Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections


Synonymy list
YearName and author
1886Synziphosurina Packard
1955Synziphosurina Størmer p. 14
2010Synziphosurina Krzemiński et al. p. 134
2013Prosomapoda Dunlop et al. p. 8
2013Prosomapoda Lamsdell p. 19

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EubilateriaAx 1987
phylumArthropodaLatreille 1829
subphylumChelicerataHeymons 1901
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.

No diagnoses are available
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 Atdabanian to the top of the Holocene or 520.00000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 516.0 Ma

Collections (868 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Atdabanian520.0 - 516.0Poland Paleomerus makowskii (7905)
Atdabanian520.0 - 516.0Sweden Paleomerus hamiltoni (9878 9879 9880)
Middle Cambrian513.0 - 501.0Canada (British Columbia) Aglaspida indet. (171308)
Dresbachian501.0 - 485.4USA (Utah) Beckwithia typa (50592)
Franconian501.0 - 485.4USA (Idaho) Merostomata indet. (184601)
Trempealeauan501.0 - 485.4USA (Wisconsin) Aglaspis sp. (256)
Furongian497.0 - 485.4Russian Federation (Maritime Territory) Beckwithia daubikhensis (10171)
Tremadoc485.4 - 477.7USA (Montana) Merostomata indet. (275)
Tulean485.4 - 471.8USA (Montana) Merostomata indet. (287)
Llanvirnian468.1 - 460.9USA (Tennessee) Chasmataspis laurencii (37450)
Sarka466.0 - 466.0Czech Republic Archeolimulus sp. (3857)
Black River460.9 - 457.5USA (New York) Eurypterida indet. (328)
Letna - Harnagian460.9 - 455.8Czech Republic Triopus draboviensis (3861)
Edenian460.9 - 449.5USA (Pennsylvania) Megalograptus sp. (34895)
Katian453.0 - 445.2Turkey Paraeurypterus anatoliensis (184932)
Richmond - Ashgill449.5 - 443.7USA (Ohio) Megalograptus sp. (392)
Richmondian - Ashgill449.5 - 443.7USA (Ohio) Megalograptus sp. (393)
Hirnantian445.2 - 443.4South Africa Onychopterella augusti (26994)
Llandovery443.4 - 433.4United Kingdom (Scotland) Carcinosoma scoticum, Lamontopterus knoxae, Laurieopterus elegans, Nanahughmilleria conica, Parastylonurus hendersoni, Slimonia dubia, Drepanopterus bembycoides, Drepanopterus pentlandicus, Eurypterus minor, Hardieopterus macrophthalmus, Eurypterus cephalaspis (26885)
Llandovery443.4 - 433.4Canada (Ontario) Carcinosoma libertyi (13854)