Question

The structure that is present in the 9^th abdominal segment of cockroach is?

• A. anal styles in male.
• B. anal cerci in female.
• C. anal style and antennae in female.
• D. Both (A) and (C)

Answer 1

Answer: (A)

In cockroach males, the genital pouch or chamber lies at the hind end of the abdomen bounded dorsally by the 9^th and 10^th terga and ventrally by the 9^th sternum. It contains a dorsal anus, ventral male genital pore, and gonapophysis. Males bear a pair of short, threadlike anal styles in the 9^th abdominal segment which are absent in females. In both sexes, the 10^th segment bears a pair of jointed filamentous structures called anal cerci.