2008/10/16 by Steve Etches, Jane B. Clarke, J. H. Callomon · 1 citation
Earth and Planetary Sciences · #Paleontology and Stratigraphy of Fossils #Paleontology and Evolutionary Biology #Geology and Paleoclimatology Research
paper · doi:10.1111/j.1502-3931.2008.00133.x
openalex publication_date 2008/10/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
Eight clusters of small spherical and subspherical objects, some isolated and some associated with shells of perisphinctid ammonites, have been recovered from the Lower and Upper Kimmeridge Clay (Upper Jurassic) of the Dorset coast, England. They have been interpreted as ammonite egg sacs and represent the freshest and best-preserved examples known so far. Their structures and the ecological framework in which they occur are discussed. The parents are thought to be members of the two eudemic genera Aulacostephanus and Pectinatites that dominate the biostratigraphy of the ammonites in the range of the Kimmeridge Clay in which they occur. Isolated nuclei of ammonitellae have also been recovered.