Summary
-
1.
The oogonia, as they arise from the germinal epithelium, are about 10 microns in diameter.
-
2.
A growth period follows the oogonial division.
-
3.
The diploid number of chromosomes is 12.
-
4.
In the prophase stages no synapsis has been observed.
-
5.
Secondary nucleoli develop in the oocyte and disappear before polocyte formation.
-
6.
But one polocyte is formed. This takes place while the egg cell is still attached to the ovarian wall.
-
7.
there is no reduction in chromosome number in the polocyte formation.
-
8.
After extrusion of the polar body, the egg passes into the oviduct where the first cleavage is completed.
-
9.
Many abortive ova are found in some individuals, particularly in late summer months.
-
10.
All the evidences, herein presented, support the view thatCampeloma rufum reproduces normally by a diploid parthenogenesis.
Similar content being viewed by others
Bibliography
Alonte, Fidel H.: Biology ofVivipara angularis Müller, a common freshwater snail in Laguna De Bay. Philippine Agricult.19 (5), 307–325 (1930).
Ancel, P.: Histogenèse et structure de la glande hermaphrodite d'Helix pomatia (Linn.). Archives de Biol.19, 389–652 (1903).
Ankel, W. E.: Zur Befruchtungsfrage beiViviparus viviparus L. Senckenbergiana7, 37–54 (1925).
Annandale, N. andR. B. S. Sewell: The banded pondsnail of India (Vivipara bengalensis). Rec. Indiana Mus.22, 215–292 (1921).
Artom, C.: Ovogenesis abortiva e spermatogenesi aberrante in molluschi prosobranchi del genereValvata. Rend. Accad. Lincei (6)17 (6), 481–485 (1933).
Boycott, A. E.: Parthenogenesis inPaludestriana jenkinsi. J. of Conch.16 (2), 54 (1919).
Conklin, E. G.: Karyokinesis and cytokinesis in the maturation, fertilization and cleavage ofCrepidula and other gastropods. Philadelphia J. Acad. nat. Sci., II. s.,12, 1–121 (1902).
Crabb, E. D.: The fertilization process in the snail,Lymnaea stagnalis appressa Say. Biol. Bull. Mar. biol. Labor. Wood's Hole53, 67, 108 (1927).
Garnault, P.: Sur les phenomènes de la fécondation chez l'Helix aspersa et l'Arion empiricorum. Zool. Anz.11 (1889).
Gatenby, J. B.: Cytoplasmic inclusions in the germ cells of snails. Part II.Helix aspersa. Quart. J. microsc. Sci.62, 556–611 (1917).
—: Sex change in mollusca. Nature110, 544 (1922).
Jordan, H. E.: A cytological study of the egg ofCumingia. Arch. Zellforsch.4, 243–253 (1910).
Krull, H.: Anatomische Untersuchungen an einheimischen Prosobranchiern und Beiträge zur Phylogenie der Gastropoden. Zool. Jb., Abt. Anat.60, 399–464 (1935).
Lany, E.: La parthénogenèse chez les mollusques. J. de Conchyliologie Paris79 (2), 136–146 (1935).
Leydig, F.: ÜberPaludina vivipara. Ein Beitrag zur näheren Kenntnis des Tieres in embryologischer, anatomischer und histologischer Beziehung. Z. Zool.2, 125–197 (1850).
Mattox, N. T.: Sex organs and reproduction inCampeloma rufum, a fresh water snail. Anat. Rec., I. s.67 (1), 77 (1936).
Mattox, N. T.: Morphology ofCampeloma rufum, a Parthenogenetic Snail. (In Press 1938).
Pennypacker, M. I.: The germ cells in the hermaphroditic gland ofPolygyna appressa. J. Morph. a. Physiol.49 (2), 415–454 (1930).
Popoff, M.: Eibildung beiPaludina viviparo und Chromidien beiPaludina undHelix. Arch. mikrosk. Anat.70, 43–129 (1907).
Quick, H. E.: Parthenogenesis inPaludestrius jenkinsi from brachish water. J. of Conch.16 (3), 97 (1920).
Rhein, A.: Diploide Parthenogenese beiHydrobia jenkinsi Smith (Prosobranchia). Naturwiss.23, 100 (1935).
Robson, G. C.: On the anatomy ofPaludestrina jenkinsi. Ann. a. Mag. nat. History, IX. s.5, 425–431 (1920).
—: Parthenogenesis in the molluscPaludestrina jenkinsi. Brit. J. exper. Biol.1, 65–78 (1923).
Sharp, L. W.: Introduction to Cytology, 3rd Ed, New York: McGraw-Hill Book Co., Inc. 1934.
Smallwood, W. M.: Maturation, fertilization and early cleavage ofHaminea solitaria. Bull. Comp. Mus. Harvard Coll.45, 261–318 (1904).
Van Cleave, H. J. andD. A. Altringer Studies on the life cycle ofCampeloma rufum, a fresh-water snail Amer. Naturalist71, 167–184 (1937).
Whitney, D. D.: Observations on the maturation stages of the parthenogenetic and sexual eggs ofHydatina senta. J. of exper. Zool.6 (1), 137–146 (1909).
Author information
Authors and Affiliations
Additional information
With 30 figures in the text.
Contributions from the Zoological Laboratory of the University of Illinois, No. 513.
Rights and permissions
About this article
Cite this article
Mattox, N.T. Oogenesis of campeloma rufum, a parthenogenetic snail. Z.Zellforsch 27, 455–464 (1937). https://doi.org/10.1007/BF02451192
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02451192