Error vacuo, detecting structures in poorly calcified Jurassic Dasycladales.

Document Type: Original paper (Research paper)


University of Naples Federico II, Department of Earth Sciences, Environment and Resources, Naples, Italy


Several Jurassic dasycladalean genera (e.g. Pseudoclypeina, Palaeodasycladus, Eodasycladus, Chinianella and Cylindroporella) display a complex structure which, owing to a deficit of calcification, is difficult to interpret. This lack of calcification causes a loss of certain soft algal structures and complicates the work of the specialist responsible for interpreting the algal anatomy as well as the corresponding position in the systematics. A key of interpretation is given, and case histories are discussed.