Coronocephalus constrictus

Order Phacopida / Suborder Cheirurina / Superfamily Cheiruroidea / Family Encrinuridae / Subfamily Coronocephalinae

coron (Latin, crown) + cephal- (Greek, head), referring to the crown-like border of the librigenae

constrictus, Latin, constricted, referring to the strong posterior constriction of the glabella

Cranidium covered with nodes, rest of the body smooth. Glabella long, strongly constricted posteriorly, with 3 pairs of wide, deep, transglabellar furrows with deep pits at the ends, anterior lobe convex and semi-elliptical; dorsal furrows wide and deep; fixigenae narrow, posterior wings long, a pair of genal spines extending backward; librigenae oblique-triangular, border evenly studded with very small triangular projections; eyes elevated. Thorax rectangular, wider than long; 11 segments, segments 5 and 7 with long pleural spines. Pygidium large, triangular; axis with more than 30 rings, pleural segments 14-15; pygidial pleural spines well developed, border absent.