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Female.
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Anal shield.
The anus is in the anterior half of the anal shield. |
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Sternal shield
It is differentiated from Ornithonyssus sylviarum by having three pairs of setae on
the sternal shield. |
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Chelicerae.
In the genus Ornithonyssus the chelicerae are much stouter than thouse of Dermanyssus
and the chelae are easily visible under ordinary magnification. |