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Measuring just over 40 centimetres (16 in) in length and 10.5 centimetres (4.1 in) in width, the tergite suggests a eurypterid with a full length of 1.6 metres (5.2 ft) from the beginning of the carapace to the end of the telson, if the extended chelicerae are counted (normally they are not) the total length would exceed 2 metres (6.6 ft). [9]
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.
Illustration of the holotype specimen of "Pterygotus rhenaniae", a pretelson, by Otto Jaekel, 1914. Jaekelopterus was originally described as a species of Pterygotus, P. rhenaniae, in 1914 by German palaeontologist Otto Jaekel based on an isolated fossil pretelson (the segment directly preceding the telson) he received that had been discovered at Alken in Lower Devonian deposits of the ...
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.
The type specimen of A. cummingsi (a coxa, left) and the type specimen of "Pterygotus buffaloensis" (an appendage including the coxa and part of a chelae, right).. The earliest species of Acutiramus to be named was A. macropthalmus (as a species of Pterygotus, Pterygotus macrophthalmus) in 1859.
Restoration of H. socialis. Hughmilleria is the most basal (primitive) known member of the Pterygotioidea. [1] It was a small-sized eurypterid, with the largest specimen measuring 20 cm (8 in), being surpassed by other members of its superfamily, such as Slimonia acuminata, which measured 100 cm (39 in) in length, and Pterygotus grandidentatus, which could reach 1.75 meters (5 ft 8 in). [2]
Eurypteridae is an extinct family of eurypterids that lived in the Silurian and Devonian periods. The family is one of three families contained in the superfamily Eurypteroidea (along with Dolichopteridae and Strobilopteridae), which in turn is one of the superfamilies classified as part of the suborder Eurypterina. [1]