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

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...

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

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

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

ago in the Cretaceous. Limulidae is the only extant family of the order Xiphosura, and contains all four living species of horseshoe crabs: Carcinoscorpius...

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...

The largest animal currently alive is the blue whale. The maximum recorded weight was 190 tonnes (209 US tons) for a specimen measuring 27.6 metres (91 ft)...

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

Selden, Paul A. (March 2013). "A horseshoe crab (Arthropoda: Chelicerata: Xiphosura) from the Lower Devonian (Lochkovian) of Yunnan, China". Geological Magazine...

The Solnhofen Limestone or Solnhofen Plattenkalk is a collective term for multiple Late Jurassic lithographic limestones in southeastern Germany, which...

Xiphosura (horseshoe crabs)...

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

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

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)...

Prothero Xiphosura at Palaeos.com Anderson, Lyall I.; Selden, Paul A. (March 1997). "Opisthosomal fusion and phylogeny of Palaeozoic Xiphosura". Lethaia...

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

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

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...

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...

Pycnogonida (sea spiders) Euchelicerata Xiphosura (horseshoe crabs) Arachnida (spiders, scorpions, ticks, mites)...

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

classified the Merostomata (containing virtually only the Eurypterida) and Xiphosura within a group he named Gigantostraca within the crustaceans. Though Haeckel...

Pycnogonida (sea spiders) Euchelicerata Xiphosura (horseshoe crabs) Arachnida (spiders, scorpions, ticks, mites)...

Xiphosura (horseshoe crabs)...

E. G.; Braddy, Simon J.; Shultz, Jeffrey W. (2011). "Synziphosurines (Xiphosura: Chelicerata) from the Silurian of Iowa". Journal of Paleontology. 85...

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...

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

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