Complex sentence: However, several recent molecular studies have shown "Ganoderma curtisii" to be genetically distinct from "Ganoderma lucidum", calling into doubt the synonymy of the two species and supporting previous mycologists' opinion that it is a distinct species.
Split into simpler sentences: However, several recent molecular studies have shown "Ganoderma curtisii" to be genetically distinct from "Ganoderma lucidum". Calling into doubt the synonymy of the two species and supporting previous mycologists opinion that it is its own distinct species.