Alemtejoia, Delgadodiscus, Delgadoia, Pagetiellus, Pentagonalia Delgadella is a diminutive trilobite that lived during the late Lower Cambrian (Atdabanian to Botomian, over 500 million years ago) and has been found in Russia (Siberian Platform, Altay Mountains), Mongolia, Spain, Italy (Sardinia), Portugal, Morocco and Canada (Newfoundland).

It can be recognized by its strongly effaced headshield and tailshield, with narrow but distinct furrows and borders along its margins, and three thorax segments.

[1] The headshield (or cephalon) is convex, and axial furrow that surrounds the central area (or glabella) almost obsolete, particularly on the external surface.

The tailshield (or pygidium) has a long axis of 10 almost indiscernible rings.

The furrow that defines the axis in the pygidium (or rhachis) is almost obsolete.