scorpions, are a group of extinct marine arthropods that form the order Eurypterida. The earliest known eurypterids date to the Darriwilian stage of the...

"Les scorpions de mer (les Eurypterida)" (in French). Paleopedia. Retrieved May 23, 2011. Roy Plotnick. "Eurypterida". Access Science. doi:10.1036/1097-8542...

Merostomata is a class of chelicerate arthropods that contains the extinct Eurypterida (sea scorpions) and the extant Xiphosura (horseshoe crabs). The term...

scorpion may refer to: Eurypterids, extinct arthropods in the order Eurypterida Some fish in the family Cottidae, such as: Long-spined sea scorpion (Taurulus...

and American paleontologist Rudolf Ruedemann in their influential The Eurypterida of New York in 1912, though no distinguishing features of the fossils...

(Xiphosura) and/or sea scorpions (Eurypterida), while more recent studies suggest that they form a clade (Dekatriata) with Eurypterida and Arachnida. Chasmataspidids...

eurypterid research Kjellesvig-Waering, Erik N. (1961). "The Silurian Eurypterida of the Welsh Borderland". Journal of Paleontology. 35 (4): 789–835. JSTOR 1301214...

(horseshoe crabs) and Eurypterida (sea scorpions, extinct). The extinct Chasmataspidida may be a sub-group within Eurypterida. The Pycnogonida (sea spiders)...

animals without book lungs such as ticks and harvestmen. The extinct Eurypterida, sometimes called sea scorpions, though they were not all marine, are...

reference to the Eurypterida, some have urged that this usage should be discouraged. The Merostomata label originally did not include Eurypterida, although they...

planatergan chelicerates including the groups Arachnida, Chasmataspidida, Eurypterida and additionally two stem-genera Winneshiekia and Houia. Dekatriata is...

; Legg, David A. (2010). "An isolated pterygotid ramus (Chelicerata: Eurypterida) from the Devonian Beartooth Butte Formation, Wyoming". Journal of Paleontology...

The Salina Group or Salina Formation is a Late Silurian-age, stratigraphic unit of sedimentary rock that is found in Northeastern and Midwestern North...

Salter in 1859. Parahughmilleria salteri Kjellesvig-Waering, 1961 [Order: Eurypterida]. Reported from the Temeside Mudstone Formation (Přídolí epoch) of Ludlow...

The largest prehistoric animals include both vertebrate and invertebrate species. Many of them are described below, along with their typical range of size...

was so unusual that they have been thought to be an order separate to Eurypterida. Recent work however confirms them to be derived members of the suborder...

systematics and phylogeny of the Stylonurina (Arthropoda: Chelicerata: Eurypterida)". Journal of Systematic Palaeontology. 8 (1): 49–61. Bibcode:2010JSPal...

telson (the posteriormost division of the body) unlike any other in the Eurypterida. Beginning with an expanded and flattened section, like that of Slimonia...

Poduromorpha Order Symphypleona Order Neelipleona Order Xiphosurida Order †Eurypterida Order †Chasmataspidida Subclass Acari (Mites) Order Opilioacariformes...

1912 (Eurypterida)". Journal of Paleontology. 38 (2): 331–361. JSTOR 1301554. Kjellesvig-Waering, Erik N. (1961). "The Silurian Eurypterida of the Welsh...

(Phosphatocopina) Other examples of now extinct arthropod groups include Acutiramus (Eurypterida) Apankura (Euthycarcinoidea) Trimerus (Artiopoda) Concavicaris (Thylacocephala)...

Opiliones, as well as in non-arachnid Chelicerata such as the Xiphosura and Eurypterida. The chelifores of the Pycnogonida may be homologous to chelicerae. Engel...

comprehensive listing of all genera that have ever been included in the order Eurypterida, excluding purely vernacular terms. The list includes all commonly accepted...

Timeline of eurypterid research Lamsdell, James C. (11 June 2025). "Codex Eurypterida: A Revised Taxonomy Based on Concordant Parsimony and Bayesian Phylogenetic...

Silurian Eurypterida of the Welsh Borderland". Journal of Paleontology. 35 (4): 789–835. JSTOR 1301214. Kjellesvig-Waering, Erik N. (1964). "Eurypterida: Notes...

morphology but defining differences: Class Xiphosura (horseshoe crabs); class Eurypterida (the extinct eurypterids); class Arachnida (spiders, scorpions, ticks...

Lower Devonian (Lower Emsian) of Alken an der Mosel, Germany. Part 4: Eurypterida, Drepanopteridae, and other groups". Senckenbergiana Lethaea. 54: 359–451...

while the postabdomen was narrow. The telson was a curved spine. Order Eurypterida Burmeister, 1843 Superfamily Carcinosomatoidea Burmeister, 1845 Family...

PMID 19828493. Supplemental material. Clarke, J. K., Ruedemann R. (1912) "The Eurypterida of New York" Størmer, L. 1955. Merostomata. Treatise on Invertebrate...

& Derek E. G. Briggs (2008). "Ecdysis in sea scorpions (Chelicerata: Eurypterida)". Palaeogeography, Palaeoclimatology, Palaeoecology. 265 (3–4): 182–194...