Naraoiidae

Naraoiidae Temporal range: 526–416 Ma PreꞒ Ꞓ O S D C P T J K Pg N Late Atdabanian-Pridoli
Naraoia spinosa
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Order:	†Nektaspida
Family:	†Naraoiidae Walcott, 1912
Genera
Misszhouia Naraoia ?Pseudonaraoia[1]

Naraoiidae is a family, of extinct, soft-shelled trilobite-like arthropods, that belongs to the order Nektaspida. Species included in the Naraoiidae are known from the second half of the Lower Cambrian to the end of the Upper Silurian. The total number of collection sites is limited and distributed over a vast period of time: Maotianshan Shale and Balang Formation (China), Burgess Shale and Bertie Formation (Canada), the Šárka Formation (Czech Republic),^[1] Emu Bay Shale (Australia), Idaho and Utah (USA). This is probably due to the rare occurrence of the right circumstances for soft tissue preservation, needed for these non-calcified exoskeletons.