| Species aggregate | Polycera quadrilineata/norvegica (a species aggregate of molluscs) |
| Genus | Polycera (a genus of molluscs) |
| Subfamily | POLYCERINAE (a subfamily of molluscs) |
| Family | POLYCERIDAE (a family of sea slugs) |
| Superfamily | POLYCEROIDEA (a superfamily of molluscs) |
| Infraorder | Doridacea (a suborder of sea slugs) |
| Suborder | EUCTENIDIACEA (a suborder of molluscs) |
| Order | NUDIBRANCHIA (sea slugs) |
| Infraclass | Opisthobranchia (opisthobranchs) |
| Subclass | HETEROBRANCHIA (a subclass of molluscs) |
| Class | GASTROPODA (slugs and snails) |
| Phylum | MOLLUSCA (slugs, snails, bivalves, octopus, sea slugs) |
| Superphylum | LOPHOTROCHOZOA (molluscs and relatives) |
| Clade | Bilateria (bilaterally symmetrical animals) |
| Subkingdom | EUMETAZOA (metazoans) |
| Kingdom | ANIMALIA (animals) |
| Domain | Eukaryota (eukaryotes) |
| Life | BIOTA (living things) |
| Records of Polycera quadrilineata/norvegica (a species aggregate of molluscs) : | ||||
| 1: Polycera quadrilineata/norvegica (a species aggregate of molluscs) | ||||
| 21 Jan 2011 | OSGR: SY67 | 50° 40’ N, 2° 30’ W | Vice County: Dorset (VC 9) | England |
| in seaweed in rock pool at low tide | ||||
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Polycera quadrilineata/norvegica (a species aggregate of molluscs) may be included in identification literature listed under the following higher taxa:
 NBN (data.nbn.org.uk)
has a distribution map for Polycera quadrilineata/norvegica (a species aggregate of molluscs)
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 BioInfo (www.bioinfo.org.uk)
has 0 host/parasite/foodplant and/or other relationships for Polycera quadrilineata/norvegica (a species aggregate of molluscs)
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