You must have responded without reading my post (or the article you quoted for that matter).

Let me give you the conclusion that talks about the sequence with respect to hips and legs and the movement of whales from land to sea.
"Together these pelvises form an excellent transitional series, in which ambulocetids and remintonocetids retain all elements of land mammals, and protocetids lose the fused sacrum (Rodhocetus) and the iliosacral joints (Georgiacetus) and have some short femurs (in known forms). Basilosaurids and dorundontids have greatly reduced hind limbs and reduced ilia, while still retaining the acetabulum and foramen of the innominates. Only vestiges of these structures are present in modern whales."

‘Whale Origins as a Poster Child for Macroevolution’ J.G. M Thewissen and Sunil Bajpai, December 2oo1 / Vol. 51 No. 12, BioScience (1043)"

Pakicetus is the first terrestrial whale. Ambulocetus, Rodhocetus, Georgiacetus, and Basilosaurus all show increasing adaptations to life at sea. It is clear that they are related and that each member of the series fits into appropriate time and environmental sequence.

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