Hi Tony,
No there is no "list" of what views relate to what parts of your site but every file are grouped regarding their view (product/category), also if you want to know what your view's file is displaying you'll just have to add some text add the beginning of the file and see what this file really display.
Regarding your main product page, you'll have to edit the "show_default" file of the "product" view, and for the products that are displaying through the associated module of your category listing, you'll have to edit the listing_div/table/list (that will depend of how you have set the "Type of layout" option of the associated module of your category listing)