Unusual twin specimens of Nannoconus abundans (Calcareous Nannofossil, Incertae Sedis)

Abstract

Abstract. Monospecific laminae of the species Nannoconus abundans (calcareous nannofossil, incertae sedis) were studied from the Munk Marl of North Jens-1, Danish Central Trough. These laminae contained unusual twin specimens which are considered to represent natural associations, rather than preservation artefacts.