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A–C. Diagrammatic representations of venom apparatus features in the Rogadinae. —A. Showing terminology of venom ducts. —B, C. Detail of the internal structure of the recessed insertion of the secondary duct on to the reservoir, showing filaments in a cone arrangement (B) and indicating the hypothesized result of the contraction of muscles associated with insertion causing an increase in the degree of recess and consequent separation of filaments (C).
