Spermatogenesis in the marine snail Adelomelon ancilla (Volutidae) from Patagonia

This study describes euspermatogenesis and paraspermatogenesis in Adelomelon ancilla (Volutidae) and compares them with the same processes in other caenogastropods. Spermatogenesis in A. ancilla followed the general developmental pattern of caenogastropods. The pattern of nuclear condensation involv...

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Autores principales: Zabala, S., Hermida, G.N., Giménez, J.
Formato: JOUR
Materias:
cytoplasm
gastropod
marine ecosystem
reproductive productivity
snail
spermatophore
Patagonia
Adelomelon
Ancilla
Caenogastropoda
Gastropoda
Volutidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02601230_v78_n1_p52_Zabala
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02601230_v78_n1_p52_Zabala
record_format dspace
spelling todo:paper_02601230_v78_n1_p52_Zabala2023-10-03T15:11:47Z Spermatogenesis in the marine snail Adelomelon ancilla (Volutidae) from Patagonia Zabala, S. Hermida, G.N. Giménez, J. cytoplasm gastropod marine ecosystem reproductive productivity snail spermatophore Patagonia Adelomelon Ancilla Caenogastropoda Gastropoda Volutidae This study describes euspermatogenesis and paraspermatogenesis in Adelomelon ancilla (Volutidae) and compares them with the same processes in other caenogastropods. Spermatogenesis in A. ancilla followed the general developmental pattern of caenogastropods. The pattern of nuclear condensation involves granular, fibrillar, lamellar and homogenous electron-dense phases. Acrosome development begins with the posteriorly located proacrosomal vesicle arising from the Golgi complex in euspermatids. The proacrosomal vesicle develops into a preattachment acrosome which, together with the Golgi body, later moves towards the apex of the nucleus. In the early stage of paraspermatogenesis, the pattern of chromatin distribution in dense patches, together with the cytoplasmatic characteristics of paraspermatogonia, allows the recognition of the apyrene line from the euspermatogonia. Later features, including the peripheral condensation of nuclear chromatin followed by nuclear invagination, the posterior breakdown into nuclear vesicles ('caryomerites'), centriole multiplication and the synthesis of secretory products, are the most conspicuous changes in the process of paraspermatogenesis. © 2011 The Author. Fil:Zabala, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Hermida, G.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Giménez, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02601230_v78_n1_p52_Zabala
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic cytoplasm
gastropod
marine ecosystem
reproductive productivity
snail
spermatophore
Patagonia
Adelomelon
Ancilla
Caenogastropoda
Gastropoda
Volutidae
spellingShingle cytoplasm
gastropod
marine ecosystem
reproductive productivity
snail
spermatophore
Patagonia
Adelomelon
Ancilla
Caenogastropoda
Gastropoda
Volutidae
Zabala, S.
Hermida, G.N.
Giménez, J.
Spermatogenesis in the marine snail Adelomelon ancilla (Volutidae) from Patagonia
topic_facet cytoplasm
gastropod
marine ecosystem
reproductive productivity
snail
spermatophore
Patagonia
Adelomelon
Ancilla
Caenogastropoda
Gastropoda
Volutidae
description This study describes euspermatogenesis and paraspermatogenesis in Adelomelon ancilla (Volutidae) and compares them with the same processes in other caenogastropods. Spermatogenesis in A. ancilla followed the general developmental pattern of caenogastropods. The pattern of nuclear condensation involves granular, fibrillar, lamellar and homogenous electron-dense phases. Acrosome development begins with the posteriorly located proacrosomal vesicle arising from the Golgi complex in euspermatids. The proacrosomal vesicle develops into a preattachment acrosome which, together with the Golgi body, later moves towards the apex of the nucleus. In the early stage of paraspermatogenesis, the pattern of chromatin distribution in dense patches, together with the cytoplasmatic characteristics of paraspermatogonia, allows the recognition of the apyrene line from the euspermatogonia. Later features, including the peripheral condensation of nuclear chromatin followed by nuclear invagination, the posterior breakdown into nuclear vesicles ('caryomerites'), centriole multiplication and the synthesis of secretory products, are the most conspicuous changes in the process of paraspermatogenesis. © 2011 The Author.
format JOUR
author Zabala, S.
Hermida, G.N.
Giménez, J.
author_facet Zabala, S.
Hermida, G.N.
Giménez, J.
author_sort Zabala, S.
title Spermatogenesis in the marine snail Adelomelon ancilla (Volutidae) from Patagonia
title_short Spermatogenesis in the marine snail Adelomelon ancilla (Volutidae) from Patagonia
title_full Spermatogenesis in the marine snail Adelomelon ancilla (Volutidae) from Patagonia
title_fullStr Spermatogenesis in the marine snail Adelomelon ancilla (Volutidae) from Patagonia
title_full_unstemmed Spermatogenesis in the marine snail Adelomelon ancilla (Volutidae) from Patagonia
title_sort spermatogenesis in the marine snail adelomelon ancilla (volutidae) from patagonia
url http://hdl.handle.net/20.500.12110/paper_02601230_v78_n1_p52_Zabala
work_keys_str_mv AT zabalas spermatogenesisinthemarinesnailadelomelonancillavolutidaefrompatagonia
AT hermidagn spermatogenesisinthemarinesnailadelomelonancillavolutidaefrompatagonia
AT gimenezj spermatogenesisinthemarinesnailadelomelonancillavolutidaefrompatagonia
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