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Chromosome cycle in the gregarine Stylocephalus mesomorphi Dev.

Published online by Cambridge University Press:  06 April 2009

R. N. Desai
Affiliation:
Department of Zoology, Karnatak Science College, Dharwar, India

Extract

The gregarine Stylocephalus mesomorphi has a diploid chromosome number of 8. The diploid stage is represented only by the zygote nucleus before the metagamic divisions start. The other stages in the entire life history of this gregarine are haploid.

The mitotic chromosomes are four in number, one being the longest, two of medium size and the fourth the smallest.

I am grateful to Professor J. C. Uttangi, Head of the Zoology Department, Karnatak Science College, Dharwar, for the encouragement he gave me throughout this work. I am also greatly indebted to my colleague Dr M. J. Devadhar, for having given me many valuable suggestions.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1966

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References

REFERENCES

Calkins, G. N. & Bowling, R. C. (1926). Gametic meiosis in Monocystis. Biol. Bull. mar. biol. Lab., Woods Hole, 51, 385–99.CrossRefGoogle Scholar
Chakravarty, M. M. (1935). Studies on Sporozoa from Indian millipedes. IV. Life history of a cephaline gregarine, Hyalosporina cambolopsisae, n.gen., n.sp. Arch. Protistenk. 86, 211–18.Google Scholar
Devadhar, M. J. (1962). Studies on gregarines of arthropods of Mysore State. Ph.D. thesis (unpublished).Google Scholar
Grell, K. G. (1940). Der Kernphasenwechsel von Stylocephalus (Stylorhynchus) longicollis F. Stein. Arch. Protistenk. 94, 161200.Google Scholar
Jameson, A. P. (1920). The chromosome cycle in gregarines, with special reference to Diplocystis schneideri Kunstler. Q. Jl microsc. Sci. 64, 207–66.Google Scholar
MacDougall, M. M. (1942). A study of the temperature effects on the gregarines of Tenebrio larvae. J. Parasit. 28, 233–41.CrossRefGoogle Scholar
Muslow, K. (1911). Über Fortpflanzungserscheinungen bei Monocystis rostrata n.sp. Arch. Protistenk. 22, 2055.Google Scholar
Narasimhamurti, C. C. & Ganapati, P. N. (1961). Observations on the sporogony and chromosome cycle of Gregarina poecilocerum. J. Parasit. 47, 419–24.Google Scholar
Naville, A. (1872). Le cycle chromosomique d'Urospora lagidis (De Saint Joseph). Parasitology, 19, 100–38.CrossRefGoogle Scholar
Noble, E. R. (1938). The life cycle of Zygosoma globosum sp.nov., a gregarine parasite of Urechis caupo. Univ. Calif. Publ. Zool. 43, 4166.Google Scholar
Phillips, N. E. & Mackinnon, D. L. (1946). Observations on a monocystid gregarine, Apolocystis elongata n.sp. in the seminal vesicles of Eisenia foetida. Parasitology, 37, 6574.Google Scholar
Ray, H. N. & Chakravarty, M. M. (1933). Studies on Sporozoa from Indian millipedes. II. The life history of a cephaline gregarine, Monoductus lunatus n.gen., n.sp. Arch. Protistenk. 81, 352–60.Google Scholar
Schellack, C. (1907). Über die Entwicklung and Fortpflanzung von Echinomera hipsida. Arch. Protistenk. 9, 297345.Google Scholar
Sprague, V. (1941). Studies on Gregarina blattarum with particular reference to the chromosome cycle. Illinois biol. Monogr. 18, 157.Google Scholar
Trégouboff, G. (1914). Sur l'évolution sexuelle de Stenophora juli A. Schneider et la position systématique de la famille des Stenophorides Léger et Duboscq. Archs. Zool. exp. gén. 541 (Notes et Rev.) 1930.Google Scholar
Uttangi, J. C. & Desai, R. N. (1963). Chromosome cycle in the gregarine Stylocephalus mesomorphi Dev. Naturwissenschaften, 50, 361–2.Google Scholar
Valkanov, A. (1935). Untersuchungen über den Entwicklungskreis eines Turbellarien–parasiten Monocystella arndti. Z. ParasitKde. 7, 517–38.Google Scholar
Weschenfelder, R. (1938). Die Entwicklung von Actinocephalus parvus Wellmer. Arch. Protistenk. 91, 260.Google Scholar