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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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Trilobita †
Agnostida (possibly trilobites) †
Nektaspida †
Aglaspidida †
Cheloniellida † Bu****heia †
Erratus †
Fengzhengia † Fuxian****ida †
Isoxyida † Kiisortoqia...
- †Conciliterga †Xandarellida (=Petalopleura)
Vicissicaudata †Sidneyia †Emeraldella †Etainia †Kodymirus †Eozetetes †Tardisia †Carimersa †
Cheloniellida †Aglaspidida...
- Bergstrom, 1997 †Strabopida Hou & Bergström, 1997 †Aglaspida Walcott, 1911 †
Cheloniellida Broili, 1932
Chelicerata Heymons 1901
Family †Sanctacarididae Legg &...
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Vicissicaudata is an
unranked group of
artiopodan arthropods,
containing Cheloniellida,
Aglaspidida and
several other genera outside these groups like Sidneyia...
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Cheloniellida...
- like Sidneyia,
Emeraldella (both
formerly classified as "xenopods")
Cheloniellida, and Kodymirus,
based on
shared traits of the
organisation of the final...
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Cheloniellida...
- †Trilobita
Order †Aglaspida
Order †Strabopida
class Pycnogonida (?)
Order †
Cheloniellida Subphylum Chelicerata class Xiphosura class †Eurypterida
class †Chasmataspidida...
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Cheloniellida...
