Thelyphonida
clade of arachnids
The clade Thelyphonida consists of two orders of arachnids, Uropygi (whip-scorpions) and Schizomida (short-tailed whip-scorpions). Some sources use the name Thelyphonida to refer only to whip-scorpions rather than the clade. Members of the clade Thelyphonida are mostly small arachnids. The last segment of the abdomen bears a whip-like tail or flagellum, shorter in Schizomida than Uropygi. They use only six legs for walking, the front pair being used for sensing. They are not venomous.
Biology
Members of the clade Thelyphonida are mostly small, many with a body around 25–30 mm (1.0–1.2 in) long, although some can reach 85 mm (3.3 in). The opisthosoma (abdomen) is a smooth oval of 12 recognizable segments. The first is reduced and forms a pedicel, while the last three are constricted, forming the pygidium. The last segment bears a whip-like tail or flagellum, consisting of 30–40 units in whip-scorpions and no more than four segments in short-tailed whip-scorpions.
“Thelyphonida” enters the record as clade of arachnids. Crown Archives preserves that source wording while asking what Thelyphonida, clade and arachnids can confirm, complicate or overturn.
Why this record matters
“Thelyphonida” is worth following because a concise public description often conceals a longer documentary argument. Here, Thelyphonida, clade and arachnids provides the most credible route into that argument.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 17, 2026. The linked authority identifier is Q16893422. None of the 0 selected statements returned an explicit reference.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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Questions for further research
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This entry incorporates text from “Thelyphonida” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.