Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-23T08:17:56.848Z Has data issue: false hasContentIssue false
  • English
  • Français

Observations on the origin and fate of flagellated gametes in multiple tests of discorbis (foraminifera)

Published online by Cambridge University Press:  11 May 2009

Earl H. Myers
Earl H. Myers
Affiliation:
John Simon Guggenheim Fellow
Get access Rights & Permissions [Opens in a new window]

Extract

It has long been presumed that the gametes of certain Foraminifera are flagellated; however, the lack of conclusive evidence as to the origin and fate of these flagellated gametes has made their existence problematical.

In syzygous species of Discorbis the gametes are flagellated and the genetic relationship of these gametes is easily demonstrated, since gametogenesis, fertilization, and the development of two- and three-chambered multinucleate microspheric agamonts takes place within the excavated tests of two or more mononucleate megalospheric gamonts associated in syzygy.

The life cycle of Discorbis herein described is in general agreement with the life cycle of Polystomella crispa proposed by J. J. Lister, and completes an interesting series of life cycles in which a progressive modification in behaviour and test morphology can be traced.

Behaviour, ecology, and distribution of four syzygous species of Discorbis are discussed.

Multiple tests of these syzygous species of Foraminifera can be found in most rock-bottomed tide pools that supports a growth of coralline algae. These sexual groups provide a sure source of material for the demonstration of flagellated gametes in the Foraminifera.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 24 , Issue 1 , January 1940 , pp. 201 - 225
Copyright
Copyright © Marine Biological Association of the United Kingdom 1940

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Brady, H. B., 1884. Report on the Foraminifera dredged by H.M.S. Challenger during the years 1873–6. Challenger Reports, Vol. IX, Zoology.Google Scholar
Calvez, J. Le, 1938. Recherches sur les Foraminiféres, Protistologica, LXXXVI. Arch. Zool. Exper. Gén., Tome 80, pp. 163–333, Pls. II a VII.Google Scholar
Føyn, Bjorn, 1936 a. Über die Kernverhältnisse der Foraminifere Myxotheca arenilega Schaudinn. Arch. f. Protisten. Bd. 87, Heft 2.Google Scholar
Føyn, Bjorn 1936b. Foraminiferenstudien. I. Der Lebenszyklus von Discorbina vilardeboana d'Orbigny. Bergens Mus. Arb. 1936, Natur. rekke Nr. 2.Google Scholar
Føyn, Bjorn 1937. Foraminiferenstudien. II. Zur Kenntnis der asexuellen Fortpflanzung und der Entwicklung der Gamonten von Discorbina vilardeboana. Bergens Mus. Arb. 1937, Natur. rekke Nr. 5.Google Scholar
Heron-Allen, E., 1915. Contributions to the study of bionomics and reproductive processes in the Foraminifera. Phil. Trans. Roy. Soc., B, Vol. 206, pp. 227–79.Google Scholar
Lister, J. J., 1895. Contributions to the life history of the Foraminifera. Phil. Trans. Roy. Soc., B. Vol. 186, pp. 401–53, Pls. 6–9.Google Scholar
Lister, J. J. 1903. Foraminifera, in E. Ray Lankester, A Treatise on Zoology, pt 1, 2nd fasc., pp. 47–149.Google Scholar
Myers, E. H., 1933. Multiple tests in the Foraminifera. Proc. Nat. Acad. Sci., Vol. 19, No. 10, pp. 893–9.CrossRefGoogle ScholarPubMed
Myers, E. H. 1935. The life history of Patellina corrugata Williamson, a foraminifer. Bull Scripps Inst. Ocean. La jolla, Tech. Ser. 3, No. 15.Google Scholar
Myers, E. H. 1936. The life cycle of Spirillina vivipara Ehrenberg, with notes on morphogenesis, systematics and distribution in the Foraminifera. Jour. Roy. Micr. Soc. Vol. 56, pp. 120–46.Google Scholar
Myers, E. H. 1937. Culture methods for marine Foraminifera of the littoral zone, in Culture Methods for Invertebrate Animals, Galtsoff, Paul, et al. Comstock Publishing Company, Ithaca, New York.Google Scholar
Myers, E. H. 1938. The present state of our knowledge concerning the life cycle of the Foraminifera. Proc. Nat. Acad. Sci., vol. 24, No. 1, pp. 10–17.CrossRefGoogle ScholarPubMed
Rhumbler, L., 1913. Die Foraminiferen (Thalmaporen) der Plankton Expedition. Erg. Plankton Exp. Humboldt Stiftung, 3, l.c. Kiel und Leipzig.Google Scholar
Schaudinn, F., 1895. Über Plastogamie bei Foraminifera. Sitz. Berichte ges. naturf. Freunde, Bd. 10, p. 170, Berlin.Google Scholar
Schaudinn, F. 1903. Untersuchungen über die Fortpfianzung einiger Rhizopoden. Arb. a. d. Kais. Gesundheitsamte, Bd. 19, Heft 3, pp. 547–76.Google Scholar
Vaughan, T. Wayland, 1933. The biogeographic relations of the orbitoid Foraminifera. Proc. Nat. Acad. Sci., Vol. 19, No. 10, pp. 893–938.Google Scholar
Winter, F. W., 1907. Zur Kenntniss der Thalmaporen. I. Untersuchungen über Peneroplis pertusus. Arch. f. Protisten. Bd. 10, p. 83.Google Scholar
Wright, T. Strethill, 1861. On the reproductive elements of the Rhizopoda. Ann. Mag. Nat. Hist., Ser. 3, Vol. VII, p. 360.Google Scholar