Mellopegma (Mollusca) from the Middle Cambrian of North Greenland

During the last decade, the resurgence of interest in the non-trilobite faunas of the Cambrian has resulted in the description of many new taxa of problematic molluscs. One such form is the laterally compressed helcionellacean Mellopegma, originally described from the Middle Cambrian of Australia by Runnegar & Jell (1976) but subsequently reported from the Lower Cambrian of China (Zhou & Xiao, 1984). Mellopegma has now been identified from the Middle Cambrian of central North Greenland where it occurs as phosphatised internal mouids preserved in a manner similar to that of the original Australian specimens from the Currant Bush Limestone of Queensland.