OS X El Capitan: ABC Extended Keyboard Capabilities

Apple’s ABC Extended input source (formerly called : "US Extended") lets you type a vast number of accented and special latin characters. A common standard reference for its codes is at

http://symbolcodes.tlt.psu.edu/accents/codemacext.html

Unfortunately that reference is missing the following deadkey shortcuts which have been added at some point in recent years:

+Option-Shift period: Characters with hooks: Ɓ ɓ Ɗ ɗ Ɲ ɲ ñ Ƴƴ

+Option-Shift semicolon: A variety of phonetic symbols like ə ŋ ɣ ȝ

+Option-Shift g: Characters with circumflex below.

+Option-Shift f: Characters with tilde below.