Make Custom Taxonomy Category Use Parent Template
Hook into template_include filter add_filter(‘template_include’, ‘research_term_template’); function research_term_template( $template ) { if ( is_tax(‘classifications’) ) { $parent = get_term_by(‘slug’, ‘oldresearch’, ‘classifications’); // to improve performance you can hardcoding ‘oldresearch’ term id // $parent = 12; if ( term_is_ancestor_of( $parent, get_queried_object(), ‘classifications’ ) ) return get_template_directory() . ‘/taxonomy-Classifications-oldresearch.php’; } return $template; }