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What features distinguish male and female thrips?
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thrips
Western flower thrips (Frankliniella occidentalis).
In the order Thysanoptera, male and female thrips exhibit distinct morphological differences, particularly regarding their abdominal structure and reproductive organs.1
- Abdominal Terminal Segment: In the suborder Terebrantia, the terminal abdominal segment is rounded in males, whereas in females, it is split ventrally up to the eighth segment.1
- Reproductive Organs: Females of the Terebrantia possess an ovipositor composed of two pairs of sawlike blades used for inserting eggs into plant tissue. This structure is absent in the suborder Tubulifera. Conversely, males possess paired genital appendages and an unpaired copulatory organ (aedeagus) that retract into the abdomen.12
- General Characteristics: While males and females share the same basic body plan, males are frequently shorter-lived than females. Additionally, because of their minute size, thrips are often elaborately ornamented with spines or body flanges, though these features are generally characteristic of the species rather than specific to one sex.23