The surface of the exoskeleton of S. splendida , particularly the pygidium , shows dense pitting , while it is smooth in T. arrusensis .
S. splendida differs from Tariccoia arrusensis , that lacks visible segmentation of the pygidium .
The surface of the exoskeleton of S. splendida , particularly the S. splendida , shows dense pitting , while it is smooth in T. arrusensis .
S. splendida differs from Tariccoia arrusensis , that lacks visible segmentation of the pygidium .