There is a passage that discusses the concept a bit.
Henry Farfield Osborn was the director and president of the American
Museum of Natural History during the earlier part of this century.
He was a powerful figure in paleontology. It continues:
On the other hand, some of Osborn's diffuculties with prevailing
evolutionary thinking in the 1920's were based on a
dissatisfaction with natural selection as a blanket explanation
for absolutely everything that has happened in evolution.
And some of Osborn's problems derived from an even more
common and vexatious source: basic misunderstandings between two
disciplines. Both genetics and paleontology obviously bear on
evolution, but otherwise there are no two more dissimilar
activiteis than the finding, collecting and analysis of fossil
bones and shells on the one hand, and figuring out the physical
and chemical basis of heredity on the other. To this day the
very elements of each discipline remain a closed book to the
majority of practitioners of the other.
Theodosius Dobzhansky, a geneticist and the closest
thing to the "founding father" of the "synthetic theory of
evolution," persistently criticized (derided is actually more
like it) Osborn for writing:"Speciation is a normal and
continuous process; it governs the greater part of the origin of
species; it is apparently always adaptive. Mutation is an
abnormal and irregular mode of origin, which while not
infrequenly occuring in nature is not essentially an adaptive
process; it is rather a disturbance of the regular course of
speciation." It took another paleontologist, George Gaylord
Simpson, to point outthat Osborn was simply using the word
"mutation" in its *original* sense. The word first entered the
paloentological literature in a paper by W. Waagen on ammonite
evolution-a paper written in 1868. Waagen was discussing a
series of ammonites (extinct moluscan relatives of the modern
pearly nautilus) that he felt formed a linear
ancestral-descendant lineage. Successive geological strata
yielded slightly different forms, and these Waagen called
"mutations." To "mutate" is simply to "change." "Mutation"
simply popped up again as the natural choice of a word to
describe spontaneous modifications in some anatomical feature of
an individual organism-thus, presumably, a change in the
underlying genetic material- when geneticists started plumbing
the depths of heredity in the early 1900's.
end quote
The book was written to address the observation:
For the paradox is this:
species do not exhibit the sort of directional change
through thier long histories, the sort of pattern that
has been considered the true stuff of all evolutionary
change. Yet species very commonly are members of
lineages-trilobites, hominids, horses, dinosaurs-in
which such directional change between species is a
commonplace.
Gould an I claimed that stasis-nonchange-is the dominant
evolutionary theme in the fossil record. It is characteristic
of most species that have ever lived. Adaptive change is
relatively rare, and usually associated with speciation, thus
typically rather rapid. Once a species appears, if it is
successful at all, the fossil record shows that it will tend to
hang on unchanged for vast stretches of time. And this, we saw,
destroyed the backbone of the major argument of the modern
"synthetic theory" of evolution-the argument maintaining that
absolutely all the features of the history of life could be seen
as constantly ongoing adjustments to ever-changing environmental
conditions. (p.128)
end quote
Eldridge and Gould, 1985.
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