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Marchena
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The only North American respresentative of this common Old World subfamily,
this species is immediately recognized by the tubercles on the first leg.
California, Washington, Nevada.
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For more information and links to the species, go to Marchena in the Tree of Life.
References most relevant to species north of Mexico: Maddison (1987).
Identification
Along the front face of the first femur are a series of 3-5 tubercles, each bearing a seta. The carapace side is rugose, and together with the tubercles probably forms a stridulatory apparatus.
Habitat
Bark-dwelling on conifers.