Complex sentence: The "hominivorax" larvae are responsible for "Cochliomyia's" common name, the screwworm, due to the fact that they possess small spines on each body segment that resemble a screw's threads.
Split into simpler sentences: The "hominivorax" larvae are responsible for "Cochliomyia's" common name, the screwworm. The larvae possess small spines on each segment which can resemble a screw's threads.