[1] Similar to most of other hurdiid, Pahvantia had large dorsal head sclerite (H-element), and it was more than twice longer than wide.

[1] Based on frontal appendage, its morphology is most close to that of Hurdia, although shape of sclerites are enough different to consider Pahvantia as distinct genus.

[5] Lerosey-Aubril and Pates (2018) considered fossil specimen KUMIP 314819 as frontal appendage with a multitude of long hair-like structures tentatively interpreted as setae hereafter.

It was considered that whole morphology of "frontal appendage" shows several bands of lamellae and possibly represent disarticulated endites.

[5] Pahvantia was originally interpreted as one of the examples of suspension feeding radiodont alongside Aegirocassis and Tamisiocaris, used numerous setae on frontal appendage to capture microscopic food particles suspended in the water column.