Variable Risso

Rissoa variabilis (Megerle von Mühlfeld 1824)

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Rissoa variabilis (Variable Risso) is a species of snails in the family Rissoidae. They are surficial modifiers. They are detritivores. Individuals can grow to 8 mm. They have sexual reproduction. They are burrowers.

URI: https://eol.org/schema/terms/surficialModifier
Definition: bioturbating fauna with activities restricted to the sediment layer immediately below the sediment surface
Attribution: S. Lindqvist, Engelbrektsson, Eriksson, Hulth. 2016. Functional classification of bioturbating macrofauna in marine sediments using time-resolved imaging of particle displacement and multivariate analysis. Biogeosciences Discuss, 13 Oct. 2016. doi:10.5194/bg-2016-411.

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URI: http://wikidata.org/entity/Q2750657
Definition: organism that obtains nutrients by consuming detritus

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URI: http://purl.obolibrary.org/obo/GO_0019953
Definition: Capable of creating a new organism by combining the genetic material of two gametes, which may come from two parent organisms or from a single organism, in the case of self-fertilizing hermaphrodites.

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URI: http://polytraits.lifewatchgreece.eu/terms/MOB_BUR
Definition: An organism that lives or moves in a burrow in soft sediments.

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EOL has data for 20 attributes, including:

Body symmetry
- URI: http://eol.org/schema/terms/body_symmetry
- Definition: overall repetitive or reflective pattern in the body of one individual of this taxon. eg: bilateral symmetry, rotational symmetry, radial symmetry
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dextrally coiled
- URI: http://eol.org/schema/terms/dextrally_coiled
- Definition: in which the direction of the coil is dextral (right-handed)
- Attribution: https://en.wikipedia.org/wiki/Sinistral_and_dextral
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body length
- URI: http://purl.obolibrary.org/obo/CMO_0000013
- Definition: A measurement of the longest dimension of a body, typically between two distinct ends of the body.
- Attribution: [database_cross_reference: Dorland:Dorlands_Illustrated_Medical_Dictionary--31st_Ed] [database_cross_reference: ISBN:978-1416049982]
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8 mm
body volume
- URI: http://eol.org/schema/terms/BodyVolume
- Definition: Volume occupied by the whole body of one individual of this taxon
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0.139 cm^3
cellularity
- URI: http://purl.obolibrary.org/obo/PATO_0001992
- Definition: An organismal quality inhering in a bearer by virtue of the bearers consisting cells. [ PATOC:GVG ]
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multicellular
- URI: http://purl.obolibrary.org/obo/PATO_0001993
- Definition: A cellularity quality inhering in a bearer by virtue of the bearers consisting of more than one cell. [ PATOC:GVG ]
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ecosystem engineering
- URI: http://polytraits.lifewatchgreece.eu/terms/RW
- Definition: directly or indirectly modulating the availability of resources to other species, by causing physical state changes in biotic or abiotic materials; modifying, maintaining and/or creating habitats
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surficial modifier
- URI: https://eol.org/schema/terms/surficialModifier
- Definition: bioturbating fauna with activities restricted to the sediment layer immediately below the sediment surface
- Attribution: S. Lindqvist, Engelbrektsson, Eriksson, Hulth. 2016. Functional classification of bioturbating macrofauna in marine sediments using time-resolved imaging of particle displacement and multivariate analysis. Biogeosciences Discuss, 13 Oct. 2016. doi:10.5194/bg-2016-411.
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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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Strait Of Gibraltar
- URI: http://www.marineregions.org/mrgid/3346
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habitat
- URI: http://rs.tdwg.org/dwc/terms/habitat
- Definition: A category or description of the habitat in which the Event occurred.
- Comment: Example: "oak savanna", "pre-cordilleran steppe"
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marine benthic
- URI: http://purl.obolibrary.org/obo/ENVO_01000024
- Definition: The marine benthic biome (benthic meaning 'bottom') encompasses the seafloor and includes such areas as shores, littoral or intertidal areas, marine coral reefs, and the deep seabed.
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locomotion
- URI: http://purl.obolibrary.org/obo/GO_0040011
- Definition: Self-propelled movement of a cell or organism from one location to another.
- Attribution: [database_cross_reference: GOC:dgh]
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mucus mediated gliding
- URI: https://eol.org/schema/terms/mucus_gliding
- Definition: muscular waves propelling an animal over a mucus layer overlaying the substrate; alternating regions of muscular contraction and expansion create traveling waves that shear the mucus, resulting in translation of the animal.
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reproduction
- URI: http://purl.obolibrary.org/obo/GO_0000003
- Definition: The production of new individuals that contain some portion of genetic material inherited from one or more parent organisms
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sexual reproduction
- URI: http://purl.obolibrary.org/obo/GO_0019953
- Definition: Capable of creating a new organism by combining the genetic material of two gametes, which may come from two parent organisms or from a single organism, in the case of self-fertilizing hermaphrodites.
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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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grazer
- URI: http://www.wikidata.org/entity/Q37619060
- Definition: a consumer feeding on low growing organisms, eg: a herbivore that eats parts of low-growing grasses, forbs or algae.
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visual system
- URI: http://purl.obolibrary.org/obo/UBERON_0002104
- Definition: The sensory system subserving the sense of vision.
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lens eyes
- URI: https://eol.org/schema/terms/lens_eyes
- Definition: Relative to pinhole eyes, lens eyes have greatly improved resolution and image brightness. The lens converges incoming rays of light, thereby reducing the angle over which each photoreceptor receives light, and forming an image focused on the retina. Most lens eyes have "accommodation"; they can focus an image either by physically moving the lens toward or away from the retina or by using eye muscles to adjust the shape of the lens.
- Attribution: https://www.britannica.com/science/photoreception/Single-chambered-eyes#ref278819
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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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0.243 g

Known occurrences, collected specimens and observations of variable risso. View this species on GBIF

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