The bone on the left in the photo above is the right humerus we removed at Carmel Church a few days ago. While we were excavating I remarked to the other diggers that the bone seemed unusually large, especially when compared to the vertebrae associated with it. The bone on the right is the left humerus of Eobalaenoptera harrisoni, the largest whale known from Carmel Church. As you can see, the humerus in Eobalaenoptera is only a little larger than the new specimen (in fact, it’s only about 16% longer).
The vertebrae give a different story. Here is one of the vertebrae we removed (top), and the 20th vertebra from Eobalaenoptera (bottom), which is approximately the same position:
The Eobalaenoptera vertebrae is substantially larger; it’s 30% taller than in the new whale. I’m not sure what taxon the new whale is, but its body proportions seem to be substantially different from Eobalaenoptera, with much larger flippers relative to its body size.
This also shows the potential for useful information in postcranial material, as Doug and I were discussing in the comments last week.