Calymenesun granulosa

Order Phacopida / Suborder Calymenina / Superfamily Calymenoidea / Family Calymenidae

Calymene, a trilobite genus name; Sun, a surname, in honour of Prof. Sun Yunchu, the renowned Chinese

granulosa, Latin, granular, referring to the tubercles of varying size on the shell surface

Compared with the type species Calymenesun tingi, the differences are: the cranidium is densely covered with nodes of varying size, the anterior branches of the facial sutures converge less strongly forward from the eyes, and the thoracic axis is narrower.