurina. Mycteropoids have been recovered from Europe, Russia, South America and South Africa. Mycteropoid specimens are often fragmentary, making it difficult to establish relationships between the included taxa. Only two mycteropoid taxa are known from reasonable complete remains, '' Hibbertopterus scouleri'' and ''H. wittebergensis''. Mycteropoids were large bizarre Eurypterids found from the Early Silurian to the end of the Permian period. They were sweep feeders, inhabiting freshwater swamps and rivers, feeding by raking through the soft sediment with blades on their anterior appendages to capture small invertebrates. Their morphology was so unusual that they have been thought to be an order separate to Eurypterida. Recent work however confirms them to be derived members o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hibbertopteroidea
Mycteropoidea is an extinct superfamily of eurypterids, an extinct group of chelicerate arthropods commonly known as "sea scorpions". It is one of four superfamilies classified as part of the suborder Stylonurina. Mycteropoids have been recovered from Europe, Russia, South America and South Africa. Mycteropoid specimens are often fragmentary, making it difficult to establish relationships between the included taxa. Only two mycteropoid taxa are known from reasonable complete remains, ''Hibbertopterus scouleri'' and ''H. wittebergensis''. Mycteropoids were large bizarre Eurypterids found from the Early Silurian to the end of the Permian period. They were sweep feeders, inhabiting freshwater swamps and rivers, feeding by raking through the soft sediment with blades on their anterior appendages to capture small invertebrates. Their morphology was so unusual that they have been thought to be an order separate to Eurypterida. Recent work however confirms them to be derived members of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurypterid
Eurypterids, often informally called sea scorpions, are a group of extinct arthropods that form the Order (biology), order Eurypterida. The earliest known eurypterids date to the Darriwilian stage of the Ordovician period 467.3 Myr, million years ago. The group is likely to have appeared first either during the Early Ordovician or Late Cambrian period. With approximately 250 species, the Eurypterida is the most diverse Paleozoic Chelicerata, chelicerate order. Following their appearance during the Ordovician, eurypterids became major components of marine faunas during the Silurian, from which the majority of eurypterid species have been described. The Silurian genus ''Eurypterus'' accounts for more than 90% of all known eurypterid specimens. Though the group continued to diversify during the subsequent Devonian period, the eurypterids were heavily affected by the Late Devonian extinction event. They declined in numbers and diversity until becoming extinct during the Permian–Tri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megarachne Servinei
''Megarachne'' is a genus of eurypterid, an extinct group of aquatic arthropods. Fossils of ''Megarachne'' have been discovered in deposits of Late Carboniferous age, from the Gzhelian stage, in San Luis, Argentina. The fossils of the single and type species ''M. servinei'' have been recovered from deposits that had once been a freshwater environment. The generic name, composed of the Ancient Greek μέγας (''megas'') meaning "great" and Ancient Greek ἀράχνη (''arachne'') meaning "spider", translates to "great spider", because the fossil was misidentified as a large prehistoric spider. With a body length of , ''Megarachne'' was a medium-sized eurypterid. If the original identification as a spider had been correct, ''Megarachne'' would have been the largest known spider to have ever lived. Eurypterids such as ''Megarachne'' are often called "sea scorpions", but the strata in which ''Megarachne'' has been found indicates that it dwelled in freshwater and not in marine envi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycterops
''Mycterops'' is a genus of prehistoric eurypterid of the family Mycteroptidae. ''Mycterops'' lived during the Carboniferous period in Europe and North America. Description Mycteroptids were medium-sized to fairly large. Their outer surface had numerous scales and reticulate ornamentation. Their first and possibly second tergites (dorsal surfaces of the abdominal sections) were strongly developed. Their legs resembled those of '' Stylonurus''. The prosoma (head) was subtrapezoid, with small compound eyes. 1955. Merostomata. ''Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata'', P39. Classification The three genera included in the ''Mycteroptidae'' - ''Mycterops'', '' Woodwardopterus'', and ''Megarachne'' - might represent different ontogenetic stages of each other based on the sizes of the referred specimens and the patterns of mucronation. This would sink the genera ''Woodwardopterus'' and ''Megarachne'' into ''Mycterops''. ''Mycterops whitei'' is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megarachne
''Megarachne'' is a genus of eurypterid, an extinct group of aquatic arthropods. Fossils of ''Megarachne'' have been discovered in deposits of Late Carboniferous age, from the Gzhelian stage, in San Luis, Argentina. The fossils of the single and type species ''M. servinei'' have been recovered from deposits that had once been a freshwater environment. The generic name, composed of the Ancient Greek μέγας (''megas'') meaning "great" and Ancient Greek ἀράχνη (''arachne'') meaning "spider", translates to "great spider", because the fossil was misidentified as a large prehistoric spider. With a body length of , ''Megarachne'' was a medium-sized eurypterid. If the original identification as a spider had been correct, ''Megarachne'' would have been the largest known spider to have ever lived. Eurypterids such as ''Megarachne'' are often called "sea scorpions", but the strata in which ''Megarachne'' has been found indicates that it dwelled in freshwater and not in marine e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hibbertopteridae
Hibbertopteridae (the name deriving from the type genus ''Hibbertopterus'', meaning "Hibbert's wing") is a family of eurypterids, an extinct group of aquatic arthropods. They were members of the superfamily Mycteropoidea. Hibbertopterids were large, broad and heavy animals unlike virtually every other group of eurypterids, which are commonly streamlined and lightweight. Their bizarre morphology is so unusual that they in the past have been thought to represent an entirely distinct order of chelicerates. Fossils of the family first appear in deposits of Middle Devonian age and the last known fossils representing hibbertopterids are known from deposits of Late Permian age. The hibbertopterids represent the last known living eurypterids, going extinct during the Permian–Triassic extinction event or shortly before. Although eurypterids are commonly known as "sea scorpions", hibbertopterids inhabited freshwater swamps and rivers and were unable to swim since they lacked swimming paddl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Woodwardopterus
''Woodwardopterus'' is a genus of prehistoric eurypterid, or sea scorpion, classified as part of the family Mycteroptidae. The genus contains one confirmed species, ''W. scabrosus'', from the Carboniferous of Glencartholm, Scotland. Originally classified as ''Eurypterus scabrosus'', it was later found to be generically distinct and placed as a member of the family Mycteroptidae. Later in 2005, was assigned to its own genus, and linked to a new own family, Woodwardopteridae inside Mycteropoidea, probably as a sister taxon of ''Megarachne''. W. scarabrosus had carapace length about and estimated total length about . A possible second species, ?''W. freemanorum'' was named in 2021 and comes from the Changhsingian (Late Permian) beds of the Baralaba Coal Measures, Bowen Basin, central Queensland, Australia. This possible second species is important due to be the geologically youngest eurypterid discovered (at least 11 Ma younger than any previously known relative), showing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stylonurina
Stylonurina is one of two suborders of eurypterids, a group of extinct arthropods commonly known as "sea scorpions". Members of the suborder are collectively and informally known as "stylonurine eurypterids" or "stylonurines". They are known from deposits primarily in Europe and North America, but also in Siberia. Compared to the other suborder, Eurypterina, the stylonurines were comparatively rare and retained their posterior prosomal appendages for walking. Despite their rarity, the stylonurines have the longest temporal range of the two suborders. The suborder contains some of the oldest known eurypterids, such as ''Brachyopterus'', from the Middle Ordovician as well as the youngest known eurypterids, from the Late Permian. They remained rare throughout the Ordovician and Silurian, though the radiation of the mycteropoids (a group of large sweep-feeding forms) in the Late Devonian and Carboniferous is the last major radiation of the eurypterids before their extinction in the Pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hastimima
''Hastimima'' is a genus of prehistoric eurypterid of the family Mycteroptidae. It contains one valid species, ''Hastimima whitei'', recovered from the Permian Hermit Shale of Arizona, and one dubious species, ''H. sewardi'', from the Devonian of South Africa. Though clearly a mycteropoid eurypterid, the material referred to ''H. sewardi'' is so fragmentary that it is questionable if it possesses any diagnostic value at all. See also * List of eurypterid genera 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 consider ... References Stylonurina Permian arthropods Eurypterids of North America Permian United States Fossil taxa described in 1908 Permian eurypterids {{eurypterid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drepanopterus
''Drepanopterus'' is an extinct genus of eurypterid and the only member of the family Drepanopteridae within the Mycteropoidea superfamily. There are currently three species assigned to the genus. The genus has historically included more species, with nine species associated with the genus ''Drepanopterus'', however five of these have since been proven to be synonyms of pre-existing species, assigned to their own genera, or found to be based on insubstantial fossil data. The holotype of one species proved to be a lithic clast. ''Drepanopterus pentlandicus'' was first described from the Silurian strata of the Pentland Hills in Scotland. The only other fully described valid species is ''Drepanopterus abonensis'', from the Upper Devonian of Portishead, Somerset. The exact relationship of ''Drepanopterus'' to other Eurypterids has long been unclear, however it is now apparent that it is a primitive mycteropoid, and an early relative of the Carboniferous ''Hibbertopterus''. Descripti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historical Biology
''Historical Biology'' is a peer-reviewed scientific journal of paleobiology. It was established in 1988, and is published by Taylor & Francis. The journal is edited by Gareth J. Dyke (National Oceanography Centre). Abstracting & Indexing The journal is abstracted and indexed in the following databases. According to the ''Journal Citation Reports'', the journal has a 2020 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as i ... of 2.259. References External links * Biology journals Taylor & Francis academic journals Publications established in 1988 Paleontology journals 8 times per year journals {{paleontology-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
