Taxonomy

Phylum: Arthropoda

Class: Vicissicaudata

Order: Aglaspidida

Family: uncertain

Genus: Glypharthrus

Specie: trispinicaudatus

Description:

The cephalon is semi-circular in outline. Posterior margin gently curves forwards abaxially, where it intersects with the lateral margins to form acute genal angles. Wide, shallow, sigmoidal posterior furrows run from the posterior margin of the glabellar region towards the lateral cephalic margins without reaching them, thus delimiting posterior borders that widen abaxially. The sessile dorsal eyes are narrow, elongate  and kidney-shaped. They are rather high posteriorly, but extend anteromedially as robust ‘eye ridges’. The outline of a glabellar region is obvious, but not actual furrows.

The trunk region comprises twelve tergites that are articulated. It bears a thin ridge that runs subparallel to its entire anterior margin, and separates an articulating platform anteriorly.

Three elongate structures project from its posterior margin – they are straight, unsegmented, and narrow distally. Apparently none of them are complete distally, but one is slightly larger and three times longer than the other two. These other two spiniform structures have similar widths and lengths, and therefore likely represent a pair. These three structures are regarded as a telson and paired rami

Age & Localities

Age: Cambrian Furongian

Principal localities: Jingxi County, western Guangxi Zhuang Autonomous Region, South China