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28. Vertex (a1) and mesosomal dorsum with strong, elongate setae. Peg sensilla of flagellum always strongly (b1) asymmetrical, never mushroom-shaped. Male genitalia (c1) without volsellar setae, but sometimes (c2) one pair of parameral setae placed in same area as volsellar setae (and probably are volsellar setae); parameres (d2: p) often elongate or sinuate (especially helpful in species with ambiguously placed parameral setae). Body <1mm in length; color always brownish with weak metallic luster (d1).

Perditorulus Hansson, 1996

28'. Combination of characters not present: vertex and mesosomal dorsum rarely with elongate setae (aa1). Peg sensilla of flagellum only asymmetrical in some Omphale, usually short and L-shaped (bb1). Male genitalia always with volsellar setae and short parameres (cc1, cc2). Body generally different in color, size and shape.

couplet 29

a1

aa1
perditorulus_face2.jpg (83556 bytes)

omphale face1.JPG (19173 bytes)

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b1

bb1

perditorulus_sensilla.jpg (30080 bytes)

omphale type2 sensilla.JPG (14373 bytes)

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c1

c2

cc1

cc2
perditorulus genitalia.JPG (8989 bytes) perditorulus longiparameratus genitalia.JPG (13957 bytes)

omphale setae1.JPG (9759 bytes)

 omphale setae2.JPG (8300 bytes)

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d1

perditorulus.jpg (193794 bytes)

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Image credits: c1-2: Hansson (1996c). aa1, bb1, cc1-2: Hansson (1996a).