f77d13e1-15c5-40ad-bb4f-210d13ab8b3a https://cloud.gbif.org/eca/resource?r=lake_district_meiofauna Nabil Majdi University of Toulouse Assistant-Professor

LRSV UMR 5546 Castanet-Tolosan F-66650 FR

nabil.majdi@espaces-naturels.fr n.majdi@hotmail.fr 0000-0001-7052-4297 Will Dawson Newcastle University; Fera Science Ltd, Biotech Campus, York

NE1 7RU Newcastle-upon-Tyne GB

w.dawson4@newcastle.ac.uk 0009-0003-2540-8467 Isobel Evans Loughborough University

LE11 3TU Loughborough GB

i.m.evans@lboro.ac.uk 0009-0005-1524-9751 Louise Thurston Loughborough University

LE11 3TU Loughborough GB

L.thurston@lboro.ac.uk Matylda Gajda Institute of Oceanology Polish Academy of Sciences

Powstańców Warszawy 55, 81-712 Sopot, Poland Sopot PL

gajdamatylda@gmail.com Andrea Lenti University of Bologna, Italy

Via Zamboni 33 40216, Bologna Bologna IT

andrea.lenti02@gmail.com Harry Smit Naturalis Biodiversity Center, Netheralnds

P.O. Box 9517, 2300 RA Leiden Leiden NL

harry.smit@naturalis.nl Diego Fontaneto National Research Council of Italy (CNR), Water Research Institute (IRSA), National Biodiversity Future Center (NBFC) Researcher

Largo Vittorio Tonolli 50 Verbania Verbania 28922 IT

diego.fontaneto@cnr.it 0000-0002-5770-0353 Lyudmila Kamburska National Research Council of Italy- Water Research Institute (CNR-IRSA); National Biodiversity Future Center (NBFC)

Largo Vittorio Tonolli 50 Verbania Verbania 28922 IT

lyudmilatodorova.kamburska@cnr.it https://www.researchgate.net/profile/Lyudmila-Kamburska 0000-0001-5071-6953 Wiktoria Dmuchowska Department of Animal Taxonomy and Ecology, Adam Mickiewicz University in Poznań, Poland

Poznań PL

wikdmu@st.amu.edu.pl Walter Traunspurger Bielefeld University, Animal Ecology, Germany

Konsequenz 45, 33615 Bielefeld Bielefeld DE

traunspurger@uni-bielefeld.de 0000-0002-9828-8430 Mateo Carvajal Animal Evolution and Biodiversity, Georg-August-Universität, Germany

Göttingen 37073 DE

mateo.carvajal@stud.uni-goettingen.de Christer Erseus Department of Biological and Environmental Sciences, University of Gothenburg, Sweden

Göteborg SE

christer.erseus@bioenv.gu.se Matthew Shepherd Natural England, Sterling House, UK

Dix's Field, Exeter EX1 1QA Exeter GB

matthew.j.shepherd@naturalengland.org.uk Alexander Kieneke German Center for Marine Biodiversity Research (DZMB), Senckenberg am Meer

Südstrand 44, 26, Wilhelmshaven, Germany Wilhelmshaven DE

alexander.kieneke@senckenberg.de André Rinaldo Senna Garraffoni Laboratório de Evolução de Organismos Meiofaunais, Departamento de Biologia Animal, Instituto de Biologia, State University of Campinas, Campinas

SP, 13083-970, Campinas Campinas BR

Witold Morek Tree of Life, Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge

Cambridge, CB10 1SA, UK Cambridge GB

wm6@sanger.ac.uk Ewan Shilland The Natural History Museum, London

Cromwell Road, London SW7 5BD, UK London GB

e.shilland@nhm.ac.uk Erik Tihelka Department of Earth Sciences, University of Cambridge

Cambridge CB2 3EQ, UK Cambridge GB

Vojtěch Broz Department of Ecology, Faculty of Science, Charles University

Prague CZ

brozvojt@natur.cuni.cz 0000-0002-3320-3934 Jaroslaw Brodecki Department of Invertebrate Zoology and Hydrobiology, Faculty of Biology and Environmental Protection, University of Lodz

Banacha St. 12/16, 90-237 Lodz, Poland Lodz PL

jaroslaw.brodecki@edu.uni.lodz.pl Giovane Murilo Ribeiro de Assis Vedovatti Laboratório de Evolução de Organismos Meiofaunais, Departamento de Biologia Animal, Instituto de Biologia, State University of Campinas

SP, 13083-970, Campinas Campinas BR

Clay Grant Bibby The University of Alabama in Huntsville

301 Sparkman Drive, Huntsville, AL 35899, USA Huntsville, AL US

claygbibby@gmail.com Katarzyna Tratkiewicz Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw

Warsaw PL

km.tratkiewicz@student.uw.edu.pl 0009-0007-1990-0307 Hannah King Department of Biology, University of Oxford

Oxford GB

h.king@soton.ac.uk Dylan Keene The Natural History Museum, London

Cromwell Road, London SW7 5BD, UK London GB

dylan.keene@nhm.ac.uk David Mark Wilkinson University of Lincoln

Lincoln GB

dwilkinson@lincoln.ac.uk Rony Huys The Natural History Museum

Cromwell Road, London SW7 5BD, UK GB

r.huys@nhm.ac.uk David Horne The Natural History Museum

Cromwell Road, London SW7 5BD, UK London GB

d.j.horne@qmul.ac.uk Hannah Budroe University of Georgia, Franklin College of Arts and Sciences, Department of Marine Sciences

325 Sanford Drive, Athens, GA 30602, USA Athens, GA US

hbudroe@uga.edu 0009-0008-7122-5684 Gill Notman University of Cumbria, Ambleside Campus, Ambleside, UK

Ambleside GB

Genoveva F. Esteban Bournemouth University, School of Life and Environmental Sciences

Poole, Dorset BH12 5BB, UK Dorset GB

gesteban@bournemouth.ac.uk 0000-0002-5805-8411 Kay Van Damme Department of Forest Botany, Dendrology and Geobiocoenology, Faculty of Forestry and Wood Technology, Mendel University

Lesnická 3, CZ-61300 Brno, Czechia Brno CZ

kay.vandamme@gmail.com 0000-0002-8215-3398 Srishti Arya School of Biological and Behavioural Sciences, Queen Mary University of London

London GB

s.arya@qmul.ac.uk srishti.arya@nhm.ac.uk 0009-0004-9258-9787 Christopher Laumer The Natural History Museum, London

Cromwell Road, London SW7 5BD, UK London GB

christopher.laumer1@nhm.ac.uk 0000-0001-8097-8516 Nabil Majdi University of Toulouse, LRSV UMR 5546 Associate Professor

Castanet-Tolosan F-66650 FR

n.majdi@hotmail.fr Diego Fontaneto National Research Council of Italy (CNR), Water Research Institute (IRSA), National Biodiversity Future Center (NBFC) Researcher

Largo Vittorio Tonolli 50 Verbania Verbania 28922 IT

diego.fontaneto@cnr.it 0000-0002-5770-0353 Lyudmila Kamburska National Research Council of Italy- Water Research Institute (CNR-IRSA); National Biodiversity Future Center (NBFC)

Largo Vittorio Tonolli 50 Verbania Verbania 28922 IT

lyudmilatodorova.kamburska@cnr.it https://www.researchgate.net/profile/Lyudmila-Kamburska 0000-0001-5071-6953 2026-02-12 eng The present dataset refers to all the records of meiofauna collected from the English Lake District (UK) and identified during the First freshwater meiofauna workshop from 27th August to 11th September 2025, organised by the National History Museum of London. The data were structured based on the Darwin Core standard (Wieczorek et al., 2012). The dataset includes 299 occurrence records of 209 distinct taxa of meiofauna belonging to 46 families, 24 orders and 8 major taxonomic groups. More, two new species (Tardigrades) were found in the Lake District , a region of exceptional ecological and biogeographical interest. This dataset is integral part of the paper "Freshwater and limno-terrestrial meiofauna of the Lake District, UK" by Majdi et al., submitted to Biogeographia. Occurrence GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml Specimen GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC 4.0) License. Creative Commons Attribution Non Commercial 4.0 International https://spdx.org/licenses/CC-BY-NC-4.0.html CC-BY-NC-4.0 https://cloud.gbif.org/eca/archive.do?r=lake_district_meiofauna Lake District Biogeographic region: Western Palearctic region Country: England, United Kingdom -3.407 -2.834 54.539 54.23 2025-08-28 2025-08-31 meiofauna family Naididae phylum Arthropoda phylum Tubulinea class Oligohymenophorea family Trinematidae family Blepharismidae family Dorylaimidae family Aturidae family Lepadellidae class Ostracoda family Pionidae kingdom Chromista family Limnocytheridae order Sarcoptiformes phylum Rotifera order Prorhynchida order Harpacticoida family Euzetidae class Torquentia class Clitellata family Xyalidae class Colpodea family Adinetidae family Monhysteridae order Philodinida family Lumbriiculidae order Euplotida order Haptorida family Chromadoridae family Centropyxidae order Echiniscoidea family Hydrozetidae family Colpodidae phylum Annelida order Enchytraeida family Actinolaimidae family Canthocamptidae class Tubulinea order Adinetida family Aporcelaimidae family Habrotrochidae class Penetrantia order Podocopida family Macrobiotidae class Arachnida order Peniculida order Chromadorida family Hygrobatidae family Tripylidae order Enoplida phylum Amoebozoa family Euchlanidae class Spirotrichea family Dasydytidae family Daphniidae family Hyalospheniidae family Echiniscidae family Sperchontidae class Imbricatea class Oligotrichea order Colpodida order Mobilida order Euglyphida order Urostylida family Macrostomidae family Ilyocryptidae order Euglenales family Epistylidae family Euglenaceae family Cyclopidae order Hypotrichia phylum Gastrotricha phylum Cercozoa family Ironidae order Mononchida class n.a. family Typhloplana order Heterotrichida order Tubificida family Mononchidae family Parameciidae family Limnozetidae family Chydoridae family Flosculariidae family Frontoniidae class Rhabditophora family Polyphemidae family Isohypsibiidae family Lebertiidae order Ophryoglenida family Prorhynchidae family Eurycercidae family Catenulidae order Halteriia family Euplotidae order Catenulida family Bosminidae order Chaetonotida family Thyrisomidae order Dorylaimida class Eurotatoria family Piersigiidae order Ploima family Arrenuridae family Platyophryidae family Stentoridae family Qudsianematidae kingdom Animalia family Plectidae phylum Tardigrada order Parachela class Heterotardigrada family Sididae family Limnesiidae phylum Platyhelminths family Euglyphidae family Torrenticolidae order Rhabdocoela order Triciadida kingdom Protozoa order Lumbriculida class Catenulida family Geoplanidae class Oligohymenophora family Stenostomidae family Spathidiidae order Cyrtolophosidida phylum Nematoda order Philodinavida class Euglenozoa family Halteriidae family Philodinavidae family Calohypsibiidae class Litostomatea family Milnesiidae family Polycystididae family Mylonchulidae family Lumbricidae phylum Euglenozoa family Chaetonotidae class Heterotrichea class Copepoda class Elardia family Hydrodromidae family Acantholeberidae family Cyatholaimidae family Nanhermanniidae order Flosculariaceae family Phthiracaridae family Oxytrichidae family Brachionidae family Philodinidae family Trichodinidae family Turaniellidae family Urostylidae order Diplostraca order Araeolaimidae family Cyprididae family Aspidiscidae family Hypsibiidae family Tryphloplanidae family Macrothricidae order Peritrichida family Murrayidae family Enchytraeidae order Trombidiformes order Cyclopoida class Branchiopoda family Doryphoribidae order Tetrahymenida order Monhysterida family Dicranophoridae phylum Ciliophora class Eutardigrada order Opisthopora family Ophryoglenidae order Arcellinida order Apochela Dr. Christopher E Laumer was awarded by NERC, UK with a training grant for the Project "Taxonomy and natural history of freshwater meiofauna: classical and contemporary expertise- sharing in a field workshop setting" (UKRI1312APP56720). CL is also funded by a Royal Society University Research Fellowship, award no. URF\R1\221744. Andre R. S. Garraffoni received the financial support from “Fundação de Amparo à Pesquisa do Estado de São Paulo” (process number: 2023/05724-9). notPlanned Nabil Majdi University of Toulouse, LRSV UMR 5546

Castanet-Tolosan F-66650 FR

n.majdi@hotmail.fr Christopher Laumer The Natural History Museum, London

Cromwell Road, London SW7 5BD, UK London GB

christopher.laumer1@nhm.ac.uk 0000-0001-8097-8516 Lyudmila Kamburska National Research Council of Italy- Water Research Institute (CNR-IRSA); National Biodiversity Future Center (NBFC)

Verbania Verbania 28922 IT

lyudmilatodorova.kamburska@cnr.it 0000-0001-5071-6953 Substrates for freshwater habitats from where meiofauna was extracted included submerged mosses in running and standing waters, wet sediments, macrophytes, periphyton, biofilms and plankton. Of the taxa reported in the current dataset, 58 belonged to Arthropoda (28%), 33 were Rotifera (16%), 30 were heterotrophic unicellular eukaryotes (14%), 26 were Nematoda (12%), 20 were Annelida (10%), 19 were Tardigrada (9%), 12 were Gastrotricha (6%) and 11 were Platyhelmints (5%). Moss samples returned the highest number of taxa occurences (136), followed by periphyton (54), epipsammon (34), interstitial (25), plankton (17), peat bogs (16), forest litter (7), soil (6), epizooic on gammarids (2), lichen (2). The general strategy was to obtain samples from all the types of habitat where freshwater and limno-terrestrial meiofauna can be found, covering habitats within the Lake District area. All identified organisms during the survey, with data from variety and subspecies levels to species, genus, and family rank were included in the dataset. Samples were collected in the field using various methods. In total 60 different samples were collected from 27 different sites, representatives of a wide range of ecosystems, substrates, and micro-habitat types found in the Lake District area (UK). The applied methods for meiofauna extraction from the samples and identification under the microscope varied depending on taxonomic groups. Taxonomic identifications were performed on living individuals, to species-level whenever possible, or to the nearest reliable rank by the expert taxonomists involved in the faunistic survey. Nomenclature validation and cleaning were based on WoRMs (Horton et al., 2017) and on the GBIF taxonomic backbone (GBIF Backbone Taxonomy, 2023). Nabil Majdi originator The present dataset refers to all the records of meiofauna collected and identified during an identification workshop from 27th August to 11th September 2025, organised by the National History Museum of London. Lake District, UK The general strategy was to collect samples from all the types of habitat where freshwater and limno-terrestrial meiofauna within the Lake District area (UK) and identified during the First freshwater meiofauna workshop(27.08-11.09), organised by the National History Museum of London in 2025. The dataset includes 299 occurrence records of 209 distinct taxa of meiofauna belonging to 46 families, 24 orders and 8 major taxonomic groups. More, two new species (Tardigrades) were found in the Lake District , a region of exceptional ecological and biogeographical interest. This dataset is integral part of the paper "Freshwater and limno-terrestrial meiofauna of the Lake District, UK" by Majdi et al., submitted to Biogeographia. 2025-12-16T09:51:25.416+00:00 dataset Majdi N, Dawson W, Evans I, Thurston L, Gajda M, Lenti A, Smit H, Fontaneto D, Kamburska L, Dmuchowska W, Traunspurger W, Carvajal M, Erseus C, Shepherd M, Kieneke A, Garraffoni A R S, Morek W, Shilland E, Tihelka E, Broz V, Brodecki J, Vedovatti G M R D A, Bibby C G, Tratkiewicz K, King H, Keene D, Wilkinson D M, Huys R, Horne D, Budroe H, Notman G, Esteban G F, Van Damme K, Arya S, Laumer C (2026). Lake District meiofauna Workshop records. Version 1.6. Consiglio Nazionale delle Ricerche - Istituto di Ricerca sulle Acque. Occurrence dataset. https://cloud.gbif.org/eca/resource?r=lake_district_meiofauna&v=1.6 Wieczorek J, Bloom D, Guralnick R, Blum S, Döring M, et al. (2012). Darwin Core: An Evolving Community-Developed Biodiversity Data Standard. PLOS ONE 7(1): e29715. Horton T, Gofas S, Kroh A, Poore G C, Read G, Rosenberg G, Stöhr S, Bailly N, Boury-Esnault N, Brandão S ., Costell, M J, Decock W, Dekeyzer S, Hernandez F, Mees J, Paulay G, Vandepitte L, Vanhoorne B, & Vranken S (2017). Improving nomenclatural consistency: a decade of experience in the World Register of Marine Species. European Journal of Taxonomy, (389). GBIF Secretariat (2023). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2025-12-08 Majdi N, Dawson W, Evans I, Thurston L, Gajda M, Lenti A, Smith H, Fontaneto D, Kamburska L, Dmuchowska W, Traunspurger W, Carvajal M, Erseus C, Shepherd M, Kieneke A, Garraffoni A R S, Morek W, Shilland E, Tihelka E, Broz V, Brodecki J, Vedovatti G M R D A, Bibby C G, Tratkiewicz K, King H, Keene D, Wilkinson D M, Huys R, Horne D, Budroe H, Notman G, Esteban G F, Van Damme K, Arya S, Laumer C (2025). Freshwater and limno-terrestrial meiofauna of the Lake District, UK" submitted to Biogeographia. f77d13e1-15c5-40ad-bb4f-210d13ab8b3a/v1.6.xml