How many dungeons/boss fights are mandatory for storyline?

[Enkidoh]

From what I remember, not including solo-instanced battles:

Dungeons:

Sastasha Seagrot
Tam Tara Deepcroft
Copperbell Mines
Thousand Maws of Toto Rak
Haukke Manor
Brayflox's Longstop
Stone Vigil
Castrum Meridiaum
The Praetorium

Party Boss fights (ala, 'trials' in the Duty Finder)
Bowl of Embers (Ifrit)
The Navel (Titan)
The Howling Eye (Garuda)
Cape Westwind (Rhitalyn sas Arvina)

I haven't included optional dungeons, dungeons required for Grand Company promotion, dungeons needed for the 2.1/'Chronicles of a New Era' story (which is all set after the 'main' storyline), or solo story boss fights like storming Castrum Centri, as there's probably too many to list here. Nor have I included the series of boss fights in the Praetorium as the 'final' battles for the game. But these are the party dungeon/boss fights I can remember.

EDIT: forgot Brayflox's (not surprising - I'm sure most of us would rather forget that hellhole even exists. ).