单词 | Isopoda |
例句 | A division of Crustacea, which, in some its characteristics, is intermediate between Amphipoda and Isopoda. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z The parasitic habit is most common among the Copepoda and Isopoda, where it leads to complex modifications of structure and life-history. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z On the other side, the Isopoda lead to the Myriapoda, and the latter to the Insecta. Critiques and Addresses To the question, how far the development of Ligia is repeated in the other Isopoda, I can only give an unsatisfactory answer. Facts and Arguments for Darwin A few Isopoda are known from Secondary rocks, but their systematic position is doubtful and they throw no light on the evolution of the group. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z The same may be said, for example, of the Isopoda and Amphipoda. Facts and Arguments for Darwin In the parasitic Copepoda and Isopoda the disparity in size is carried to an extreme degree, and the minute male is attached, like a parasite, to the enormously larger female. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z How earlier young states may gradually be completely lost, is shown by Mysis and the Isopoda. Facts and Arguments for Darwin All the other limbs are usually well developed in the young Isopoda. Facts and Arguments for Darwin As we have already seen, Mysis and the Isopoda depart from all other Crustacea very remarkably by the fact that their embryos are curved upwards, instead of, as elsewhere, downwards. Facts and Arguments for Darwin In all other Isopoda the heart is removed towards the abdomen. Facts and Arguments for Darwin In the Decapoda three pairs are thus modified, and in the Tanaidacea, Isopoda and Amphipoda only one. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z Less varied than that of the Stalk-eyed Crustacea is the mode of development of the Isopoda and Amphipoda, which Leach united in the section Edriophthalma, or Crustacea with sessile eyes. Facts and Arguments for Darwin The Amphipoda are distinguishable from the Isopoda at an early period in the egg by the different position of the embryo, the hinder extremity of which is bent downwards. Facts and Arguments for Darwin The caudal portion of the embryo in the Diastylidae, as I have recently observed, is curved upwards as in the Isopoda, and the last pair of feet of the thorax is wanting. Facts and Arguments for Darwin I would not combine the Rhizocephala with the Cirripedia, as Liljeborg has done, but place them in opposition as equivalent, like the Amphipoda and Isopoda. Facts and Arguments for Darwin In the Isopoda the respiratory function has been taken over by the abdominal appendages, both rami or only the inner becoming thin or flattened. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z |
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