The term "Mormon fundamentalist" appears to have been coined in the 1940s by LDS Church apostle Mark E. Petersen[REF] to refer to groups who had left the LDS Church.
In rebuttal to this nomenclature argument, certain Mormon fundamentalists have argued that they themselves are in fact more correctly designated as Mormons in so far as they follow what they consider to be the true and original Mormon teachings as handed down from Joseph Smith and Brigham Young.