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Duxbury (1983) database of Cretaceous dinoflagellate cysts

Susanne Feist-Burkhardt, Andrew S.Henderson and Iona McLachlan

Original images from Duxbury (1983)Duxbury (1983) is one of the most important publications for workers in Cretaceous dinoflagellate cysts. The collection, housed in the Micropalaeontology Division, consists of over 100 slides. The publication describes 102 taxa of which 2 genera and 20 species are described as new.

All of the important taxa have been re-imaged using modern digital photomicrography and are illustrated in this online database. In addition, and most importantly, many of the original specimens have been imaged using Confocal Laser Scanning Microscopy (CLSM) an innovative way for illustrating dinoflagellate cysts. CLSM can produce extended focus images but without the time-consuming preparation required for SEM images. This technique is also non-invasive so type collections can be re-imaged and re-illustrated to provide extra information for the palynologist. Three-dimensional images can also be constructed which can be viewed from different angles as animated movies.

New digital images of the original specimen

This database includes all the original plates from the publication and augments these substantially with new digital images, CLSM images and movies of the original specimens. The original diagnoses and emendations by Duxbury (1983) are included for each taxon with added notes inferring subsequent changes in taxonomy.

The database further extends the usefulness of this already important publication and by providing new colour digital images and CLSM images online allows all palynologists greater access to this collection while conserving the original specimens.

CLSM image of the original specimenDuxbury, S. 1983. A study of dinoflagellate cysts and acritarchs from the Lower Greensand (Aptian to Lower Albian) of the Isle of Wight, Southern England. Palaeontographica Abt. B, 186, 1-3, 18-80.