Ellipsocephalus hoffi is a common trilobite mainly from central Europe.
The slab shows several Ellipsocephalus remnants.
Taxonomy according to Fossilworks.org.
The systematic position of the family Ellipsocephalidae remains a subject of discussion.
Odontogenetic stages of Ellipsocephalus hoffi according to Laibl et al. 2015, p. 5:
Identified by oilshale using Laibl et al., 2015.
References:
SCHLOTHEIM, E.F. (1823): Nachträge zur Petrefactenkunde. Zw. Abteilung, Becker, Gotha, 114 pp.
FATKA, O. & SZABAD, M. (2014): Biostratigraphy of Cambrian in the Příbram-Jince Basin (Barrandian area, Czech Republic). Bulletin of Geosciences, 88, 413–429. http://dx.doi.org/10.3140/bull.geosci.1456
LAIBL, L., FATKA, O., BUDIL, P., AHLBERG, P., SZABAD, M., VOKÁČ, V. & KOZÁK, V. (2015): The ontogeny of Ellipsocephalus (Trilobita) and systematic position of Ellipsocephalidae. Alcheringa 39, p. 1-11. DOI: 10.1080/03115518.2015.1034968