Netrelytron "jurassicum" (Alberti, 1961, p.21, pl.7, fig.8) Sarjeant, 1966c, p.201. Holotype: Alberti, 1961, pl.7, fig.8. Combination not validly published: basionym not fully referenced. Originally Kalyptea, subsequently Netrelytron (combination not validly published). Taxonomic senior synonym: Kalyptea (as Pareodinia) diceras, according to Below (1990 [October], p.65). Taxonomic senior synonym: Netrelytron (as Kalyptea, now Pareodinia) stegasta, according to Wiggins (1975, p.110) and Kunz (1990 [January], p.12) — however, Below (1990 [October], p.65) considered Kalyptea jurassica to be a taxonomic junior synonym of Kalyptea (as Pareodinia) diceras. Gocht (1970b, p.154) considered Pareodinia ceratophora to be the questionable taxonomic senior synonym of this species. Age: Bathonian–Callovian.