'distinct branch' is a correct and usable phrase in written English.
You can use it when referring to a section of something that is separate from the rest. For example, "The company has a distinct branch that focuses on smart home technology."
By 1900, set theory was recognized as a distinct branch of mathematics.
Albanian is the only modern representative of a distinct branch of the Indo-European language family.
Armenians constitute nearly all of the country's population; they speak Armenian, a distinct branch of the Indo-European language family.
More recent data on these hitherto poorly known languages suggest that they form a distinct branch of the Mon-Khmer family, itself a part of the Austroasiatic stock.
Most of the people are animists of Malay ancestry and speak dialects of a distinct branch of the Austronesian (Malayo-Polynesian) language family.
In response to these obstacles, the PPP split, registering a new, legally distinct branch called the Pakistan People's Party Parliamentarians PPPPParty Parliamentarians PPPP
She is understandably disappointed that mathematical biology has failed to become a distinct branch of the biological sciences and feels that biologists do not accept that mathematical explanations are the heart of true science.
Dutch emerged as a structurally distinct branch of West Germanic as the result of language contact between speakers of North Sea Germanic and speakers of the South Germanic "Franconian," or Frankish.
P. mongolicus collected from Menofia Governorate formed a distinct branch with 99% support.
Phylogenetic analyses using these sequences showed that the NYJ strain forms a distinct branch with high bootstrap support.
Although they lived at the same time, pterosaurs are not dinosaurs; they form a distinct branch of the evolutionary tree.
