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Xiphosura (/zɪfoʊˈsjʊərə/; from
Ancient Gr**** ξίφος (xíphos) 'sword', and οὐρά (ourá) 'tail', in
reference to its sword-like tail) is an
order of arthropods...
-
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...
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include Limulus cyclops,
Xiphosura americana, and
Polyphemus occidentalis. It is the tail that
earns this
order its name
Xiphosura,
which derives from the...
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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...
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Chelicerata Order:
Xiphosura Family:
Limulidae Genus:
Limulus O. F. Müller, 1785 Type
species Monoculus polyphemus Linnaeus, 1758
Synonyms Xiphosura...
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identified as the
group labelled "Euchelicerata".) A 2019
analysis nests Xiphosura deeply within Arachnida.
Discovering relationships within the arachnids...
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Dibasterium †
Offacolidae †
Prosomapoda "Synziphosurina" (paraphyletic)
Xiphosura Dekatriata Chasmataspidida †
Houia †
Winneshiekia †
Eurypterida † Arachnida...
- worms)
Sipuncula (peanut worms)
Arachnida (spiders, scorpions, and kin)
Xiphosura (horseshoe crabs)
Pycnogonida (sea spiders)
Branchiopoda (fairy shrimp...
- 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...
