Where does “microevolutional” come from?

microevolutional (English) comes from English evolutional, from English evolution, from Latin ēvolūtiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere, from Latin dis- — small stone, pebble; gravel, rubble.

Ancestry of “microevolutional”, step by step

microevolutional traces back through two separate lines of ancestry.

via English evolutional

StepLanguageWordMeaning
1EnglishevolutionalOf or pertaining to evolution, or coming about as...
2Englishevolution"A change of position."; "An unfolding.";...
3LatinēvolūtiōThe act of unrolling or opening a book; reading
4Latin-tiōtion, -ation, -ing
5Latindissertātiō(spoken) dissertation, discourse, disquisition
6Latindissertusarranged, disposed; explained
7Latindissereresecond-person singular future passive indicative...
8Latindis-asunder, apart, in two; reversal, removal;...
9Latincalceusshoe
10Latincalxlimestone; chalk; the finish line
11Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English micro

StepLanguageWordMeaning
1EnglishmicroSmall, relatively small; short form of...
2Ancient Greekμικρόςlittle, small
3Proto-Indo-Europeanmēy-soft, tender, dear
Every word from Ancient Greek χάλιξ