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The British material is here fully described and illustrated with SEMs and colour photographs; some unusual characters are discussed. Unlike other recently introduced bryozoans, S. japonica is a cold-water species and its breeding season in Britain extends through the winter. Extensive confusion between this and other species of Schizoporella on the west coast of Canada and the USA led us to make thorough morphometric comparisons between the species concerned (Schizoporella unicornis (Johnston in Wood), Schizoporella errata (Waters) and Schizoporella pseudoerrata Soule, Soule and Chaney). Zooid size in cheilostomate bryozoans is variable and often an unreliable character for species separation but shape (and therefore ratios between variables,which are independent of size) are often valuable: S. japonica zooids have a much greater length:width ratio than the other species. Density of frontal pseudopores provides a useful discriminatory character. Schizoporella unicornis, repeatedly reported in error from the Pacific coast of North America, does not occur there; it is a European species. Full comparisons are made between S. japonica and S. unicornis for European identification and between S. japonica, S. errata and S. pseudoerrata (which are also illustrated) for North American localities.", "includedInDataCatalog": { "@id": "http://portal.medin.org.uk/portal/json-ld/catalog.jsonld" }, "conditionsOfAccess": [ "otherRestrictions: Open access" ], "distribution": [ { "@type": "DataDownload", "name": "DOI link", "contentUrl": "https://doi.org/10.17031/666869f77647f" } ], "temporalCoverage": "2010-07-01/2013-01-31", "keywords": [ { "@type": "DefinedTerm", "identifier": "http://vocab.nerc.ac.uk/collection/N01/current/NDGO0001/", "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/N01/current/", "termCode": "NDGO0001", "name": "Marine Environmental Data and Information Network" }, { "@type": "DefinedTerm", "identifier": "http://vocab.nerc.ac.uk/collection/N01/current/accepted/", "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/N01/current/", "termCode": "accepted", "name": "NDGO0005" }, { "@type": "DefinedTerm", "identifier": "http://vocab.nerc.ac.uk/collection/P22/current/32/", "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/P22/current/", "termCode": "32", "name": "Species distribution" }, { "@type": "DefinedTerm", "identifier": "http://vocab.nerc.ac.uk/collection/P02/current/MFAB/", "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/P02/current/", "termCode": "MFAB", "name": "Zoobenthos generic abundance" }, { "@type": "DefinedTerm", "name": "Biodiversity" } ], "spatialCoverage": [ { "@type": "Place", "geo": { "@type": "GeoShape", "box": "58.5789 -4.1266 59.5948 -1.9074" }, "name": { "@type": "DefinedTerm", "identifier": "http://vocab.nerc.ac.uk/collection/C19/current/1_4/", "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/C19/current/", "termCode": "1_4", "name": "Irish Sea" }, "additionalProperty": [ { "@type": "PropertyValue", "propertyID": "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "value": "urn:ogc:def:crs:EPSG:4326" } ] }, { "@type": "Place", "geo": { "@type": "GeoShape", "box": "53.0733 -5.0495 53.5133 -3.9234" }, "name": { "@type": "DefinedTerm", "identifier": "http://vocab.nerc.ac.uk/collection/C19/current/1_4/", "inDefinedTermSet": "http://vocab.nerc.ac.uk/collection/C19/current/", "termCode": "1_4", "name": "Irish Sea" }, "additionalProperty": [ { "@type": "PropertyValue", "propertyID": "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "value": "urn:ogc:def:crs:EPSG:4326" } ] } ], "maintainer": [ { "@type": "Organization", "name": "Data Archive for Seabed Species and Habitats (DASSH)", "description": "custodian", "email": "dassh.enquiries@mba.ac.uk", "telephone": "01752 633102", "faxNumber": "01752 633291", "address": { "@type": "PostalAddress", "streetAddress": "Marine Biological Association of the UK,\r\n The Laboratory,\r\n Citadel Hill", "postalCode": "PL1 2PB", "addressLocality": "Plymouth" } } ], "producer": [ { "@type": "Organization", "name": "University of Wales Swansea, Natural Sciences", "description": "originator", "email": "dassh.enquiries@mba.ac.uk", "address": { "@type": "PostalAddress", "streetAddress": "Singleton Park", "postalCode": "SA2 8PP", "addressLocality": "Swansea" } } ], "publisher": [ { "@type": "Organization", "name": "Data Archive for Seabed Species and Habitats (DASSH)", "description": "pointOfContact", "email": "dassh.enquiries@mba.ac.uk", "telephone": "01752 633102", "faxNumber": "01752 633291", "address": { "@type": "PostalAddress", "streetAddress": "Marine Biological Association of the UK,\r\n The Laboratory,\r\n Citadel Hill", "postalCode": "PL1 2PB", "addressLocality": "Plymouth" } } ], "provider": [ { "@type": "Organization", "name": "Data Archive for Seabed Species and Habitats (DASSH)", "description": "distributor", "email": "dassh.enquiries@mba.ac.uk", "telephone": "01752 633102", "faxNumber": "01752 633291", "address": { "@type": "PostalAddress", "streetAddress": "Marine Biological Association of the UK,\r\n The Laboratory,\r\n Citadel Hill", "postalCode": "PL1 2PB", "addressLocality": "Plymouth" } } ], "creator": [ { "@type": "Organization", "name": "University of Wales Swansea, Natural Sciences", "description": "originator", "email": "dassh.enquiries@mba.ac.uk", "address": { "@type": "PostalAddress", "streetAddress": "Singleton Park", "postalCode": "SA2 8PP", "addressLocality": "Swansea" } } ], "sdPublisher": { "@type": "Organization", "url": "https://portal.medin.org.uk/portal/", "name": "Marine Environmental Data and Information Network (MEDIN)", "description": "The MEDIN portal contains information about 19493 marine datasets from over 600 UK organisations. Metadata are an enduring resource and contact details are publicly available for a long time. \r\n\t\tPlease contact us (enquiries@medin.org.uk) if you find your contact details on the MEDIN portal and do not consent to this. \r\n\t\tYou can now use our GitHub repository to report issues or access related documents. Metadata records are updated daily and were last updated 2026-04-19. Record deletion takes place weekly and the latest occurred 2026-04-12." } }