RESEARCH PAPER
Gametogenic cycle in Vertigo pusilla O. F. Müller, 1774 (Gastropoda: Pulmonata: Vertiginidae)
 
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1
Department of General Zoology, Zoological Institute, Wrocław University, Poland
 
2
Museum of Natural History, Wrocław University, Poland
 
 
Submission date: 2005-04-04
 
 
Acceptance date: 2005-05-15
 
 
Publication date: 2020-07-03
 
 
Folia Malacol. 2005;13(1):43-47
 
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ABSTRACT
Gonads of V. pusilla at various growth stages were examined with standard histological methods. The first gonial cells appeared at the stage of 3.3 whorls: few and poorly developed gonad vesicles contained fine mitotically dividing cells and cells in meiotic prophase, with the first growing oocytes in the peripheral parts of the vesicles. At 4-whorl stage the oocytes entered vitellogenesis and increased in volume. In subadult individuals the oocyte volume and the gonad volume increased considerably; besides the advanced vitellogenic oocytes new oocytes appeared, the number of spermatids increased and the first spermatozoa were observed. The gonad of pre-reproductive adults contained numerous late-vitellogenic oocytes, young growing oocytes and many spermatozoa. In post-reproductive individuals there were no mature oocytes, spermatozoa were few, but the presence of young oocytes and mitotically dividing cells indicated resumption of gamete production.
 
CITATIONS (4):
1.
Delayed maturation in the genus Vestia P. Hesse (Gastropoda: Pulmonata: Clausiliidae): a model for clausiliid lifecycle strategy
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2.
Contribution to the biology of ten vertiginid species
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4.
Gametic cycle and gonadal maturity of Bulimulus bonariensis (Rafinesque, 1833) (Gastropoda: Bulimulidae), in a rural area of Buenos Aires, Argentina
Ana Díaz, Stella Martin, Alejandra Rumi
PeerJ
 
eISSN:2300-7125
ISSN:1506-7629
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