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- Hyperoartia abstract "Hyperoartia or Petromyzontida is a disputed group of vertebrates that includes the modern lampreys and their fossil relatives. Examples of hyperoartians from early in their fossil record are Endeiolepis and Euphanerops, fish-like animals with hypocercal tails that lived during the Late Devonian Period. Some paleontologists still place these forms among the "ostracoderms" (jawless armored "fishes") of the class Anaspida, but this is increasingly considered an artificial arrangement based on ancestral traits.Placement of this group among the jawless vertebrates is a matter of dispute. While today enough fossil diversity is known to make a close relationship among the "ostracoderms" unlikely, this has muddied the issue of the Hyperoartia's closest relatives. Traditionally the group was placed in a superclass Cyclostomata together with the Myxini (hagfishes). More recently, it has been proposed that the Myxini are more basal among the skull-bearing chordates, while the Hyperoartia are retained among vertebrates. But even though this may be correct, the lampreys represent one of the oldest divergences of the vertebrate lineage, and whether they are better united with some "ostracoderms" in the Cephalaspidomorphi, or not closer to these than to e.g. to other "ostracoderms" of the Pteraspidomorphi, or even the long-extinct conodonts, is still to be resolved. Even the very existence of the class Hyperoartia is disputed, with some analyses favoring a treatment of the "basal Hyperoartia" as a monophyletic lineage Jamoytiiformes that may in fact be very close to the ancestral jawed vertebrates.The only hyperoartians surviving today are lampreys, classified in the Petromyzontiformes. The discovery of the fossil Priscomyzon pushed back the oldest known occurrence of true lampreys to the Late Devonian. The evidence of phylogeny, however, suggests the lamprey lineage diverged much earlier from other vertebrates, rather than arising from among the "ostracoderms". The origin of Hyperoartia may therefore extend back to the early Paleozoic, if not earlier.Placed in this group are at present: Genus Jamoytius (fossil) Genus Endeiolepis (fossil) Genus Euphanerops (fossil) Order Petromyzontiformes – lampreys".
- Hyperoartia kingdom Animal.
- Hyperoartia phylum Chordate.
- Hyperoartia phylum Vertebrate.
- Hyperoartia synonym "Petromyzontida".
- Hyperoartia thumbnail Mayomyzon.svg?width=300.
- Hyperoartia wikiPageID "2369827".
- Hyperoartia wikiPageRevisionID "593145793".
- Hyperoartia classis "Hyperoartia".
- Hyperoartia date "December 2009".
- Hyperoartia fossilRange "Silurian - Recent".
- Hyperoartia hasPhotoCollection Hyperoartia.
- Hyperoartia imageCaption "Mayomyzon, a lamprey ancestor".
- Hyperoartia imageCaption "from the Early Carboniferous of Euramerica".
- Hyperoartia imageWidth "240".
- Hyperoartia phylum Chordate.
- Hyperoartia regnum "Animalia".
- Hyperoartia subphylum Vertebrate.
- Hyperoartia synonyms "Petromyzontida".
- Hyperoartia type "fish".
- Hyperoartia unrankedSubphylum Craniate.
- Hyperoartia subject Category:Vertebrates_without_jaws.
- Hyperoartia type AnimalTissue105267548.
- Hyperoartia type BodyPart105220461.
- Hyperoartia type Bone105269901.
- Hyperoartia type ConnectiveTissue105286536.
- Hyperoartia type Jaw105546040.
- Hyperoartia type Part109385911.
- Hyperoartia type PhysicalEntity100001930.
- Hyperoartia type Thing100002452.
- Hyperoartia type Tissue105267345.
- Hyperoartia type VertebratesWithoutJaws.
- Hyperoartia type Animal.
- Hyperoartia type Eukaryote.
- Hyperoartia type Species.
- Hyperoartia type Animal.
- Hyperoartia type BiologicalLivingObject.
- Hyperoartia type EukaryoticCell.
- Hyperoartia type Organism.
- Hyperoartia comment "Hyperoartia or Petromyzontida is a disputed group of vertebrates that includes the modern lampreys and their fossil relatives. Examples of hyperoartians from early in their fossil record are Endeiolepis and Euphanerops, fish-like animals with hypocercal tails that lived during the Late Devonian Period.".
- Hyperoartia label "Hyperoartia".
- Hyperoartia label "Hyperoartia".
- Hyperoartia label "Hyperoartia".
- Hyperoartia sameAs Hyperoartia.
- Hyperoartia sameAs Hyperoartia.
- Hyperoartia sameAs 칠성장어류.
- Hyperoartia sameAs m.0772jg.
- Hyperoartia sameAs Q188549.
- Hyperoartia sameAs Q188549.
- Hyperoartia sameAs Hyperoartia.
- Hyperoartia wasDerivedFrom Hyperoartia?oldid=593145793.
- Hyperoartia depiction Mayomyzon.svg.
- Hyperoartia isPrimaryTopicOf Hyperoartia.