Amethyst Gem Clam

Gemma gemma (Totten 1834)

Tom Walker cc-by-nc-4.0

Gemma gemma (Amethyst Gem Clam) is a species of mussels in the family venus clams. They are native to Mexico, Canada, and United States. Individuals can grow to 5 mm. They have sexual reproduction. They are facultatively mobile animals.

URI: http://www.geonames.org/3996063

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URI: http://www.geonames.org/6251999

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URI: http://www.geonames.org/6252001

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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://eol.org/schema/terms/facultativelyMobile
Definition: Organisms that can change location but do so infrequently, e.g., crinoids, some infaunal bivalves.
Attribution: http://paleodb.org/public/tips/ecology_tips.html

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EOL has data for 39 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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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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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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0.064 cm^3
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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infaunal
- URI: http://www.marinespecies.org/traits/Infaunal
- Definition: Benthic animals which live within the seabed.
- Attribution: http://www.marinespecies.org/traits/wiki/Traits:Infaunal
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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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2.588 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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California
- URI: http://www.geonames.org/5332921
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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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Mexico
- URI: http://www.geonames.org/3996063
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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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21
shell height, bivalve
- URI: http://eol.org/schema/terms/ShellHeightBivalve
- Definition: Height (shorter dimension in the plane of the valve) of the shell of a Bivalve
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4.69 mm
shell length, bivalve
- URI: http://eol.org/schema/terms/ShellLengthBivalve
- Definition: Length (longest dimension) of the shell of a Bivalve.
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5 mm
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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suspension feeder
- URI: http://eol.org/schema/terms/suspensionFeeder
- Definition: An organism which feeds on organisms and/or particles suspended in the water column.
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type specimen repository
- URI: http://eol.org/schema/terms/TypeSpecimenRepository
- Definition: The institution that holds a type specimen for a given species. The recommended best practice is to use the identifier in a collections registry such as the Biodiversity Collections Index (http://www.biodiversitycollectionsindex.org/).
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Harvard University, Museum of Comparative Zoology
- URI: http://biocol.org/urn:lsid:biocol.org:col:33791
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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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0.111 g

Known occurrences, collected specimens and observations of Amethyst gem clam. View this species on GBIF

Tom Walker cc-by-nc-4.0