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Rear ventral view of a semi-fully engorged female tick of R. sanguineus s. l. Observe the inverted U-shaped anal groove, the spiracles below the fourth pair of legs and stigmata in coxa IV. Festoons on the back side of the specimen can be seen. (a,b) Photography obtained with an Axio Zoom V6 microscope. (c) Photography obtained with a laser scanning confocal 700 (LSM 700).
