Naraoia compacta fossils with preserved appendages
Scientific classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Arthropoda
Subphylum:
†Trilobitomorpha
Order:
†Nektaspida Raymond, 1920
Families[1]
†Emucarididae
†Liwiidae
†Naraoiidae
†Petalopleura?
†Buenaspis
†Campanamuta?
†Panlongia?
†Phytophylaspis?
†Saperion?
†Tegopelte?
Nektaspida (also called Naraoiida, Nektaspia and Nectaspida) is an extinct order of non-mineralised artiopodan arthropods. They are known from the mid-Cambrian to the upper Silurian. Originally classified as trilobites, which they superficially resemble, they are now placed as close relatives as members of the Trilobitomorpha within Artiopoda. The order is divided into three major families; Emucarididae, Liwiidae, and Naraoiidae.
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Nektaspida (also called Naraoiida, Nektaspia and Nectaspida) is an extinct order of non-mineralised artiopodan arthropods. They are known from the mid-Cambrian...
Restoration of the trilobite Triarthrus eatoni Fossils of Naraoia compacta (Nektaspida) Life restoration of Sidneyia (Vicissicaudata) Diagram of Sinoburius (Xandarellida)...
referred to as the Chengjiang biota. 80 species, not counting Dinocarida, Nektaspida and Trilobita Acanthomeridion serratum Alalcomenaeus Almenia spinosa Apiocephalus...
elevated out of the asaphid superfamily Trinucleioidea. Sometimes the Nektaspida are considered trilobites, but these lack a calcified exoskeleton and...
Anti-Atlas, Morocco, and Saint-Chinian Formation in Montagne Noire, France. Nektaspida have become less diverse after Cambrian. They most likely inhabited restricted...
Recently however, Paterson et al. propose to remove Buenaspis from the order Nektaspida entirely, on the argument that it lacks the 'waist' that is a common feature...
Panlongia cannot yet with confidence be assigned to the Helmetiida or the Nektaspida, as was initially suggested. Panlongia tetranodusa occurs with the coeloscleritophoran...
Stuart (2004). "A new Late Silurian (Pridolian) naraoiid (Euarthropoda: Nektaspida) from the Bertie Formation of southern Ontario, Canada—delayed fallout...
classification Domain: Eukaryota Kingdom: Animalia Phylum: Arthropoda Order: †Nektaspida Family: †Liwiidae Genus: †Liwia Dzik and Lendzion, 1988 Species See text...
Rudkin and S. Milliken. A new Silurian (Pridolian) naraoiid (Euarthropoda: Nektaspida) from the Bertie Formation of Southern Ontario, Canada - Delayed fallout...
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