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Cheloniellida is a
taxon (usually
referred to as an order) of
extinct Paleozoic arthropods. As of 2018, 7
monotypic genera of
cheloniellids had been formally...
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Vicissicaudata is an
unranked group of artiopods,
containing Cheloniellida,
Aglaspidida and
several other genera outside these groups like
Sidneyia and...
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Trilobita †
Agnostida (possibly trilobites) †
Nektaspida †
Aglaspidida †
Cheloniellida † Bu****heia †
Erratus †
Fengzhengia † Fuxian****ida †
Isoxyida † Kiisortoqia...
- Bergstrom, 1997 †Strabopida Hou & Bergström, 1997 †Aglaspida Walcott, 1911 †
Cheloniellida Broili, 1932
Chelicerata Heymons 1901
Family †Sanctacarididae Legg &...
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Vicissicaudata †Xenopoda (possibly paraphyletic) †Sidneyia †Emeraldella †Etainia †Kodymirus †Eozetetes †Tardisia †Carimersa †
Cheloniellida †Aglaspidida...
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Tardisia broedeae Cheloniellida...
- and
respiratory function, respectively.
Cheloniellon is a
genus of
Cheloniellida, an
extinct arthropod taxon that have a
controversial phylogenetic position...
- †Archaeostraca
Order †Hoplostraca
Order Leptostraca Order †Emeraldellida
Order †
Cheloniellida Order †Sidneyiformes
Order †Acanthomeridiida
Order †Aglaspidida Order...
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Carimersa Emeraldella Eozetetes Kodymirus Sidneyia Tardisia?
Cheloniellida Cheloniellon Drabovaspis?
Duslia Neostrabops Paraduslia Pseudarthron Triopus...
- more
closely related to Aglaspidida,
Kodymirus and
Eozetetes than to
Cheloniellida,
Sidneyia or Emeraldella. Briggs,
Derek E. G.; Siveter,
David J.; Siveter...
