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.
- Received August 1, 1993.
- Accepted May 1, 1994.
- © 1995 The Micropalaeontological Society