Ellipsocephalus

Ellipsocephalus is an extinct genus of blind trilobite that lived during the Cambrian. The genus comprises benthic species inhabiting deep, poorly lit or aphotic habitats.[1] E. hoffi is a common trilobite mainly from central Europe (Czech Republic).

Etymology
Ellipsocephalus is the contraction of ellipse (from Greek ἔλλειψις elleipsis, "falling short") and cephalus (Greek: Κέφαλος Kephalos, "head") for the rounded headshield that is wider than long.

Distribution

 * E. hoffi occurs in the Middle Cambrian of the Czech Republic (Jince Formation).[3]
 * E. polytomus has been found near Viken, Näkten lake, Jämtland, Sweden.[4]
 * E. sanctacrucensis is known from the Middle Cambrian of Poland (Słowiec Sandstone Formation, Paradoxides insularis and P. pinus-zones, near Brzechów, Holy Cross Mountains).