Wiktionary
n. An unsuitable or incorrect mate between organisms. vb. (present participle of mismate English)
Usage examples of "mismating".
He let the soap remain in the water to soften a little, and, returning to the dressing room, whiled away the time in mixing and mismating pairs of shoes along the walls, and also in tying the strings of the mismated shoes together in hard knots.
The three dread Sisters who determine the fate of men must have laughed amongst themselves at such an obvious mismating, knowing well how inevitably it would tangle the threads of many other lives than the two immediately concerned.
Social condemnation should stigmatize the wrong of mismating, not the undoing of such a wrong.
Was I not a troll after all, the get of some foul mismating, or maggotlike engendered in dank turd under a bridge?