Figures 2.6


The four basic types of cuticular protuberances: (a) a multicellular spine; (b) a seta, or trichoid sensillum; (c) acanthae; and (d) microtrichia.
Figures 2.6. The four basic types of cuticular protuberances: (a) a multicellular spine; (b) a seta, or trichoid sensillum; (c) acanthae; and (d) microtrichia.

(After Richards & Richards 1979)

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  The cuticular pores and ducts on the venter of an adult female of the citrus mealybug, Planococcus citri (Hemiptera: Pseudococcidae).
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  Types of body segmentation.