caa a22 4500 388017104 CHVBK 20180307124914.0 cr unu---uuuuu 161130e199809 xx s 000 0 eng 10.1017/S0022336000027232 doi S0022336000027232 pii (NATIONALLICENCE)cambridge-10.1017/S0022336000027232 A new middle Eocene protocetid whale (Mammalia: Cetacea: Archaeoceti) and associated biota from Georgia [Elektronische Daten] [Richard C. Hulbert, Richard M. Petkewich, Gale A. Bishop, David Bukry, David P. Aleshire] A shallow-marine fossil biota was recovered from the Blue Bluff unit (formerly part of the McBean Formation) in the Upper Coastal Plain of eastern Georgia. Biochronologically significant mollusks (e.g., Turritella nasuta, Cubitostrea sellaeformis, Pteropsella lapidosa) and calcareous nannoplankton (e.g., Chiasmolithus solitus, Reticulofenestra umbilica, Cribocentrum reticulatum) indicate a latest Lutetian-earliest Bartonian age, or about 40 to 41 Ma. Georgiacetus vogtlensis new genus and species is described from a well-preserved, partial skeleton. Georgiacetus is the oldest known whale with a true pterygoid sinus fossa in its basicranium and a pelvis that did not articulate directly with the sacral vertebrae, two features whose acquisitions were important steps toward adaptation to a fully marine existence. The posterior four cheek teeth of G. vogtlensis form a series of carnassial-like shearing blades. These teeth also bear small, blunt accessory cusps, which are regarded as being homologous with the larger, sharper accessory cusps of basilosaurid cheek teeth. Copyright © The Paleontological Society Hulbert Richard C. Department of Geology and Geography, Georgia Southern University, Statesboro 30460-8149 <rhulbert@gsaix2.cc.gasou.edu> aut Petkewich Richard M. Department of Geology and Geography, Georgia Southern University, Statesboro 30460-8149 <rhulbert@gsaix2.cc.gasou.edu> aut Bishop Gale A. Department of Geology and Geography, Georgia Southern University, Statesboro 30460-8149 <rhulbert@gsaix2.cc.gasou.edu> aut Bukry David United States Geological Survey, MS-915, 345 Middlefield Road, Menlo Park, California 94025 aut Aleshire David P. Department of Biology, Georgia Southern University, Statesboro 30460-8042 aut Journal of Paleontology Cambridge University Press 72/5(1998-09), 907-927 0022-3360 72:5<907 1998 72 JPA https://doi.org/10.1017/S0022336000027232 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022336000027232 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hulbert Richard C. Department of Geology and Geography, Georgia Southern University, Statesboro 30460-8149 <rhulbert@gsaix2.cc.gasou.edu> aut NATIONALLICENCE 700 1- Petkewich Richard M. Department of Geology and Geography, Georgia Southern University, Statesboro 30460-8149 <rhulbert@gsaix2.cc.gasou.edu> aut NATIONALLICENCE 700 1- Bishop Gale A. Department of Geology and Geography, Georgia Southern University, Statesboro 30460-8149 <rhulbert@gsaix2.cc.gasou.edu> aut NATIONALLICENCE 700 1- Bukry David United States Geological Survey, MS-915, 345 Middlefield Road, Menlo Park, California 94025 aut NATIONALLICENCE 700 1- Aleshire David P. Department of Biology, Georgia Southern University, Statesboro 30460-8042 aut NATIONALLICENCE 773 0- Journal of Paleontology Cambridge University Press 72/5(1998-09), 907-927 0022-3360 72:5<907 1998 72 JPA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge