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About: Bucanellidae     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : umbel-rc:Mollusk, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: ThingEukaryoteAnimalMolluscaanimaleukaryotemolluscaspeciesyago:Animal100015388yago:Gastropod101942177yago:Invertebrate101905661yago:LivingThing100004258yago:Mollusk101940736yago:Object100002684yago:Organism100004475yago:PhysicalEntity100001930yago:Whole100003553yago:WikicatExtinctGastropodsyago:WikicatPrehistoricMolluscsumbel-rc:Mollusk New Facet based on Instances of this Class

Bucanellidae is an extinct family of Paleozoic molluscs of uncertain position, belonging either to Gastropoda (snails) or Monoplacophora. The family lived from the upper Cambrian to middle Permian and the shells are characterized by a relatively small median sinus in the upper margin of the aperture, and collabral (transverse) or spiral (longitudinal) threads covering the shell. The shells are planispirally coiled (flat coiled) rather than trochospirally with a spire as is the case with most shelled gastropods.