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Fig. 11 | BMC Zoology

Fig. 11

From: Life as a fortress – structure, function, and adaptive values of morphological and chemical defense in the oribatid mite Euphthiracarus reticulatus (Actinotrichida)

Fig. 11

A schematic evolutionary scenario for the development of oil gland compounds and defensive secretion amounts in the Ptyctima (Euphthiracaroidea and Phthiracaroidea) and the proposed outgroup - the Collohmannioidea - summarizing currently available data. The dashed line connecting Euphthiracaridae and Oribotritiidae denotes unsolved phylogenetic relationships among both taxa. Furthermore, the Synichotritiidae, a euphthiracaroid family that has lost the glands (see text), is omitted. I = δ-acaridial; II = β-springene; a = chrysomelidial; b = 2-hydroxy-6-methylbenzaldehyde; c = citral (geranial/neral); d = γ-acaridial; e = neryl formate

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