Select the incorrect match regarding the cockroach.

In male cockroaches, the male genital pore is surrounded by chitinous and asymmetrical structures called phallomeres. These structures are part of the male external genitalia and are involved in copulation. The phallomeres are typically described as ventral, left, and right phallomeres, referring to their positions relative to the male genital pore. They assist in the transfer of sperm to the female during mating.