R.M. Petkewich
G.A. Bishop
D. Bukry
D.P. Aleshire
R.C. Hulbert Jr.
1998
<div class="abstract-content"><div class="abstract" data-abstract-type="normal"><p>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.,<span> </span><span class="italic">Turritella nasuta, Cubitostrea sellaeformis, Pteropsella lapidosa</span>) and calcareous nannoplankton (e.g.,<span> </span><span class="italic">Chiasmolithus solitus, Reticulofenestra umbilica, Cribocentrum reticulatum</span>) indicate a latest Lutetian-earliest Bartonian age, or about 40 to 41 Ma.<span> </span><span class="italic">Georgiacetus vogtlensis</span><span> </span>new genus and species is described from a well-preserved, partial skeleton.<span> </span><span class="italic">Georgiacetus</span><span> </span>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<span> </span><span class="italic">G. vogtlensis</span><span> </span>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.</p></div></div>
application/pdf
10.1017/S0022336000027232
en
Oxford Academic
A new middle eocene whale (Mammalia: Cetacea: Archaeoceti) and associated biota from Georgia
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