+A1b designates a foundational identifier, often marking an early branch within a broader [Classification](/wiki/Classification) scheme. It represents a distinct lineage, diverging from a [Common Ancestor](/wiki/Common_Ancestor) to establish unique characteristics.
+## See also
+- [Lineage](/wiki/Lineage)
+- [Identifier](/wiki/Identifier)
+- [Branch](/wiki/Branch)
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