IPA: /sʌbˈtæksɒn/
KK: /sʌbˈtæksɒn/
A category that is part of a larger group in biological classification.
The scientist discovered a new subtaxon within the existing species.
Subtaxon → It is formed from "sub-" (meaning under or below) and "taxon" (from Greek "taxis", meaning arrangement or order). The word "subtaxon" refers to a taxonomic category that is subordinate to a higher taxon, indicating a classification that is below another in hierarchy.
Think of something that is 'under' ('sub-') a larger 'arrangement' ('taxon') in classification — that's what subtaxon means.