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Pterygotidae (the name deriving from the type genus Pterygotus, meaning "winged one") is a family of eurypterids, an extinct group of aquatic arthropods.They were members of the superfamily Pterygotioidea.
Pterygotus is an extinct genus of giant predatory eurypterid, a group of extinct aquatic arthropods. Fossils of Pterygotus have been discovered in deposits ranging in age from Middle Silurian to Late Devonian , and have been referred to several different species.
Pterygotioidea (the name deriving from the type genus Pterygotus, meaning "winged one") is a superfamily of eurypterids, an extinct group of aquatic arthropods. Pterygotioids were the most derived members of the infraorder Diploperculata and the sister group of the adelophthalmoid eurypterids.
At a length of 2.1 metres (6.9 feet), A. bohemicus is the largest known species of the genus, [1] whilst the smallest were A. floweri and A. perryensis both at a length of 20 cm (7.9 in). [2] The body of Acutiramus was very slender, with members of the genus being almost five times as long as they were wide. [3]
Pterygota (/ ˌ t ɛ r ə ˈ ɡ oʊ t ə / terrə-GOH-tə [2] Ancient Greek: πτερυγωτός, romanized: pterugōtós, lit. 'winged') is a subclass of insects that includes all winged insects and groups who lost them secondarily.
Hughmilleriidae (the name deriving from the type genus Hughmilleria, which is named in honor of Scottish geologist Hugh Miller) is a family of eurypterids, an extinct group of aquatic arthropods. The hughmilleriids were the most basal members of the superfamily Pterygotioidea , in contrast with the more derived (more "advanced") families ...
Restoration of E. osiliensis.. Erettopterus was a big eurypterid, with E. osiliensis, the largest species, measuring approximately 90 cm (35 in) in length. [1] Though this is large relative to most modern day arthropods, Erettopterus was small in comparison of many of the members of its family (the Pterygotidae), such as Jaekelopterus rhenaniae at 2.5 m (8 ft) (the largest known arthropod) and ...
India's Red List of 2018 was released at the Rio+20 Earth Summit. [1] [2] Since then, new animals have been added yearly.While previously this list contained 132 species of plants and animals in 2018, as of the 2023-1 update from the IUCN Red List, over 950 species of animals (and over 600 species of plants) are listed as critically endangered, endangered, or vulnerable.