Author	Biffi, U. and Manum, S.B.
Year	1988
Journal	Geol. Soc. Denmark, Bull. vol.21 pp.346-357 pl.3
Title	Late Eocene-Early Miocene dinoflagellate cyst stratigraphy from the Marche Region (Central Italy). Boll. Soc. Paleont. Ital. 27 (2): 163-212. Modena

Abstract Biffi, U. and Manum, S.B., 1988; Late Eocene-Early Miocene dinoflagellate cyst stratigraphy from the Marche Region (Central Italy). Boll. Soc. Paleont. Ital. 27 (2): 163-212. Modena. Abstract The dinoflagellate cyst stratigraphy of four sections across the Paleogene- Neogene boundary in the Marche Region, Central Italy, is described. These stratigraphic boundary sections have previously been studied intensively with regard to planktonic foraminifera and nannoplankton, however, with somewhat equivocal results regarding boundary definitions. Seven dinoflagellate zones and six sub-zones spanning the Late Eocene-Early Miocene have been defined and calibrated to Standard Nannoplankton Zones NP19 through NN4. This zonation helps to clarify some boundary ambiguities left by the other microfossil studies. The following new species of dinoflagellate cysts are described: Caligodinium pychnum, Hystrichokolpoma pusilla, H. truncata, Membranilarnacia (?) picena, Stoveracysta conerae, Systematophora urbinii, Cerebrocysta mediterranea, Impagidinium tectum, I. minor, I. eugubinum, Leptodinium italicum, Pyxidinopsis elliptica. Based on a detailed study of Caligodinium pychnum n. sp. a new interpretation for the epicystal paratabulation and apical archeopyle in Caligodinium Drugg and its type species C. amiculum is presented.