Complex sentence: Gilbert designated the Nice specimen as the lectotype that would define "S. tudes", having priority over the Cayenne specimen (the paralectotype), which was meant to stabilize the name but turned out to have the opposite effect.
Split into simpler sentences: Gilbert designated the Nice specimen as the lectotype that would define "S. tudes", having priority over the Cayenne specimen (the paralectotype). This was meant to stabilize the name but turned out to have the opposite effect.