Keidelaspis Angelina Salter, 1859, [1] is a genus of ptychopariid trilobite belonging to the Family Olenidae, Suborder olenina.

It differs from most other Triarthrinae in being larger, with a relatively narrow glabella, the occipital ring poorly defined, and lateral glabellar furrows relatively obscure.

Eyes are placed midlength that of the cephalon and the facial sutures converge on the front border at the midline.

This is the classic trilobite species found at Y Garth Hill, near Porthmadog, North West Wales (grid reference SH 598 394), and which has been collected for well over 100 years.

Fossils of Angelina have been found in Argentina, Bolivia, Mexico, [5] North West Wales and Shropshire, England.