Reproductive system development and annual cycle of gonad activity in Helicodonta obvoluta (O. F. Müller, 1774) (Gastropoda: Pulmonata: Helicidae s. lat.)
More details
Hide details
Museum of Natural History, Wrocław University, Poland
Publication date: 2020-07-13
Corresponding author
Tomasz K. Maltz   

Museum of Natural History, Wrocław University, Sienkiewicza 21, 50-335 Wrocław, Poland
Folia Malacol. 2003;11(1-2):23-31
The reproductive system structure in H. obvoluta follows the helicid pattern except for the dart sac which is absent. In juvenile snails the gonad is the first to develop; the later development of male and female reproductive organs is synchronous. At the stage of lip formation the reproductive system is fully developed. At an initial stage of the gonad development (3 and 4 whorls) mitotically dividing cells prevail, and the first pools of oocytes and spermatocytes in meiotic prophase appear. At the stage of 5 whorls the number of mitoses decreases, while the number of cells in meiotic prophase increases considerably, resulting in an increase in the gonad volume. The first growing oocytes appear, while spermatids and mature spermatozoa are absent. The gonad in lip-building snails contains all the cells characteristic of mature hermaphroditic gland. In mature gonad oocytes and spermatozoa are present throughout the year. The number and size of oocytes vary seasonally. Large vitellogenic oocytes are present from April till the beginning of July and from the end of August till October. The pool of growing oocytes appears in August and in November–December. The intensity of divisions leading to formation of the respective gametes changes in a similar way. The development of female lineage cells seems to determine the timing of reproduction, since spermatozoa are present throughout the year.
Delayed maturation in the genus Vestia P. Hesse (Gastropoda: Pulmonata: Clausiliidae): a model for clausiliid lifecycle strategy
T. Maltz, A. Sulikowska-Drozd
Journal of Molluscan Studies
Life History ofAlinda biplicata(Montagu, 1803) (Gastropoda: Pulmonata: Clausiliidae) Based on Five-Year Laboratory Observations
Tomasz Maltz, Anna Sulikowska-Drozd
Annales Zoologici
Life Cycles of Clausiliids of Poland — Knowns and Unknowns
Tomasz Maltz, Anna Sulikowska-Drozd
Annales Zoologici
New Insights into the Gametogenesis of Biomphalaria glabrata (Mollusca, Gastropoda, Pulmonata): Implications for Histopathological Assessment
Cândido Rodrigues, Maxwell Caixeta, Thiago Rocha
Brazilian Archives of Biology and Technology
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
Association between reproductive stage and shell morphology in the giant African snail Lissachatina fulica
Angie Patiño-Montoya, Bárbara Luísa Borges, Rosana Tidon
Journal of Molluscan Studies
Journals System - logo
Scroll to top