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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/6360
Title: A new middle eocene sirenian (mammalia, protosirenidae) from india
Authors: Bajpai S.
Domning D.P.
Das D.P.
Mishra V.P.
Published in: Neues Jahrbuch fur Geologie und Palaontologie - Abhandlungen
Abstract: Ashokia antiqua is a new genus and species of protosirenid sirenian based on a subadult skull from the early middle Eocene (Lutetian) Harudi Formation of Kutch district, Gujarat State, western India. While more derived than prorastomids, and more primitive than trichechids or dugongids, in comparison with other protosirenids it displays a mosaic of primitive and derived character states that places it at the evolutionary grade of a relatively primitive protosirenid. Cladistically, its sister group may be an unnamed genus and species of protosirenid from the Lutetian of Libya, which shares with it several synapomorphies of the zygomatic arch and ear region. This relationship with the unpublished Libyan form reinforces a pattern in Eocene paleobiogeography previously noted by SAGNE (2001): generically-distinct and endemic sirenian faunas on the north and south shores, respectively, of the former Tethys Seaway. The Kutch sirenian fauna, with Eotheroides, Eosiren, Protosiren, and now a relative of the Libyan protosirenid, resembles the fauna from North Africa, while the European genera Halitherium, Prototherium, and Sirenavus are absent - as predicted by SAGNE'S (2001) hypothesis. © 2009 E. Schweizerbart'sche Verlagsbuchhandlung.
Citation: Neues Jahrbuch fur Geologie und Palaontologie - Abhandlungen (2009), 252(3): 257-267
URI: https://doi.org/10.1127/0077-7749/2009/0252-0257
http://repository.iitr.ac.in/handle/123456789/6360
Issue Date: 2009
Keywords: Eocene
India
Palaeobiogeography
Protosirenidae
Sirenia
Tethys
ISSN: 777749
Author Scopus IDs: 16214305000
6701547693
7402353210
7102563872
Author Affiliations: Bajpai, S., Department of Earth Sciences, Indian Institute of Technology, Roorkee 247667, India
Domning, D.P., Department of Anatomy, Howard University, Washington, DC 20059, United States
Das, D.P., Geological Survey of India, Palaeontology Division -I, Kolkata 700016, India
Mishra, V.P., Palaeontology Division, Geological Survey of India, Lucknow 226024, India
Corresponding Author: Bajpai, S.; Department of Earth Sciences, Indian Institute of Technology, Roorkee 247667, India; email: sunilfes@iitr.ernet.in
Appears in Collections:Journal Publications [ES]

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