@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix dwc: <http://rs.tdwg.org/dwc/terms/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix d0: <http://www.ontologydesignpatterns.org/ont/d0.owl#> .
@prefix dul: <http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#> .
@prefix skos-xl: <http://www.w3.org/2008/05/skos-xl#> .
@prefix top-level: <https://aphia.org/ns/top-level/> .
@prefix taxon-name: <https://aphia.org/ns/taxon-name/> .
@prefix td: <https://aphia.org/ns/distribution/> .
@prefix media: <https://aphia.org/ns/media/> .
@prefix tat: <https://aphia.org/ns/attribute-trait/> .
@prefix xsd: <https://www.w3.org/2001/XMLSchema#> .
@prefix schema: <https://schema.org/> .

<https://aphia.org/id/taxname/163056> a taxon-name:TaxonName, skos-xl:Label ;
   rdfs:label "Chaetoceros difficilis Cleve, 1900"^^xsd:string ;
   taxon-name:aphiaID "163056"^^xsd:integer ;
   dwc:scientificNameID "163056"^^xsd:integer, "urn:lsid:marinespecies.org:taxname:163056"^^xsd:string ;
   taxon-name:scientificName "Chaetoceros difficilis"^^xsd:string ;
   taxon-name:authorship "Cleve, 1900"^^xsd:string ;
   dwc:scientificNameAuthorship "Cleve, 1900"^^xsd:string ;
   taxon-name:fullScientificName "Chaetoceros difficilis Cleve, 1900"^^xsd:string ;
   skos-xl:literalForm "Chaetoceros difficilis Cleve, 1900"^^xsd:string ;
   dwc:scientificName "Chaetoceros difficilis Cleve, 1900"^^xsd:string ;
   dct:bibliographicCitation """Kociolek, J.P.; Blanco, S.; Coste, M.; Ector, L.; Liu, Y.; Karthick, B.; Kulikovskiy, M.; Lundholm, N.; Ludwig, T.; Potapova, M.; Rimet, F.; Sabbe, K.; Sala, S.; Sar, E.; Taylor, J.; Van de Vijver, B.; Wetzel, C.E.; Williams, D.M.; Witkowski, A.; Witkowski, J. (2026). DiatomBase. Chaetoceros difficilis Cleve, 1900. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=163056 on 2026-04-28"""^^xsd:string ;
   dct:isPartOf <https://marineinfo.org/id/dataset/632>, <https://marineinfo.org/id/dataset/3123>, <https://marineinfo.org/id/dataset/8131>, <https://marineinfo.org/id/dataset/5789> ;
   taxon-name:hasStatus <https://aphia.org/ns/taxonomic-status#unassessed> ;
   taxon-name:isOfRank <https://aphia.org/ns/rank#species> ;
   dwc:taxonRank <https://aphia.org/ns/rank#species> ;
   dct:source <https://aphia.org/id/source/79431>, <https://aphia.org/id/source/4128>, <https://aphia.org/id/source/140196>, <https://aphia.org/id/source/141233>, <https://aphia.org/id/source/170339>, <https://aphia.org/id/source/265728> ;
   rdfs:seeAlso <http://www.biodiversitylibrary.org/name/Chaetoceros_difficilis>, <http://researcharchive.calacademy.org/research/diatoms/names/index.asp?xAction=getrec&TaxonCode=7047>, <http://www.dyntaxa.se/Taxon/Info/237324?changeRoot=True>, <http://www.eu-nomen.eu/portal/taxon.php?GUID=urn:lsid:marinespecies.org:taxname:163056> ;
   taxon-name:denotes _:b0 .

_:b0 a taxon-name:Taxon, skos:Concept ;
   taxon-name:hasAcceptedName <https://aphia.org/id/taxname/163056> ;
   tat:hasHabitat <https://aphia.org/id/environment/marine> ;
   td:hasDistribution <https://aphia.org/id/distribution/672674>, <https://aphia.org/id/distribution/783298>, <https://aphia.org/id/distribution/804850> ;
   tat:hasAdditionalDescription <https://aphia.org/id/taxon-description/17847> ;
   taxon-name:hasParent _:b1 .

_:b1 a taxon-name:Taxon, skos-xl:Concept ;
   taxon-name:hasAcceptedName <https://aphia.org/id/taxname/148985> .

<https://aphia.org/ns/taxonomic-status#unassessed> a skos:Concept, taxon-name:Status ;
   skos:prefLabel "unassessed"@en ;
   rdfs:label "unassessed"@en ;
   skos:definition """Name coming from nomenclator (lists of names) or from, e.g., museum collection database, where the status might be known in the published literature, but for which the status has not yet been researched, assessed and documented"""^^xsd:string ;
   dwc:taxonomicStatus <https://rs.gbif.org/vocabulary/gbif/taxonomicStatus/doubtfull> ;
   dwc:nomenclaturalStatus <https://rs.gbif.org/vocabulary/gbif/nomenclatural_status/dubimum> .


<https://aphia.org/ns/rank#species> a skos:Concept, taxon-name:Rank ;
   skos:prefLabel "Species"@en ;
   rdfs:label "Species"@en .

<https://aphia.org/id/source/79431> a top-level:Source, dct:BibliographicResource ;
   dct:title """Notes on some Atlantic plankton-organisms."""^^xsd:string ;
   dct:bibliographicCitation  """Cleve, P.T. (1900). Notes on some Atlantic plankton-organisms. Kungliga Svenska Vetensk-Akademiens Handlingar, New Series 34(1):1-22, pls. 1-8."""^^xsd:string ;
   schema:isAccessibleForFree "1"^^xsd:boolean ;
   schema:datePublished "1900"^^xsd:gYear .

<https://aphia.org/id/source/4128> a top-level:Source, dct:BibliographicResource ;
   dct:title """Checklist of Baltic Sea Phytoplankton Species (including some heterotrophic protistan groups)"""^^xsd:string ;
   dct:bibliographicCitation  """Hällfors, G. (2004). Checklist of Baltic Sea Phytoplankton Species (including some heterotrophic protistan groups). <em>Baltic Sea Environment Proceedings.</em> No. 95: 210 pp."""^^xsd:string ;
   schema:datePublished "2004"^^xsd:gYear .

<https://aphia.org/id/source/140196> a top-level:Source, dct:BibliographicResource ;
   dct:title """Catalogue of Diatom Names"""^^xsd:string ;
   dct:bibliographicCitation  """Fourtanier, E. & Kociolek, J. P. (compilers). (2011). Catalogue of Diatom Names. California Academy of Sciences, On-line Version. Updated 2011-09-19."""^^xsd:string ;
   schema:datePublished "2011"^^xsd:gYear .

<https://aphia.org/id/source/141233> a top-level:Source, dct:BibliographicResource ;
   dct:title """Diatoms (Bacillariophyta) of the Gulf of Mexico"""^^xsd:string ;
   dct:bibliographicCitation  """Krayesky, D. M.; Meave, D. C.; Zamudio, E.; Norris, E.; Fredericq, S.; Tunnell, J. (2009). Diatoms (Bacillariophyta) of the Gulf of Mexico. <em>Gulf of Mexico origin, waters, and biota.</em> 1: 155-186."""^^xsd:string ;
   schema:datePublished "2009"^^xsd:gYear .

<https://aphia.org/id/source/170339> a top-level:Source, dct:BibliographicResource ;
   dct:title """Phylum Ochrophyta: brown and golden-brown algae, diatoms, silicoflagellates, and kin"""^^xsd:string ;
   dct:bibliographicCitation  """Harper, M.A.; Cassie Cooper, V.; Chang, F.H.; Nelson, W.A.; Broady, P.A. (2012). Phylum Ochrophyta: brown and golden-brown algae, diatoms, silicoflagellates, and kin, in: Gordon, D.P. (Ed.) (2012). New Zealand inventory of biodiversity: 3. Kingdoms Bacteria, Protozoa, Chromista, Plantae, Fungi. pp. 114-163."""^^xsd:string ;
   schema:datePublished "2012"^^xsd:gYear .

<https://aphia.org/id/source/265728> a top-level:Source, dct:BibliographicResource ;
   dct:title """A check-list of the freshwater, brackish and marine diatoms of the British Isles and adjoining coastal waters"""^^xsd:string ;
   dct:bibliographicCitation  """Hartley, B., Ross, R. & Williams, D.M. (1986). A check-list of the freshwater, brackish and marine diatoms of the British Isles and adjoining coastal waters. <em>Journal of the Marine Biological Association of the United Kingdom.</em> 66(3): 531-610."""^^xsd:string ;
   dct:source  <https://www.doi.org/10.1017/s0025315400042235> ;
   schema:datePublished "1986"^^xsd:gYear .




<https://aphia.org/id/distribution/672674> a td:Distribution ;
   rdfs:label "Distribution for Chaetoceros difficilis Cleve, 1900 - Gulf of Mexico"@en ;
   td:isDistributionOf [
   a taxon-name:Taxon, skos:Concept ;
   taxon-name:isDenotedBy <https://aphia.org/id/taxname/163056> ;
   ] ;
   td:hasArea <https://marineregions.org/mrgid/4288> ;
   dwc:locality <https://marineregions.org/mrgid/4288> ;
   dct:source <https://aphia.org/id/source/401228> .

<https://aphia.org/id/distribution/783298> a td:Distribution ;
   rdfs:label "Distribution for Chaetoceros difficilis Cleve, 1900 - Swedish Exclusive Economic Zone"@en ;
   td:isDistributionOf [
   a taxon-name:Taxon, skos:Concept ;
   taxon-name:isDenotedBy <https://aphia.org/id/taxname/163056> ;
   ] ;
   td:hasArea <https://marineregions.org/mrgid/5694> ;
   dwc:locality <https://marineregions.org/mrgid/5694> ;
   dct:source <https://aphia.org/id/source/165516> .

<https://aphia.org/id/distribution/804850> a td:Distribution ;
   rdfs:label "Distribution for Chaetoceros difficilis Cleve, 1900 - New Zealand Exclusive Economic Zone"@en ;
   td:isDistributionOf [
   a taxon-name:Taxon, skos:Concept ;
   taxon-name:isDenotedBy <https://aphia.org/id/taxname/163056> ;
   ] ;
   td:hasArea <https://marineregions.org/mrgid/8455> ;
   dwc:locality <https://marineregions.org/mrgid/8455> ;
   dct:source <https://aphia.org/id/source/170339> .

<https://aphia.org/id/taxon-description/17847> a tat:TaxonDescription ;
   rdfs:label "Taxon Description Functional group for Taxon denoted by name 148985"@en ;
   tat:hasExtraSpecification <https://aphia.org/id/taxon-description-extra-specification/17848> ;
   tat:hasTaxonCharacteristic <https://aphia.org/ns/traits/functional-group> ;
   tat:isAdditionalDescriptionOf [
   a taxon-name:Taxon, skos:Concept ;
   taxon-name:isDenotedBy <https://aphia.org/id/taxname/148985> ;
   ] ;
   top-level:hasValue <https://aphia.org/ns/traits/functional-group#phytoplankton> .

<https://aphia.org/id/taxon-description-extra-specification/17848> a tat:SpecificationContext ;
   rdfs:label "Specification Context: Life stage adult"@en ;
   tat:definesParameter <https://aphia.org/ns/traits/life-stage> ;
   top-level:hasValue <https://aphia.org/ns/traits/life-stage#adult> .