Although other forms of disfixation exist, the element subtracted is usually the final segment of the stem.
Other terms for the same or similar processes are subtraction, truncation, deletion, and minus formation.
[1] In Muskogean, disfixes mark pluractionality (repeated action, plural subjects or objects, or greater duration of a verb).
The modern situation results from regular apocope which removed a consonant from the masculine and the final schwa of the feminine.
In Portuguese, some words which have the masculine ending -ão have a feminine equivalent -ã, synchronically analyzable as a disfixation.