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Pterygotioidea
Pterygotioidea (the name deriving from the type genus ''Pterygotus'', meaning "winged one") is a superfamily (taxonomy), superfamily of eurypterids, an extinct group of aquatic arthropods. Pterygotioids were the most Derived trait, derived members of the infraorder Diploperculata and the sister taxon, sister group of the Adelophthalmoidea, adelophthalmoid eurypterids. The group includes the basal (phylogenetics), basal and small Hughmilleriidae, hughmilleriids, the larger and specialized Slimonidae, slimonids and the famous Pterygotidae, pterygotids which were equipped with robust and powerful Chelicerae, cheliceral claws. Though the more primitive hughmilleriids were small, ''Hughmilleria, Hughmilleria wangi'' being the smallest of all pterygotioids at just in length, later members of the group, particularly in the Pterygotidae, would become the largest known arthropods to ever exist with several genera surpassing in length. Among all currently recognized eurypterid clades, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hughmilleria
''Hughmilleria'' is a genus of eurypterid, an extinct group of aquatic arthropods. Fossils of ''Hughmilleria'' have been discovered in deposits of the Silurian age in China and the United States. Classified as part of the basal family Hughmilleriidae, the genus contains three species, ''H. shawangunk'' from the eastern United States, ''H. socialis'' from Pittsford, New York, and ''H. wangi'' from Hunan, China. The genus is named in honor of the Scottish geologist Hugh Miller. ''H. socialis'' is the type species of Hughmilleriidae, a eurypterid family classified in the superfamily Pterygotioidea that is differentiated by their streamlined bodies, the enlargement of their medium-sized chelicerae and the presence of paired Spine (zoology), spines on the walking appendages. With the biggest specimen measuring 20 centimetres (8 inches) in length, ''Hughmilleria'' is considered a eurypterid of small size. Description ''Hughmilleria'' is the most basal (primitive) known member of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
