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 considered invalid, doubtful (nomen dubium), or were not formally published (nomen nudum), as well as junior synonyms of more established names and genera that are no longer considered eurypterids. The list currently includes 115 names out of which 74 are considered valid eurypterid genera.
There are approximately 250 species of eurypterids recognized as valid.[1]
There is no "official" or "canonical" list of eurypterid genera. The closest thing is found contained in the regularly updated Summary list of fossil spiders and their relatives in the World Spider Catalog. The vast majority of the content of the list below, including the valid genera, preoccupied names, junior synonyms, taxonomical classifications and sites of discovery, is based upon the 2018 edition of the Summary list. Content not based on the list, such as genera described after its publication, is noted through inline citations.
Naming conventions and terminology follow the International Code of Zoological Nomenclature. Technical terms used include:
Acanthoeurypterus
Kjellesvig-Waering
N/A
Jr. synonym
Nomen manuscriptum, also considered as a synonym of Eurypterus.[2]
Alloeurypterus
Angustidontus
Cooper
1936
Misidentification[4]
Misidentified, a crustacean.
Anthraconectes
Meek & Worthen
1868
Synonym of Adelophthalmus.
Baltoeurypterus
Størmer
1973
Synonym of Eurypterus.
Belinuropsis
Matthew
1910
Nomen dubium
Carboniferous
Too poorly preserved to be assigned to any particular arthropod group.[5]
Bembicosoma
Laurie
1899
Misidentification[6]
Misidentified, a stem genus on Planaterga.
Borchgrevinkium
Novojilov
1959
Misidentification[1]
Misidentified, possibly a stem prosomapod.
Bunodella
1889
Silurian
Uncertain affinities, probably synonym of Acutiramus.[7]
Campylognathus
Diener
1924
Preoccupied[8]
Preoccupied by a genus of plant bugs, changed to Campylocephalus.
Clintonipterus
Nomen nudum
Informal name that only appears in notes in museum drawers.[9]
Curviramus
Ruedemann
1935
Synonym of Pterygotus.
Cyrtoctenus
Størmer & Waterston
1968
Synonym of Hibbertopterus.[10]
Dolichocephala
Claypole
1883
Preoccupied
Preoccupied by a genus of flies, synonym of Hallipterus.
Dunsopterus
Waterston
Eidothea
Scouler
1831
Preoccupied[11]
Preoccupied name, changed to Campylocephalus.
Eurypterella
1888
Too poorly preserved to be assigned to any particular arthropod group.[12]
Eurysoma
1890
Preoccupied name, changed to Carcinosoma.
Eusarcus
Grote & Pitt
1875
Preoccupied name, changed to Eusarcana.
Glaucodes
Pruvost
1923
Jr. synonym[13]
Synonym of Mycterops.
Glyptoscorpius
Peach
1882
Himantopterus
Salter
1856
Preoccupied[14]
Unavailable junior homonym, replaced by name Erettopterus
Kockurus
Chlupáč
1995
Misidentification
Misidentified, likely represents an aglaspidid.
Kodymirus
Lepidoderma
Reuss
1855
Mazonipterus
1963
Misidentified, a plant.
Melbournopterus
Caster & Kjellesvig-Waering
1953
Misidentified, a brachipod.
Onychopterus
Miller & Gurley
1896
Preoccupied[13]
Preoccupied name, changed to Onychopterella.
Paracarcinosoma
1964
Synonym of Eusarcana.
Parka
Fleming
Misidentification[15]
Polystomurum[17]
1958
Misidentified, an unplaced euchelicerate.[1]
Polyzosternites
Goldenberg
1873
Sidneyia
Walcott
1911
Misidentification[18]
Misidentified, an arachnomorph.[19]
Strabops
Beecher
1901
Misidentification[21]
Misidentified, a strabopid.
Syntomopterella
Tellie
2007
Synonym of Strobilopterus.
Syntomopterus
1961
Preoccupied name, changed to Strobilopterus.
Tarsopterus
Clarke & Ruedemann
1912
Preoccupied name, changed to Tarsopterella.
Truncatiramus
Synonym of Erettopterus.
Tylopterus
Preoccupied name, changed to Tylopterella.
Willwerathia
Misidentification[24]
Misidentified, a xiphosuran.
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