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Euchelicerata

Taxonomy
Euchelicerata was named by Weygoldt and Paulus (1979). It is extant.

It was assigned to Chelicerata by Dunlop et al. (2003), Lamsdell (2013), Lamsdell et al. (2015), Dunlop et al. (2020).

Subtaxa
Dibasterium, Houia, Polystomurum, Prosomapoda, Thurandina, Titanoprosoma
Sister taxa
Prosomapoda

Synonymy list
YearName and author
1979Euchelicerata Weygoldt and Paulus
2003Euchelicerata Dunlop et al. p. 222
2013Euchelicerata Lamsdell p. 19
2015Euchelicerata Lamsdell et al. p. 2
2020Euchelicerata Dunlop et al. p. 8

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
RankNameAuthor
phylumArthropodaGravenhorst 1843
—Deuteropoda
subphylumChelicerataHeymons 1901
—EuchelicerataWeygoldt and Paulus 1979
—EuchelicerataWeygoldt and Paulus 1979

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Unr. Euchelicerata Weygoldt and Paulus 1979
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G. †Dibasterium Briggs et al. 2012
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†Dibasterium durgae Briggs et al. 2012
G. †Houia Selden et al. 2015
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†Houia yueya Lamsdell et al. 2013
G. †Polystomurum Novojilov 1958
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†Polystomurum stormeri Novojilov 1958
Unr. Prosomapoda Lamsdell 2013
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G. †Anderella Moore et al. 2007
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†Anderella parva Moore et al. 2007
G. †Borchgrevinkium Novojilov 1958
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†Borchgrevinkium taimyrensis Novojilov 1959
G. †Camanchia Moore et al. 2011
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†Camanchia grovensis Moore et al. 2011
G. †Legrandella Eldredge 1974
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†Legrandella lombardii Eldredge 1974
Unr. Planaterga Lamsdell 2013
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G. †Bembicosoma Laurie 1899
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†Bembicosoma pomphicus Laurie 1899
G. †Bunaia Clarke 1919
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†Bunaia heintzi Størmer 1934
G. †Bunodes Eichwald 1859
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†Bunodes lunula Eichwald 1854
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Invalid names: Bunodes rugosus Eichwald 1854 [synonym], Exapinurus schrenki Nieszkowski 1859 [synonym]
Invalid names: Exapinurus Nieszkowski 1859 [synonym]
G. †Cyamocephalus Currie 1927
Unr. Dekatriata Lamsdell 2013
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Or. †Chasmataspidida Caster and Brooks 1956
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Fm. †Chasmataspididae Caster and Brooks 1956
Fm. †Diploaspididae Stormer 1972
G. †Kiaeria Stoermer 1934
Invalid names: Chasmataspidacea Caster and Brooks 1956 [empty], Diploaspidida Simonetta and Delle Cave 1978 [synonym], Heteroaspididae Størmer 1972 [empty]
Unr. Sclerophorata Kamenz et al. 2011
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Cl. Arachnida Lamarck 1801
G. †Winneshiekia Lamsdell et al. 2015
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†Winneshiekia youngae Lamsdell et al. 2015
G. †Pseudoniscus Nieszkowski 1859
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Invalid names: Neolimulus Woodward 1868 [synonym]
G. †Venustulus Moore 2005
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Fm. †Weinberginidae Richter 1929
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G. †Weinbergina Richter and Richter 1929
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†Weinbergina opitzi Richter and Richter 1929
Cl. Xiphosura Latreille 1802
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G. †Ciurcalimulus Lamsdell 2025
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†Ciurcalimulus discobolus Lamsdell 2025
Fm. †Kasibelinuridae Pickett 1993
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G. †Kasibelinurus Pickett 1993
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†Kasibelinurus amicorum Pickett 1993
G. †Pickettia Bicknell et al. 2019
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†Pickettia carteri Eller 1940
Invalid names: Elleriidae Raymond 1944 [synonym]
G. †Maldybulakia Tesakov and Alekseev 1998
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†Maldybulakia angusi Edgecombe 1998
†Maldybulakia malcolmi Edgecombe 1998
Invalid names: Lophodesmus Tesakov and Alekseev 1992 [replaced]
G. †Micrichnus Abel 1926
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†Micrichnus scotti Abel 1926
Invalid names: Artiodactylus Abel 1935 [synonym]
G. †Patesia Bicknell and Smith 2021
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†Patesia randalli Beecher 1902
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Invalid names: Belinurus alleganyensis Eller 1938 [synonym]
G. †Willwerathia Størmer 1969
Or. Xiphosurida Latreille 1802
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Subor. †Belinurina Bergström 1975
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Fm. †Belinuridae Zittel and Eastman 1913
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Invalid names: Euproopidae Eller 1938 [synonym], Liomesaspididae Raymond 1944 [synonym]
Superfm. †Eolimulacea Bergström 1968
Invalid names: Belinuracea Zittel and Eastman 1913 [invalid subgroup], Euproopacea Eller 1938 [invalid subgroup]
Subor. Limulina Richter and Richter 1929
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+
Invalid names: Neobelinuropsis Eller 1938 [objective synonym]
Superfm. Limuloidea Leach 1819
Fm. †Paleolimulidae Raymond 1944
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Invalid names: Moravuridae Přibyl 1967 [synonym]
Fm. †Rolfeiidae Selden and Siveter 1987
Invalid names: Limulacea Leach 1819 [empty]
G. †Lunataspis Rudkin et al. 2008
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†Lunataspis aurora Rudkin et al. 2008
†Lunataspis gundersoni Lamsdell et al. 2025
Invalid names: Bellinurina Zittel and Eastman 1913 [empty], Omoptilus Pruvost 1919 [nomen dubium], Omoptilus hispidus Pruvost 1919 [nomen dubium], Paleolimuloidea Anderson and Selden 1997 [empty]
Invalid names: Gnathopoda Straus-Durkheim 1829 [synonym], Merostomata Dana 1852 [synonym], Poecilopoda Claus 1868 [synonym], Xyphosures Latrielle 1802 [synonym]
Invalid names: Synziphosurina Packard 1886 [invalid subgroup]
G. †Thurandina Størmer 1974
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†Thurandina waterstoni Stoermer 1974
G. †Titanoprosoma Bicknell et al. 2024
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†Titanoprosoma edgecombei Bicknell et al. 2024
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Locomotion: actively mobilep
Created: 2004-02-29 09:38:49
Modified: 2004-02-29 11:38:49
Source: p = phylum
Reference: Kiessling 2004

Age range

Maximum range based only on fossils: base of the Early/Lower Cambrian to the top of the Holocene or 538.80000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 506.5 Ma

Collections (931 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Early/Lower Cambrian538.8 - 506.5Sweden (Öland) Eolimulus alata (210576)
Franconian497.0 - 486.85USA (Idaho) Merostomata indet. (184601)
Tremadoc486.4 - 477.1USA (Montana) Merostomata indet. (275)
Tulean481.7 - 475.3USA (Montana) Merostomata indet. (287)
Sarka469.4 - 463.3Czechia Archeolimulus hanusi (3857)
Darriwilian469.4 - 458.2USA (Iowa) Winneshiekia youngae (225212)
Darriwilian469.4 - 458.2United Kingdom (Wales) Xiphosura indet. (230215)
Llanvirn468.0 - 458.2USA (Tennessee) Chasmataspis laurencii (37450)
Katian452.8 - 445.2Canada (Manitoba) Lunataspis aurora (216760 216761)
Richmondian449.6 - 445.5USA (Michigan) Lunataspis gundersoni, Chasmataspidida indet. (240958)
Llandovery - Wenlock443.1 - 426.7United Kingdom (Scotland) Xiphosurida indet. (26886 26889)
Telychian438.6 - 432.9United Kingdom (Scotland) Bembicosoma pomphicus, Palaeophonus loudonensis (153581)
Telychian438.6 - 432.9USA (Wisconsin) Synziphosurina indet., Xiphosurida indet. (91415)
Telychian - Sheinwoodian438.6 - 430.6United Kingdom (South Lanarkshire) Palaeophonus caledonicus (153592)
Sheinwoodian432.9 - 430.6Sweden Palaeophonus nuncius (153548)
Wenlock432.9 - 426.7Canada (Ontario) Eramoscorpius brucensis (165189 165190)
Wenlock432.9 - 426.7United Kingdom Dibasterium durgae (68060)
Rootsikula428.6 - 426.7Norway Xiphosurida indet. (26928) Xiphosurida indet., Bunodes sp., Kiaeria limuloides (14308)
Ludlow426.7 - 422.7USA (New York) Xiphosurida indet. (26080)
Ludlow426.7 - 422.7Ukraine (Khmelnitsky) Pasternakevia podolica (225270)