Source: p 94, An Introduction to Language (10 ed, 2014) by V Fromkin, R Rodman, N Hyams
The information about the complement types selected by particular verbs and other lexical items is called C-selection or subcategorization, and is in cluded in the lexical entries of the items in our mental lexicons. (C stands for "categorial.")
I am curious why subcategorization (with its prefix 'sub-') was selected, while C-selection uses only the stem "categorial" in referring to Grammatical/Syntactic Categories (not Subcategories).
The OED does not disambiguate.