Nektaspida (also called
Naraoiida,
Nectaspia and
Nectaspida) is an extinct
order of soft-bodied
arthropods proposed by Raymond in 1920; its taxonomic status is uncertain. Specimens are known from the early
Cambrian to the upper
Silurian periods.
Whittington (1985) placed the order in the
Trilobita. Cotton & Braddy (2000) place it in a new "Trilobite clade" containing the Trilobita, recognizing the close affinities of the nektaspids to trilobites. However this necessitates the inclusion of genera that look very little like trilobites. Strictly speaking, it is best placed in the stem-group to the chelicerates.