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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.
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.
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.
English: Size comparison of the largest species of each genus in Pterygotidae, a family of large, predatory sea scorpions. Reference Images: Public Domain, used to create direct dorsal profile of Jaekelopterus, Acutiramus, and Pterygotus; By Dmitry Bogdanov, used to fine tune the silhouette of Jaekelopterus
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]
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.
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 ...
This is a list of the bird species of India and includes extant and recently extinct species recorded within the political limits of the Republic of India as defined by the Indian government. There have been 1377 species recorded as of 2023, [ 1 ] of which 81 are endemic to the country.