metathesis methatesis (change in the sequence of sounds)These are of course wonderful for students — you can hardly forget these these concepts after you hear these.
haplology haplogy (loss of one of two identical syllables)
apocope apocop (loss of a final vowel)
syncope syncpe (loss of a medial vowel)
I knew this material first from the 1971 book Studies out in Left Field: Defamatory essays presented to James D. McCawley, ed. by Arnold Zwicky et al. It was originally published (as a joke festschrift for McCawley's "33rd or 34th birthday") by Linguistic Research, then reprinted by the good folks at John Benjamins in 1992. There, it's a "Glossary of Linguistic Terminology" by U. Pani Shad et alii and then "A Supplementary Glossary of Linguistic Terminology" by U Bal Shada Zwel et alii. It's rich in historical material (Krimm's Law, and for insiders Holtzmann's Laggus) and very multilingual.
Somehow I thought one or both of those had a title like "Auto-exemplification", but alas it's in the 1978 Lingua Pranca (available here, thanks to the Speculative Grammarian) where we find "The Linguist’s Self-Definer for Humanistic Greek and Latin Lingo—and other terms" by Robert Rankin, et al., followed immediately by "Autodescriptives" by Leonard Talmy. These are graphically much slicker, with IPA fonts and stuff, plus some nice ones like kpoarticulated stop, maybe more morphology (to back formate, pro clitic).
Other versions are here, here, and here and elsewhere. So, given that: how the heck has this stuff floated around without any crossreferences at all?