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From Warhammer 40k - Lexicanum
Added info about Genesis Chapter being first primogenitor
These Chapters have stayed close-knit, often fighting alongside each other and always standing ready to answer any call from the [[Chapter Master]] of the Ultramarines.{{Fn|1a}}
Of the primogenitors, the [[Genesis Chapter]] is known to be the first ever Ultramarines successor Chapter founded.{{Fn|4}}
==Known Primogenitor Chapters==
* {{Endn|2}}: [[Chapter Approved 2001]], pg. 117
* {{Endn|3}}: [[Deathwatch: Rites of Battle]], pgs. 55-58
* {{Endn|4}}: [[Codex: Space Marines (8th Edition)]], pg. 30
[[Category:Later Foundings]]
