IUCN Red List data observations

Unofficial notes for the next release's data review · IUCN Red List version 2026-1

Parent taxon spelled differently in the Catalogue of Life

Source: IUCN Red List 2026-1 vs Catalogue of Life COL26.7 XR (2026-07-17) · 94 rows

The table below lists higher-rank names whose parent taxon is spelled slightly differently in IUCN and the Catalogue of Life (a typo, a diacritic, a Unicode-encoding difference, or a short spelling difference), which suggests the same placement written two ways. Only names within the same phylum are compared.

Why it matters

A near-identical parent name usually means the same placement recorded two ways. Aligning the spelling lets the two classifications match up.

Suggestion

Confirm the intended spelling of the parent name in each row.

The Catalogue of Life crosscheck

Every assessed name is checked against the Catalogue of Life; each difference found is listed on exactly one of the pages below. Pages are ordered by how likely a row is to need a change.

PageActionNamesSince 2025-2What it lists
Names with a close Catalogue of Life matchFix by hand799Not in CoL under this name; a near spelling is, in the same genus or with the same epithet.
Names not in the Catalogue of Life, but an IUCN synonym isFix by hand134Not in CoL under this name; one of the taxon's IUCN synonyms is there as a synonym.
Species and subspecies treated as synonyms in the Catalogue of LifeDecide policy11,664CoL treats the name as a synonym of an accepted name that IUCN does not list.
Higher-rank names treated as synonyms in the Catalogue of LifeFix by hand717A genus, family, order, or class name that CoL records only as a synonym.
Parent taxon spelled differently in the Catalogue of Life this pageFix by hand94Same parent taxon in both, spelled slightly differently.
Name pairs where IUCN and the Catalogue of Life differ on which name is acceptedNo action2,742Both catalogues hold both names and disagree only on which is accepted.
Higher-rank names placed under a different parent in the Catalogue of LifeNo action1,663CoL places the name under a different order, class, or family.
Appendix
Names not in the Catalogue of Life, but a Wikidata or Wikipedia name isFix by hand23Not in CoL under this name or an IUCN synonym; Wikidata or Wikipedia give a name CoL has.
Author names spelled differentlyFix by hand9,343Same name in both; the author is spelled slightly differently.
Names not in the Catalogue of Life under any known nameNo action722Not in CoL under this name, a near spelling, or any other name known for the taxon.

By rank

Every row is in the CSV download.

RankCount
order1
family8
genus85

Preview

IUCN nameRankRank comparedIUCN placementCoL placementCoL entryGroupIUCN taxaDetail
BALANOMORPHAorderclassTHEOCOSTRACAThecostracaviewCrustaceans: Barnacles2Class placement differs and 1-character spelling difference: IUCN 'THEOCOSTRACA' versus CoL 'Thecostraca'.
NEOLEPETOPSIDAEfamilyorderPATELLIDANacellidaviewMolluscs: Gastropods11Order placement differs and 2-character spelling difference: IUCN 'PATELLIDA' versus CoL 'Nacellida'.
SEPIADARIIDAEfamilyorderSEPIIDASepiolidaviewMolluscs: Cephalopods8Order placement differs and 2-character spelling difference: IUCN 'SEPIIDA' versus CoL 'Sepiolida'.
IDIOSEPIIDAEfamilyorderIDIOSEPIIDAIdiosepidaviewMolluscs: Cephalopods6Order placement differs and 1-character spelling difference: IUCN 'IDIOSEPIIDA' versus CoL 'Idiosepida'.
HOLOTHYRIDAEfamilyorderHOLOTHYROIDAEHolothyridaviewArachnids4Order placement differs and 2-character spelling difference: IUCN 'HOLOTHYROIDAE' versus CoL 'Holothyrida'.
LIMULIDAEfamilyorderXIPHOSURAXiphosuridaviewOther invertebrates: Horseshoe crabs4Order placement differs and 2-character spelling difference: IUCN 'XIPHOSURA' versus CoL 'Xiphosurida'.
LOTTIIDAEfamilyorderPATELLIDANacellidaviewMolluscs: Gastropods2Order placement differs and 2-character spelling difference: IUCN 'PATELLIDA' versus CoL 'Nacellida'.
EUPHAUSIIDAEfamilyorderEUPHASIACEAEuphausiaceaviewCrustaceans1Order placement differs and 1-character spelling difference: IUCN 'EUPHASIACEA' versus CoL 'Euphausiacea'.
PECTINODONTIDAEfamilyorderPATELLIDANacellidaviewMolluscs: Gastropods1Order placement differs and 2-character spelling difference: IUCN 'PATELLIDA' versus CoL 'Nacellida'.
PterorhinusgenusfamilyLEIOTRICHIDAELeiothrichidaeviewBirds23Family placement differs and 1-character spelling difference: IUCN 'LEIOTRICHIDAE' versus CoL 'Leiothrichidae'.
TrochalopterongenusfamilyLEIOTRICHIDAELeiothrichidaeviewBirds19Family placement differs and 1-character spelling difference: IUCN 'LEIOTRICHIDAE' versus CoL 'Leiothrichidae'.
ArgyagenusfamilyLEIOTRICHIDAELeiothrichidaeviewBirds17Family placement differs and 1-character spelling difference: IUCN 'LEIOTRICHIDAE' versus CoL 'Leiothrichidae'.
CharmosynagenusfamilyPSITTACIDAEPsittaculidaeviewBirds15Family placement differs and 2-character spelling difference: IUCN 'PSITTACIDAE' versus CoL 'Psittaculidae'.
TrichoglossusgenusfamilyPSITTACIDAEPsittaculidaeviewBirds15Family placement differs and 2-character spelling difference: IUCN 'PSITTACIDAE' versus CoL 'Psittaculidae'.
GarrulaxgenusfamilyLEIOTRICHIDAELeiothrichidaeviewBirds14Family placement differs and 1-character spelling difference: IUCN 'LEIOTRICHIDAE' versus CoL 'Leiothrichidae'.

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