the largest known arthropods. They are members of the extinct order Eurypterida. It is a most diverse Chelicerate order. They are also called sea scorpions...

Merostomata is a name given to the now extinct sea scorpions (Eurypterida) and the horseshoe crabs (Xiphosura). There are four known species of horsehoe...

Archived from the original on October 21, 2012. Retrieved May 20, 2011. "Eurypterida: Fossil Record". University of California Museum of Paleontology. Retrieved...

and a new, larger covering is formed. Amongst fossils, trilobites and eurypterida used ecdysis. Ecdysis is part of the whole process of metamorphosis....

District in Canada. "Phylogeny and palaeoecology of the Adelophthalmoidea (Arthropoda; Chelicerata; Eurypterida)". Journal of Systematic Palaeontology....

name Merostomata is still seen in textbooks, without reference to the Eurypterida, some have urged that this usage should be discouraged. The shared features...

V. P. (1989). "Morphology, taxonomy, and classification of the order Eurypterida Burmeister, 1843". Journal of Paleontology. 63 (5): 642. Bibcode:1989JPal...

and their relatives), Chasmataspidida (extinct chelicerate group), Eurypterida (Sea Scorpions), as well as genuses of Winneshiekia and Houia. Lamsdell...

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

The order they belong to, the Xiphosura, are basal to a clade of the Eurypterida and the Arachnida. It is estimated that the Xiphosura diverged from the...

scorpions. Xiphosura: horseshoe crab Limulus. Pycnogonida: sea spiders. Eurypterida: sea scorpions (extinct). 63,000 species described.p179 Myriapoda. Classes:...