Common Hermit Crab

Pagurus bernhardus (Linnaeus 1758)

Ecomare, Oscar Bos cc-by-nc

Pagurus bernhardus (Common Hermit Crab) is a species of decapods in the family Paguridae. They are native to Mediterranean Sea, Atlantic Ocean, and the Palearctic. They are solitary, nocturnal omnivores. Individuals can grow to 19.5 mm. They have parental care (female provides care). They rely on drag powered swimming to move around.

URI: http://www.marineregions.org/mrgid/1905

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URI: http://www.marineregions.org/mrgid/1902

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URI: https://www.wikidata.org/entity/Q106447
Definition: largest of the eight ecozones constituting the Earth's surface
Attribution: https://commons.wikimedia.org/wiki/File:Palearctic.png

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URI: http://www.wikidata.org/entity/Q164509
Definition: organism consuming a variety of foods, usually including both plants and animals

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URI: http://eol.org/schema/terms/solitary
Definition: Solitary animals are those that spend a majority of their lives without others of their species, with possible exceptions for mating and raising their young. Antonyms for a solitary animal include a social animal or a colonial animal.
Attribution: https://www.definitions.net/definition/solitary+animal

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URI: http://www.wikidata.org/entity/Q309179
Definition: animal behavior characterized by activity during the night and sleeping during the day

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URI: http://eol.org/schema/terms/parentalCareFemale
Definition: the female feeds and nurtures offspring
Attribution: Richard M. Sibly, Christopher C. Witt, Natalie A. Wright, Chris Venditti, Walter Jetz, and James H. Brown. 2012. Energetics, lifestyle, and reproduction in birds. PNAS 109(27):10937-10941, doi:10.1073/pnas.1206512109

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URI: https://eol.org/schema/terms/drag_based_swimming
Definition: Drag swimmers use a cyclic motion where they push water back in a power stroke, and return their limb forward in the return or recovery stroke. When they push water directly backwards, this moves their body forward, but as they return their limbs to the starting position, they push water forward, which will thus pull them back to some degree, and so opposes the direction that the body is heading. This opposing force is called drag. The return-stroke drag causes drag swimmers to employ different strategies than lift swimmers. Reducing drag on the return stroke is essential for optimizing efficiency.

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EOL has data for 32 attributes, including:

body shape
- URI: http://eol.org/schema/terms/BodyShape
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bilaterally symmetric
- URI: http://purl.obolibrary.org/obo/PATO_0001324
- Definition: being symmetric about a plane running from frontal end to caudal end (head to tail), and having nearly identical right and left halves
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chela width
- URI: http://eol.org/schema/terms/ChelaWidth
- Definition: a pincer-like organ terminating certain limbs of some arthropods
- Attribution: https://en.wikipedia.org/wiki/Chela_(organ)
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28.8 mm
diet includes
- URI: http://eol.org/schema/terms/Diet
- Definition: Information about the items eaten by this organism.
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worms
- URI: https://www.wikidata.org/entity/Q47253
- Definition: animals that typically have a long tube-like body
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ecomorphological guild
- URI: http://eol.org/schema/terms/EcomorphologicalGuild
- Definition: organisms that share certain morphological traits due to adaptation to similar environments and ecological roles
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epifaunal
- URI: http://www.marinespecies.org/traits/Epifaunal
- Definition: An animal living on the surface of the substratum.
- Attribution: http://www.marinespecies.org/traits/wiki/Traits:Epifaunal
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first appearance
- URI: http://eol.org/schema/terms/FossilFirst
- Definition: The first appearance of this taxon in the fossil record.
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11.62 million years ago
geographic distribution includes
- URI: http://eol.org/schema/terms/Present
- Definition: This organism is known to be present in this location or region. Not exclusive; other regions may also be reported.
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United States
- URI: http://www.geonames.org/6252001
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mating system
- URI: http://eol.org/schema/terms/MatingSystem
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promiscuous
- URI: http://purl.obolibrary.org/obo/ECOCORE_00000067
- Definition: A member of one sex mates with any member of the opposite sex
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native range includes
- URI: http://eol.org/schema/terms/NativeRange
- Definition: Lists jurisdictions in which a given organism is a member of the undisturbed fauna or flora.
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Mediterranean Sea
- URI: http://www.marineregions.org/mrgid/1905
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number of fossil occurrences
- URI: http://eol.org/schema/terms/fossilOccPBDB
- Definition: The number of fossil occurrences in the Paleobiology Database (https://paleobiodb.org) that are identified as belonging to a particular taxon or any of its subtaxa.
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3
social system
- URI: http://eol.org/schema/terms/SocialSystem
- Definition: Description of the relationships among individuals within a population of organisms, including reproductive relationships (mating system), relationships within each sex, adult – young interactions, helpers and cooperation (group living).
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group living
- URI: http://eol.org/schema/terms/socialGroupLiving
- Definition: where individuals of the same species (conspecifics), maintain spatial proximity with one another over time with mechanisms of social attraction
- Attribution: https://en.wikipedia.org/wiki/Group_living
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trophic guild
- URI: http://eol.org/schema/terms/TrophicGuild
- Definition: A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)
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invertivore
- URI: http://eol.org/schema/terms/invertivore
- Definition: An organism that feed on invertebrate animals (insects, crustaceans, molluscs, worms, etc.)
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wet body mass
- URI: http://eol.org/schema/terms/bodyMassWet
- Definition: Mass of one individual of this taxon, living or fresh, without desiccation
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125.451 g

Known occurrences, collected specimens and observations of Common hermit crab. View this species on GBIF

Ecomare, Oscar Bos cc-by-nc