Micragnostus orientalis

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Agnostidae

micr-, Greek, small; Agnostus, a trilobite genus name.

orientalis, Latin, eastern, referring to its Chinese origin.

Geragnostus (Micragnostus) orientalis

Dorsal shield elongate-oval. Cephalon subsquare; glabella convex, subcylindrical, occupying about two-thirds of the cephalic length; glabellar frontal lobe elongate, occupying about one-third of the glabellar length; posterior segment more strongly convex, middle part with elongate median node, with a pair of short, weak glabellar lateral furrows in front of the median node; dorsal furrow deep and narrow; basal lobe triangular, relatively large; cheek relatively broad; border furrow narrow and deep; border narrow and convex raised, of uniform width. Thoracic axis broad; pleural lobes narrow, pleural furrow narrow and deep, pleural spines short and extending obliquely forward. Pygidium nearly round; pygidial axis convex, occupying about three-quarters of the pygidial length; divided into three rings, the first axial ring composed of nearly square lateral lobes; second axial ring with stout axial node; posterior axial ring large, exceeding half the length of the pygidial axis; pleural lobes relatively narrow; border furrow narrow and deep; border narrow and convex, Uniform width; With a pair of tiny posterolateral spines.

Typical body length about 0.2-1.2 cm.