Delgadella
Delgadella is a diminutive agnostid that lived during the late Lower Cambrian and has been found in Russia, Mongolia, Spain, Italy, Portugal, Morocco and Canada. 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.
Description
The headshield is convex, and axial furrow that surrounds the central area almost obsolete, particularly on the external surface. The glabella has no transverse furrows. The border furrow is distinct and wide anteriorly, and the border distinct and narrow. The eye lobe is poorly defined. The free cheeks are long. The thorax has three segments. The tailshield has a long axis of 10 almost indiscernible rings. The furrow that defines the axis in the pygidium is almost obsolete. The area outside the rhachis is usually smooth, and like on the cephalon, the border and border furrow are very narrow but distinct.
Distribution
Delgadella occurs in the Lower Cambrian of the Russian Federation, and Spain.