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Fig. 2 (above): Dorsal chaetotaxy of fifth abdominal segment of Ceratophysella engadinensis collected from Carrigeencorlough, Leitrim, Ireland in July 1971. Note the absence (*) of seta a2' (present in Ceratophysella denticulata) (M (macroseta) = p1, s (sensilla) = p3).
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