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Tariccoia is a genus of small to average size (between and long) marine arthropods in the Liwiidae Family, that lived during the late Ordovician period. Fossil remains of Tariccoia were collected from Sardinia, Italy. Tariccoia looks like a large, soft agnostid trilobite. It has a headshield (or cephalon) wider than the tailshield ( pygidium), and in between them three (or four?) thoracic body segments ( somites). The genus is monotypic, its sole species being Tariccoia arrusensis.