Anisomerous

The Elephants with hypisomerous-ridged molars are divisible into the two natural groups, Stegodon and Loxodon; the anisomerous species form a third natural group, for which, as already explained, the term Euelephas is proposed.

Source: wiktionary

As an example, in the members of the sub-genus Euelephas, and notably the Elephas primigenius and Elephas Asiaticus, the ciphers of whose molars, he states, are precisely alike in number, he formulates their ridges in upper and lower teeth thus:—4+8+12::12+16+24, showing that, with the exception of the first and ultimate true molars, the others increase by increments of 4, or, as he terms it, by an "anisomeroous mode of progression."

Source: wiktionary

A plant with four petals and six stamens is anisomerous.

Source: wiktionary

Tamarix flowers are anisomerous ( a flower having an unequal number of petals, stamens , or other floral parts). It is possible to find in one raceme anisomerous flowers with different numbers of sepals, petals, stamens, and so on, without any numerical correlation between the organs.

Source: wiktionary