Abstract
IN all the members of the family Nepidæ (Hemiptera–Heteroptera) investigated so far from the above point of view, the diploid number of chromosomes in the male germ-cells has been reported to be 43–38 autosomes and 5 sex chromosomes1–4. Chickering's5 account of the chromosomes of Ranatra linearis, according to which the spermatogonia of this insect are of two kinds, one type possessing 40, and the other 48–50 chromosomes, has been shown to be erroneous by Steopoe2.
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References
Steopoe, I., C.R. Soc. Biol., Paris, 92, 1476 (1925).
Steopoe, I., C.R. Soc. Biol., Paris, 96, 1030 (1927).
Steopoe, I., Ann. Sci. Univ. Jassy, 16, 611 (1931).
Dass, C. M. S., Caryologia, 4, 1 (1952).
Chickering, A. M., Trans. Amer. Micro. Soc., 37, 132 (1918).
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SRIVASTAVA, M., DAS, C. Sex Chromosomes of Ranatra elongata. Nature 172, 505 (1953). https://doi.org/10.1038/172505a0
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DOI: https://doi.org/10.1038/172505a0
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