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Sailfin roughshark

species of fish

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJun 23, 2026
Entity authorityQ1543750 ↗
Source-derived summary

The sailfin roughshark (Oxynotus paradoxus) is a species of dogfish shark in the family Oxynotidae, found in the eastern North Atlantic from Scotland to Senegal between latitudes 61°N and 11°N, at depths of between 265 and 720 m (870 and 2,360 ft). Its length is up to 1.2 m (3 ft 11 in).

Its reproduction is ovoviviparous.

Oxynotus paradoxus is thought to be a slow-moving predator of small benthic animals. The sailfin roughsharks is found near the Eastern Atlantic Ocean at those depths. However, it has been reported to be found on the shores of Morocco, recently reported in the Mid-Atlantic Ridge, and in the Azores water. This species is an uncommon bycatch of bottom trawls, and is listed by the International Union for Conservation of Nature (IUCN) as Vulnerable.

Taxonomy

French biologist F. Frade found this species of Oxynotus paradoxus. This name was later finalized and accepted by the scientific community as the official name for the species. Frade published his findings of this specimen in 1929 in the scientific journal Boletim da Sociedade Portuguesa de Ciências Naturais.

Editorial summary

This brief starts where responsible research should: with the source description of “Sailfin roughshark” as species of fish. Everything that follows is an evidence route, not borrowed authority.

Editorial reviewA practical orientation to terminology and classification, particularly when read beside dated observations, specimens or technical literature. The current lead gives the account dated anchors—1929—that can be checked directly. The selected authority fields contribute no independent date. The account is most persuasive where Sailfin, roughshark and species can be independently traced.
Editorial analysis

Why this record matters

The subject matters to the science & nature register because the source frames it as species of fish. Its deeper value depends on whether names, dates, institutions and citations support that framing.

Evidence profile

Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Jun 23, 2026. The linked authority identifier is Q1543750. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1929.

Critical limits

Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. 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.

How to read it

Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.

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  • Current terminology
  • Classification context
  • Finding cited technical literature
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  2. Expand the search: follow Sailfin roughshark primary sources, Sailfin roughshark archive and Sailfin research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

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Source & attribution

This entry incorporates text from “Sailfin roughshark” 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.