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- Astraspida abstract "Astraspida, or astraspids, are a small group of extinct armored jawless vertebrates, which lived in the Middle Ordovician (about 450 million years ago) in North America. They are placed among the Pteraspidomorphi because of the large dorsal and ventral shield of their head armor. They are represented by a single genus, Astraspis, including possibly two species, A. desiderata and A. splendens but their remains are fairly abundant in Ordovician sandstones of the USA (Colorado, Arizona, Oklahoma, Wyoming) and Canada (Quebec). The head armor of Astraspis is rather massive, with a series of ten gill openings lining the margin of the dorsal shield, and laterally placed eyes. The dorsal shield is ribbed by strong longitudinal crests, and the tail is covered with large, diamond-shaped scales. They are often grouped together with the Arandaspidida.".
- Astraspida class Pteraspidomorphi.
- Astraspida kingdom Animal.
- Astraspida phylum Chordate.
- Astraspida thumbnail Astraspis_desiderata.gif?width=300.
- Astraspida wikiPageID "8609454".
- Astraspida wikiPageLength "3538".
- Astraspida wikiPageOutDegree "21".
- Astraspida wikiPageRevisionID "701734644".
- Astraspida wikiPageWikiLink Animal.
- Astraspida wikiPageWikiLink Arandaspida.
- Astraspida wikiPageWikiLink Arizona.
- Astraspida wikiPageWikiLink Astraspidiformes.
- Astraspida wikiPageWikiLink Astraspis.
- Astraspida wikiPageWikiLink Category:Ordovician_fish.
- Astraspida wikiPageWikiLink Category:Pteraspidomorphi.
- Astraspida wikiPageWikiLink Chordate.
- Astraspida wikiPageWikiLink Colorado.
- Astraspida wikiPageWikiLink Eriptychiida.
- Astraspida wikiPageWikiLink Heterostraci.
- Astraspida wikiPageWikiLink Lev_Berg.
- Astraspida wikiPageWikiLink Oklahoma.
- Astraspida wikiPageWikiLink Ordovician.
- Astraspida wikiPageWikiLink Pteraspidomorphi.
- Astraspida wikiPageWikiLink Quebec.
- Astraspida wikiPageWikiLink Tesakoviaspidida.
- Astraspida wikiPageWikiLink Wyoming.
- Astraspida wikiPageWikiLinkText "Astraspida".
- Astraspida wikiPageWikiLinkText "astraspids".
- Astraspida classis "†Pteraspidomorphi".
- Astraspida fossilRange Ordovician.
- Astraspida imageCaption "An Astraspis".
- Astraspida ordo "Astraspida".
- Astraspida ordoAuthority "Berg, 1940".
- Astraspida phylum Chordate.
- Astraspida regnum "Animalia".
- Astraspida subclassis "†Heterostracomorphi".
- Astraspida subdivision "†Astraspidiformes (Berg, 1940)".
- Astraspida subdivision "†Tesakoviaspidida (Talimaa & Moya, 2004)".
- Astraspida subdivisionRanks "Subgroups".
- Astraspida wikiPageUsesTemplate Template:Ordovician-stub.
- Astraspida wikiPageUsesTemplate Template:Pteraspidomorphi-stub.
- Astraspida wikiPageUsesTemplate Template:Reflist.
- Astraspida wikiPageUsesTemplate Template:Taxobox.
- Astraspida subject Category:Ordovician_fish.
- Astraspida subject Category:Pteraspidomorphi.
- Astraspida hypernym Group.
- Astraspida type Animal.
- Astraspida type Band.
- Astraspida type Eukaryote.
- Astraspida type Species.
- Astraspida type Jaw.
- Astraspida type Thing.
- Astraspida type Q19088.
- Astraspida type Q729.
- Astraspida comment "Astraspida, or astraspids, are a small group of extinct armored jawless vertebrates, which lived in the Middle Ordovician (about 450 million years ago) in North America. They are placed among the Pteraspidomorphi because of the large dorsal and ventral shield of their head armor. They are represented by a single genus, Astraspis, including possibly two species, A. desiderata and A.".
- Astraspida label "Astraspida".
- Astraspida sameAs Q14524396.
- Astraspida sameAs اخترسپران.
- Astraspida sameAs m.073g77.
- Astraspida sameAs Q14524396.
- Astraspida wasDerivedFrom Astraspida?oldid=701734644.
- Astraspida depiction Astraspis_desiderata.gif.
- Astraspida isPrimaryTopicOf Astraspida.
