Pagurus bernhardus (Linnaeus, 1758)
(Hermit Crab)

Taxonomic hierarchy:
SpeciesPagurus bernhardus (Hermit Crab)
GenusPagurus (a genus of hermit crabs)
FamilyPAGURIDAE (hermit crabs)
SuperfamilyPAGUROIDEA (a superfamily of crustaceans)
InfraorderAnomura (an infraorder of decapod crustacea)
SuborderPLEOCYEMATA (a suborder of crustaceans)
OrderDECAPODA (crabs, shrimps, lobsters etc.)
SuperorderEUCARIDA (crab, shrimps, lobsters etc.)
SubclassEUMALACOSTRACA (a subclass of crustaceans)
ClassMALACOSTRACA (crabs, lobsters, shrimps, prawns, woodlice etc.)
SubphylumCRUSTACEA (crustaceans)
PhylumARTHROPODA (arthropods)
SuperphylumECDYSOZOA (skin shedders)
CladeBilateria (bilaterally symmetrical animals)
SubkingdomEUMETAZOA (metazoans)
KingdomANIMALIA (animals)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
Records of Pagurus bernhardus (Hermit Crab) :
1: Pagurus bernhardus (Hermit Crab)
21 Mar 2008 OSGR: SW83 50° 10’ N, 4° 60’ W Vice County: East Cornwall (VC 2) England
Juvenile hermit crab in shell in pool on foreshore
Image 1: Carapace - dorsal view - close-up - highly enlargedImage 2: Crab extracted shell (dead specimen) - dorsal view - close-up - highly enlargedImage 3: Crab extracted shell (dead specimen) - dorsal view - enlargedImage 4: Crab in shell (dead specimen) - dorsal view - enlargedImage 5: Crab in shell (dead specimen) - lateral view - enlargedImage 6: Legs - dorsal view - close-up - highly enlarged
2: Pagurus bernhardus (Hermit Crab)
7 Apr 1969 OSGR: TQ30 50° 50’ N, 0° 10’ W Vice County: East Sussex (VC 14) England
originally from rocky shore, but kept in marine aquarium
Image 1: Hermit crab without shell

Identification Works

AuthorYearTitleSource
Lancaster, I. 1988 Pagurus bernhardus (L.) - an introduction to the natural history of hermit crabs Field Studies 7(1): 189-238.

Pagurus bernhardus (Hermit Crab) may also be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Pagurus bernhardus (Hermit Crab)
BioInfoBioInfo (www.bioinfo.org.uk) has 5 host/parasite/foodplant and/or other relationships for Pagurus bernhardus (Hermit Crab)

Our commonest hermit crab, especially smaller ones on the shore.

The outside of the shell may carry Calliactis parasitica sea anemone or Hydractinia echinata hydroid. The shell may contain Neanthes (Nereis) fucata polychaete, or Trypetesa lampas, a barnacle that burrows into the columella of the body whorl. Rhizocephalan parasites include Clistosaccus paguri and Peltogaster curvatus.

This is the only species with non-hairy claws and two lines of tubercles running down the fixed part of the claw. A right-handed species.

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