Tariccoia arrusensis is between 2.5 and 6 cm along the axis, almost half a wide as long.
The dorsal exoskeleton consists of a cephalon, a pygidium and two or three thoracic somites with articulating half-rings, all non-calcified.
The cephalon is sub-semicircular, widest near the rounded genal angles.
The cephalon is wider than the pygidium.
Eyes are absent.
Antennas are not known.
The body is constricted at the two or three thoracic somites, so the animal gives the impression to have a waist.
The pygidium is widest before midlength.
The pygidium has a mid-ridge.
Tariccoia arrusensis is between 2.5 and 6 cm along the axis, almost half a wide as long. The dorsal exoskeleton consists of a cephalon, a pygidium and two or three thoracic somites with articulating half-rings, all non-calcified. The cephalon is sub-semicircular, widest near the rounded genal angles. The cephalon is wider than the pygidium. Eyes are absent. Antennas are not known. The body is constricted at the two or three thoracic somites, so the animal gives the impression to have a waist. The pygidium is widest before midlength. The pygidium has a mid-ridge.
Tariccoia