{"key":"97f440e7-d8c5-437d-b6bd-ad0da44bc70e","installationKey":"c4e83f8a-f24c-4573-a197-f085ca242917","publishingOrganizationKey":"689b40c4-ff31-4cd0-83a5-a7a828f1cd92","doi":"10.15468/62n2u7","external":false,"numConstituents":0,"type":"OCCURRENCE","subtype":"OBSERVATION","title":"Circumpolar otoplanid flatworms","description":"<p>The dataset contains occurrences and images of two flatworm species (Itaspiella helgolandica and Notocaryoplana arctica) in the family Otoplanidae from northern Norway, Greenland and Svalbard.</p>","language":"eng","citation":{"text":"Vikberg Wernström J, Hang Kwan Y, Vohnname T R, Glud R N, Altenburger A (2025). Circumpolar otoplanid flatworms. Version 1.0. UiT The Arctic University of Norway. 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flatworms herein were identified to at least family level.","coverages":[{"scientificName":"Otoplanidae","commonName":"otoplanid flatworms","rank":{"verbatim":"family","interpreted":"FAMILY"}},{"scientificName":"Notocaryoplana arctica","rank":{"verbatim":"species","interpreted":"SPECIES"}},{"scientificName":"Itaspiella helgolandica","rank":{"verbatim":"species","interpreted":"SPECIES"}}]}],"geographicCoverages":[{"description":"Northern Norway, Greenland and Svalbard.","boundingBox":{"minLatitude":64.179,"maxLatitude":78.24,"minLongitude":-51.746,"maxLongitude":18.907,"globalCoverage":false}}],"temporalCoverages":[{"@type":"range","start":"2024-04-26T00:00:00.000+00:00","end":"2024-08-14T00:00:00.000+00:00"}],"keywordCollections":[{"thesaurus":"GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml","keywords":["Occurrence"]},{"thesaurus":"GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml","keywords":["Observation"]}],"project":{"title":"Phylogeographic study of circumpolar otoplanid flatworms","contacts":[{"type":"AUTHOR","primary":false,"userId":["https://orcid.org/0000-0003-2902-7664"],"firstName":"Joel","lastName":"Vikberg Wernström","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"AUTHOR","primary":false,"userId":["https://orcid.org/0000-0001-5258-8043"],"firstName":"Andreas","lastName":"Altenburger","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"AUTHOR","primary":false,"userId":["https://orcid.org/0000-0003-4107-5650"],"firstName":"Yick","lastName":"Hang Kwan","position":[],"email":[],"phone":[],"homepage":[],"address":[]},{"type":"AUTHOR","primary":false,"userId":["https://orcid.org/0000-0002-7069-893X"],"firstName":"Ronnie 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In spite of their presumed poor dispersal capabilities, several taxa have been recorded across the Arctic. This project was designed to investigate explanatory factors for their wide distribution such as cryptic speciation and continuous, cross-oceanic dispersal."},"samplingDescription":{"studyExtent":"Flatworms were sampled in northern Norway, Greenland and Svalbard.","sampling":"Flatworm specimens were retrieved from marine beaches in Greenland (Nuuk), Svalbard (Longyearbyen), and Norway by collecting surf-zone sand and seawater in a bucket. In northern Norway, two locations were sampled – the in-fjord Telegrafbukta beach in Tromsø city, and the island of Sommarøy in the outermost archipelago. In Nuuk and Sommarøy, a sea water salinity measurement was taken using a Kern Optics analog refractometer. Flatworms were extracted from recovered sand by mixing it with a solution of 7% MgCl2 in sea water in an Erlenmeyer flask. The flask was turned upside down a couple of times before decanting the aqueous solution with suspended flatworms into a 63 µm sieve. The sieve was placed in a petri dish containing sea water before flatworms were manually picked out, and specimens of each species placed into separate embryo dishes using a glass Pasteur pipette. When practically possible, specimens were starved in clean seawater in a refrigerator for a few days before they were photographed under microscopes or stereo microscopes, depending on what was available at the sampling location.","methodSteps":["Flatworm specimens were retrieved from marine beaches in Greenland (Nuuk), Svalbard (Longyearbyen), and Norway by collecting surf-zone sand and seawater in a bucket. In northern Norway, two locations were sampled – the in-fjord Telegrafbukta beach in Tromsø city, and the island of Sommarøy in the outermost archipelago. In Nuuk and Sommarøy, a sea water salinity measurement was taken using a Kern Optics analog refractometer. Flatworms were extracted from recovered sand by mixing it with a solution of 7% MgCl2 in sea water in an Erlenmeyer flask. The flask was turned upside down a couple of times before decanting the aqueous solution with suspended flatworms into a 63 µm sieve. The sieve was placed in a petri dish containing sea water before flatworms were manually picked out, and specimens of each species placed into separate embryo dishes using a glass Pasteur pipette. When practically possible, specimens were starved in clean seawater in a refrigerator for a few days before they were photographed under microscopes or stereo microscopes, depending on what was available at the sampling location."]},"countryCoverage":[],"collections":[],"dataDescriptions":[],"dataLanguage":"eng","pubDate":"2025-08-29T00:00:00.000+00:00","maintenanceUpdateFrequency":"AS_NEEDED","maintenanceDescription":"","license":"http://creativecommons.org/licenses/by/4.0/legalcode","dwca":{"coreType":"http://rs.tdwg.org/dwc/terms/Occurrence","extensions":["http://rs.gbif.org/terms/1.0/Multimedia"],"modified":"2026-07-11T11:14:23.026+00:00"},"approximateCounts":{"occurrenceCount":55}}