| Species | Perforatus perforatus (an acorn barnacle) |
| Family | BALANIDAE (a family of acorn barnacles) |
| Superfamily | BALANOIDEA (a superfamily of crustaceans) |
| Suborder | BALANOMORPHA (a suborder of acorn barnacles) |
| Order | SESSILIA (acorn barnacles) |
| Superorder | THORACICA (acorn and goose barnacles) |
| Infraclass | Cirripedia (barnacles) |
| Subclass | THECOSTRACA (barnacles) |
| Class | MAXILLOPODA (a class of crustaceans) |
| Subphylum | CRUSTACEA (crustaceans) |
| Phylum | ARTHROPODA (arthropods) |
| Superphylum | ECDYSOZOA (skin shedders) |
| Clade | Bilateria (bilaterally symmetrical animals) |
| Subkingdom | EUMETAZOA (metazoans) |
| Kingdom | ANIMALIA (animals) |
| Domain | Eukaryota (eukaryotes) |
| Life | BIOTA (living things) |
| Records of Perforatus perforatus (an acorn barnacle) : | ||||
| 1: Perforatus perforatus (an acorn barnacle) | ||||
| 8 Apr 2012 | OSGR: SY67 | 50° 30’ N, 2° 30’ W | Vice County: Dorset (VC 9) | England |
| on rock exposed at low spring tide | ||||
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| 2: Perforatus perforatus (an acorn barnacle) | ||||
| 16 Mar 2008 | OSGR: SX04 | 50° 20’ N, 4° 50’ W | Vice County: East Cornwall (VC 2) | England |
| barnacles on mussel shell, washed up on beach | ||||
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Perforatus perforatus (an acorn barnacle) may be included in identification literature listed under the following higher taxa:
 NBN (data.nbn.org.uk)
has a distribution map for Perforatus perforatus (an acorn barnacle)
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 BioInfo (www.bioinfo.org.uk)
has 2 host/parasite/foodplant and/or other relationships for Perforatus perforatus (an acorn barnacle)
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