Mixed Origin

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Mixed origin refers to a system that has multiple different system origins. This could be because their system formed from a combination of factors, or that not all of their headmates are of the same origin.

Related Terms
Mixed origin systems can be a combination of unknown, adaptive, spontaneous, or created. It can also be used like praesigenic, denoting a system with complex or hard to define origins.

If a system has one primary origin but ultimately multiple causes among headmates, the term isoscegenic may apply. There's also much overlap with polygenic and pangenic.