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- Craniidae abstract "The Craniidae are a family of brachiopods (lamp shells). Although it belongs to a subdivision called the inarticulata which have shells where the mineral content consist of calcium phosphate, the Craniidae have shells that consist of calcium carbonate. Other special characteristics of this family are that no outgrowths are developed to form a hinge between both valves, nor is there any support for the lophophore. As adults, craniids either lived free on the ocean floor or, more commonly, were attached to a hard object with all or part of the ventral valve. All other brachiopods are supposed to have a stalk or pedicle, at least as an adolescent, but in craniids a pedicle is not known from any development stage.They are the only members of the order Craniida and the monotypic suborder Craniidina and superfamily Cranioidea; consequently, the latter two taxa are presently redundant and not used very often. Valdiviathyris and Neoancistrocrania were sometimes separated in a family Valdiviathyrididae but this has turned out to be unjustified.Most Craniidae are long extinct forms known only from fossils like all other Craniforma. However, some 20 species of this 470-million-year-old lineage are surviving today. They include Valdiviathyris quenstedti which has remained essentially unchanged for the last 35 million years or so. Although some minimal evolution would obviously have taken place in the meantime, this was essentially silent mutations and marginal adaptations to cooler habitat. Present-day Valdiviathyris are all but inseparable from those of the Late Eocene and the genus cannot even be divided into chronospecies. Thus, V. quenstedti is a true living fossil and one of the oldest and most long-lived species known to science.".
- Craniidae thumbnail PetrocraniaOrdovician.jpg?width=300.
- Craniidae wikiPageID "13210543".
- Craniidae wikiPageLength "4383".
- Craniidae wikiPageOutDegree "45".
- Craniidae wikiPageRevisionID "666258496".
- Craniidae wikiPageWikiLink Acanthocrania.
- Craniidae wikiPageWikiLink Adaptation.
- Craniidae wikiPageWikiLink Adaptation_(biology).
- Craniidae wikiPageWikiLink Anatomical_terms_of_location.
- Craniidae wikiPageWikiLink Ancistrocrania.
- Craniidae wikiPageWikiLink Brachiopod.
- Craniidae wikiPageWikiLink Brachiopods.
- Craniidae wikiPageWikiLink Category:Brachiopods.
- Craniidae wikiPageWikiLink Category:Ordovician_first_appearances.
- Craniidae wikiPageWikiLink Chronospecies.
- Craniidae wikiPageWikiLink Conocrania.
- Craniidae wikiPageWikiLink Crania_(brachiopod).
- Craniidae wikiPageWikiLink Crania_(genus).
- Craniidae wikiPageWikiLink Craniforma.
- Craniidae wikiPageWikiLink Craniscus.
- Craniidae wikiPageWikiLink Danocrania.
- Craniidae wikiPageWikiLink Eocene.
- Craniidae wikiPageWikiLink Evolution.
- Craniidae wikiPageWikiLink Extant_taxon.
- Craniidae wikiPageWikiLink Extinct.
- Craniidae wikiPageWikiLink Extinction.
- Craniidae wikiPageWikiLink Family_(biology).
- Craniidae wikiPageWikiLink Fossil.
- Craniidae wikiPageWikiLink Genus.
- Craniidae wikiPageWikiLink Habitat.
- Craniidae wikiPageWikiLink Isocrania.
- Craniidae wikiPageWikiLink Lamp_shell.
- Craniidae wikiPageWikiLink Lepidocrania.
- Craniidae wikiPageWikiLink Living_fossil.
- Craniidae wikiPageWikiLink Monotypic.
- Craniidae wikiPageWikiLink Monotypic_taxon.
- Craniidae wikiPageWikiLink Nematocrania.
- Craniidae wikiPageWikiLink Neoancistrocrania.
- Craniidae wikiPageWikiLink Neontology.
- Craniidae wikiPageWikiLink Novocrania.
- Craniidae wikiPageWikiLink Order_(biology).
- Craniidae wikiPageWikiLink Ordovician.
- Craniidae wikiPageWikiLink Orthisocrania.
- Craniidae wikiPageWikiLink Petrocrania.
- Craniidae wikiPageWikiLink Philhedracrania.
- Craniidae wikiPageWikiLink Pseudocrania.
- Craniidae wikiPageWikiLink Silent_mutation.
- Craniidae wikiPageWikiLink Species.
- Craniidae wikiPageWikiLink Suborder.
- Craniidae wikiPageWikiLink Synonym_(taxonomy).
- Craniidae wikiPageWikiLink Taxa.
- Craniidae wikiPageWikiLink Taxon.
- Craniidae wikiPageWikiLink Taxonomic_rank.
- Craniidae wikiPageWikiLink Valdiviathyris.
- Craniidae wikiPageWikiLink Valdiviathyris_quenstedti.
- Craniidae wikiPageWikiLinkText "Craniidae".
- Craniidae wikiPageWikiLinkText "Craniids".
- Craniidae wikiPageWikiLinkText "Petrocrania".
- Craniidae authority "Menke, 1828".
- Craniidae displayParents "2".
- Craniidae grandparentAuthority "Waagen, 1885".
- Craniidae greatgrandparentAuthority "Waagen, 1885".
- Craniidae hasPhotoCollection Craniidae.
- Craniidae imageCaption "Petrocrania brachiopods attached to a strophomenid brachiopod; Upper Ordovician of southeastern Indiana.".
- Craniidae parentAuthority "Menke, 1828".
- Craniidae synonyms "Valdiviathyrididae".
- Craniidae taxon "Craniidae".
- Craniidae wikiPageUsesTemplate Template:Aut.
- Craniidae wikiPageUsesTemplate Template:Automatic_taxobox.
- Craniidae wikiPageUsesTemplate Template:Brachiopod-stub.
- Craniidae wikiPageUsesTemplate Template:Doi.
- Craniidae wikiPageUsesTemplate Template:Reflist.
- Craniidae subject Category:Brachiopods.
- Craniidae subject Category:Ordovician_first_appearances.
- Craniidae hypernym Family.
- Craniidae type Animal.
- Craniidae type Article.
- Craniidae type Eukaryote.
- Craniidae type Species.
- Craniidae type Article.
- Craniidae type Thing.
- Craniidae type Q19088.
- Craniidae type Q729.
- Craniidae comment "The Craniidae are a family of brachiopods (lamp shells). Although it belongs to a subdivision called the inarticulata which have shells where the mineral content consist of calcium phosphate, the Craniidae have shells that consist of calcium carbonate. Other special characteristics of this family are that no outgrowths are developed to form a hinge between both valves, nor is there any support for the lophophore.".
- Craniidae label "Craniidae".
- Craniidae sameAs Craniidae.
- Craniidae sameAs Kraniīdu_kārta.
- Craniidae sameAs m.03byzvt.
- Craniidae sameAs Craniidae.
- Craniidae sameAs Craniidae.
- Craniidae sameAs Q3272679.
- Craniidae sameAs Q3272679.
- Craniidae wasDerivedFrom Craniidae?oldid=666258496.
- Craniidae depiction PetrocraniaOrdovician.jpg.
- Craniidae isPrimaryTopicOf Craniidae.