BIOTIC Species Information for Grania spp.
Researched bySean Lindsley-Leake Data supplied byMarLIN
Refereed byThis information is not refereed
Scientific nameGrania spp. Common nameAn oligochaete worm
MCS CodeP1524 Recent Synonyms

PhylumAnnelida Subphylum
Superclass ClassOligochaeta
Subclass OrderHaplotaxida
SuborderTubificina FamilyEnchytraeidae
GenusGrania Species

Additional Information
Taxonomy References Locke & Coates, 1998,
General Biology
Growth form Feeding method
Environmental position
Typical food types HabitFree living
Bioturbator FlexibilityHigh (>45 degrees)
FragilityIntermediate SizeVery small(<1cm)
Heightnot relevant Growth Rate
Adult dispersal potential Dependency
General Biology Additional Information
Biology References Coates & Erseus, 1985, Locke & Coates, 1998, Barnes et al., 2001,
Distribution and Habitat
Distribution in Britain & Ireland
Global distribution
Biogeographic range Depth range
Distribution Additional Information

Substratum preferences Physiographic preferences
Biological zone Wave exposure
Tidal stream strength/Water flow Salinity
Habitat Preferences Additional Information
Distribution References
Reproduction/Life History
Reproductive typePermanent hermaphrodite
Developmental mechanismInsufficient information
Reproductive SeasonInsufficient information Reproductive LocationAs adult
Reproductive frequencyInsufficient information Regeneration potential Yes
Life spanInsufficient information Age at reproductive maturityInsufficient information
Generation timeInsufficient information Fecundity6-11
Egg/propagule size5-25 µm Fertilization typeInternal
Larval/Juvenile dispersal potentialInsufficient information Larval settlement periodInsufficient information
Duration of larval stageInsufficient information   
Reproduction Preferences Additional Informationsimultaneous hermaphrodites, some occasional schyzogenesis (reproduction by spontaneous fission) in some forms.
Reproduction References Coates & Erseus, 1985, Rota & Erseus, 2003, Locke & Coates, 1998,
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