Xiphosura (/zɪfoʊˈsjʊərə/; from Ancient Greek ξίφος (xíphos) 'sword', and οὐρά (ourá) 'tail', in reference to its sword-like telson) is an order of arthropods...

appendages form spinnerets that extrude silk, while those of horseshoe crabs (Xiphosura) form gills. Like all arthropods, chelicerates' bodies and appendages...

scorpions) and the extant Xiphosura (horseshoe crabs). The term was originally used by James Dwight Dana to refer to Xiphosura only, but was emended by...

Chelicerata Order: Xiphosura Family: Limulidae Genus: Limulus O. F. Müller, 1785 Type species Monoculus polyphemus Linnaeus, 1758 Synonyms Xiphosura...

arthropods of the family Limulidae and the only living members of the order Xiphosura. Despite their name, they are not true crabs or crustaceans: they are...

identified as the group labelled "Euchelicerata".) A 2019 analysis nests Xiphosura deeply within Arachnida. Discovering relationships within the arachnids...

include Limulus cyclops, Xiphosura americana, and Polyphemus occidentalis. It is the tail that earns this order its name Xiphosura, which derives from the...

Dibasterium † Offacolidae † Prosomapoda "Synziphosurina" (paraphyletic) Xiphosura Dekatriata Chasmataspidida † Houia † Winneshiekia † Eurypterida † Arachnida...

Sipuncula (peanut worms) Arachnida (spiders, scorpionasses, and kin) Xiphosura (horseshoe crabs) Pycnogonida (sea spiders) Branchiopoda (fairy shrimp...

Prosomapoda is a clade of euchelicerates including the groups Xiphosura (horseshoe crabs) and Planaterga (a group comprising bunodids, pseudoniscids,...

The largest animal currently alive is the blue whale. The maximum recorded weight was 190 tonnes for a specimen measuring 27.6 metres (91 ft), whereas...

The Solnhofen Plattenkalk, a collective term of multiple Late Jurassic lithographic limestones in southeastern Germany, is famous for its well preserved...

Arthropods are invertebrate animals having an exoskeleton, a segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They...

Xiphosura (horseshoe crabs)...

The El Mers Group is a geological group in the Middle Atlas of Morocco. It is subdivided into three formations named the El Mers I, II, and III Formations...

Matters by Donald R. Prothero and Carl Buell Bringing Fossils To Life: An Introduction To Paleobiology by Donald R. Prothero Xiphosura at Palaeos.com v t e...

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

crab species, Tachypleus tridentatus and Carcinoscorpius rotundicauda (Xiphosura), in Hong Kong with a regional Asian comparison". Journal of Natural History...

Mikulic, DG; Kluessendorf, J (2005). "A new synziphosurine (Chelicerata: Xiphosura) from the Late Llandovery (Silurian) Waukesha Lagerstatte, Wisconsin,...

Ballesteros, Jesús A. (2019). "A Critical Appraisal of the Placement of Xiphosura (Chelicerata) with Account of Known Sources of Phylogenetic Error". Systematic...

chelae in most of these groups may not be homologous with those found in Xiphosura. The pedipalps are distinctly raptorial (i.e., modified for seizing prey)...

Shpinev; D. V. Vasilenko (2018). "First fossil xiphosuran (Chelicerata, Xiphosura) egg clutch from the Carboniferous of Khakassia". Paleontological Journal...

on the relationships within the Xiphosura and the relations to other closely related groups concluded that the Xiphosura, as presently understood, was paraphyletic...

Long Island Sound is a large marine estuary in the Northeastern United States. It forms the maritime border between New York's Long Island and Connecticut...

crabs (Xiphosura). It was later identified as a grade composed of various basal euchelicerates, eventually excluded from the monophyletic Xiphosura sensu...

Xiphosura (horseshoe crabs)...

digging behaviour uprooting young rice seedlings. Notostraca Lepidurus Xiphosura Synziphosurina Trilobite Denton Belk (2007). "Branchiopoda". In Sol Felty...

is also a fan-shaped structure on the fifth legs of horseshoe crabs (Xiphosura). Flabella were in use in both pagan rituals and in the Christian Church...

Class Pycnogonida (?) Order †Cheloniellida Subphylum Chelicerata Class Xiphosura Class †Eurypterida Class †Chasmataspidida Class Pycnogonida (?) Class...

systematics of Palaeozoic 'horseshoe crabs' and the myth of monophyletic Xiphosura". Zoological Journal of the Linnean Society. 167 (1): 1–27. doi:10.1111/j...