Dichagnostus Pleuroctenium[2] is an agnostid trilobite belonging to the family Condylopygidae Raymond (1913).

[3] The genus occurs in Middle Cambrian (Drumian) strata of Canada (Newfoundland and New Brunswick), the Czech Republic, England and Wales, France, and Sweden.

By subsequent designation by Vogdes (1925) [4] Battus granulatus Barrande, 1846, p. 15.,[5] from the Middle Cambrian of Bohemia.

Lectotype: By subsequent designation by Snajdr (1958),[6] National Museum of Prague, coll.

), Eccaparadoxides pusillus Zone, Týřovice, Bohemia.