A male cockroach can be identified by the presence of anal styles, which are short, thread-like, unjointed structures found at the hind end of the abdomen, while these are absent in female cockroaches. Both male and female cockroaches also possess anal cerci, which are jointed structures, but the anal styles are a unique feature of the male.
The male cockroach can be identified from the female by the presence of ______?
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