The book The Coccidae was written by author Alexander Dyer Macgillivray Here you can read free online of The Coccidae book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Coccidae a good or bad book?
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These instead of being at the cephalic end of the anal cleft are at the caudal end and form a part of the caudal margin. Each operculum bears a single large seta, an anal seta, and often other much smaller setae. The opercula are con- sidered as the homologues of the anal lobes and by some as the homologues of the last abdominal segment, but more strictly should be homologized with the penultimate segment. The thoracic spiracles are always present, but there is some variation in the presence an...d size of the canellae, stigmatic clefts, spinae, and spiracerores. The anal ring and the anal ring setae are present and situated at the cephalic end of the anal tube which opens at the cephalic end of the anal cleft. The anal ring and anal tube and their associated parts are frequently extruded as a bag-like structure after treatment with caustic potash. The possession of an anal ring and anal ring setae and especially of anal lobes and anal setae in the first nymphal stage shows that there is a phylogenetic relationship existing between the lecaniids and eriococcids.
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