Abstract
Pellatispira Boussac, known to be restricted to Upper Eocene shallow marine sediments of the Tethyan and Indo-Pacific provinces, has been recovered together with Assilina papillata Nuttall, Assilina cancellata Nuttall, Nummulites atacicus Leymerie and Orbulinoides beckmanni (Saito) in a thin marl bed in the Amravati River section near Bharuch, Western India. The assemblage occurs in the Globigerapsis beckmanni Zone of Middle Eocene age. Represented by Pellatispira crassicolumnata Umbgrove, P. orbitoidea (Provale), P. aff. madaraszi (Hantken) and P. boussaci sp. nov., the genus of the Middle Eocene is distinct with its primitive state of some characters, including the presence of discontinuous longitudinal canals in the outer whorl wall, irregular growth of radial canals in the marginal crest and low trochospiral coiling. Externally it possesses heavy ornamentation like its Late Eocene descendants. The wall structure and the general structure of the tests of this primitive Pellatispira permit its inclusion within the Pellatispiridae.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
