[AndrewC]

the morphology of the coelacanth, has not changed in some 380 million years

Yes it has.

Well then what are we to make from this comment in another portion of your cited source?

Coelacanths have not changed much over the past 380 million years. The skeleton of Macropoma lewesiensis, which is known from the upper Cretaceous, is virtually identical to that of the coelacanths caught off Sodwana Bay, Latimeria chalumnae, and differs little from the skeleton of most Devonian coelacanths.

[Stultis]

We are to take "virtually identical" to mean "similar," since as you can see for yourself the forms are similar but most definitely not identical.