A student observes a cockroach specimen and notes that its 7th sternum is boat-shaped and, together with the 8th and 9th sterna, forms a brood or genital pouch. Which of the following structures will be absent in this specimen?

Step-by-step solution

The presence of a boat-shaped 7th sternum that forms a genital pouch along with the 8th and 9th sterna is a characteristic feature of a female cockroach. Female cockroaches possess anal cerci, collateral glands, and spermathecal pores as part of their anatomy. However, they lack anal styles, which are short, thread-like structures found exclusively in male cockroaches. Answer: Anal styles