Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean

The ultrastructure of mature spermatozoa and paraspermatozoa of Odontocymbiola magellanica is investigated. Euspermatozoa consist of: (1) a tall, conical acrosomal vesicle (with a short basal invagination, constricted anteriorly); (2) a rod-shaped, solid and highly electron-dense nucleus; (3) an elo...

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Detalles Bibliográficos
Autor principal: Giménez, Juliana
Publicado: 2011
Materias:
Euspermatozoa
Gastropoda
Paraspermatozoa
Sperm ultrastructure
Volutidae
marine ecosystem
maturation
mitochondrion
morphology
snail
sperm
ultrastructure
Argentina
Atlantic Ocean
Atlantic Ocean (Southwest)
Patagonia
Neogastropoda
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017272_v92_n4_p355_Gimenez
http://hdl.handle.net/20.500.12110/paper_00017272_v92_n4_p355_Gimenez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00017272_v92_n4_p355_Gimenez
record_format dspace
spelling paper:paper_00017272_v92_n4_p355_Gimenez2023-06-08T14:21:24Z Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean Giménez, Juliana Euspermatozoa Gastropoda Paraspermatozoa Sperm ultrastructure Volutidae marine ecosystem maturation mitochondrion morphology snail sperm ultrastructure Argentina Atlantic Ocean Atlantic Ocean (Southwest) Patagonia Gastropoda Neogastropoda Volutidae The ultrastructure of mature spermatozoa and paraspermatozoa of Odontocymbiola magellanica is investigated. Euspermatozoa consist of: (1) a tall, conical acrosomal vesicle (with a short basal invagination, constricted anteriorly); (2) a rod-shaped, solid and highly electron-dense nucleus; (3) an elongate midpiece consisting of the axoneme sheathed by helical mitochondrial elements each exhibiting a dense U-shaped outer layer; (4) an elongate glycogen piece; (5) a dense annulus at the junction of the midpiece and glycogen piece; and (6) a short free-tail region. Paraspermatozoa of O. magellanica are vermiform and dimorphic. First type contain approximately 14-17 axonemes (arranged peripherally and interspersed with microtubules) and numerous oblong dense vesicles, numerous less dense (round) vesicles, and scattered mitochondria; the second type contains 38-45 axonemes peripherally arranged and closer to the core region of the cell and occasional mitochondria. Most of the euspermatozoal features of O. magellanica are also observed in many neotaenioglossans and neogastropods. However, the U-shaped outer layer of each mitochondrial element has only been previously reported in the Volutidae subfamily Zidoniinae. It is now reported here in the subfamily Odontocimbiolinae and may prove to be a diagnostic feature of the Volutidae family. © 2010 The Royal Swedish Academy of Sciences. Fil:Giménez, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017272_v92_n4_p355_Gimenez http://hdl.handle.net/20.500.12110/paper_00017272_v92_n4_p355_Gimenez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Euspermatozoa
Gastropoda
Paraspermatozoa
Sperm ultrastructure
Volutidae
marine ecosystem
maturation
mitochondrion
morphology
snail
sperm
ultrastructure
Argentina
Atlantic Ocean
Atlantic Ocean (Southwest)
Patagonia
Gastropoda
Neogastropoda
Volutidae
spellingShingle Euspermatozoa
Gastropoda
Paraspermatozoa
Sperm ultrastructure
Volutidae
marine ecosystem
maturation
mitochondrion
morphology
snail
sperm
ultrastructure
Argentina
Atlantic Ocean
Atlantic Ocean (Southwest)
Patagonia
Gastropoda
Neogastropoda
Volutidae
Giménez, Juliana
Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean
topic_facet Euspermatozoa
Gastropoda
Paraspermatozoa
Sperm ultrastructure
Volutidae
marine ecosystem
maturation
mitochondrion
morphology
snail
sperm
ultrastructure
Argentina
Atlantic Ocean
Atlantic Ocean (Southwest)
Patagonia
Gastropoda
Neogastropoda
Volutidae
description The ultrastructure of mature spermatozoa and paraspermatozoa of Odontocymbiola magellanica is investigated. Euspermatozoa consist of: (1) a tall, conical acrosomal vesicle (with a short basal invagination, constricted anteriorly); (2) a rod-shaped, solid and highly electron-dense nucleus; (3) an elongate midpiece consisting of the axoneme sheathed by helical mitochondrial elements each exhibiting a dense U-shaped outer layer; (4) an elongate glycogen piece; (5) a dense annulus at the junction of the midpiece and glycogen piece; and (6) a short free-tail region. Paraspermatozoa of O. magellanica are vermiform and dimorphic. First type contain approximately 14-17 axonemes (arranged peripherally and interspersed with microtubules) and numerous oblong dense vesicles, numerous less dense (round) vesicles, and scattered mitochondria; the second type contains 38-45 axonemes peripherally arranged and closer to the core region of the cell and occasional mitochondria. Most of the euspermatozoal features of O. magellanica are also observed in many neotaenioglossans and neogastropods. However, the U-shaped outer layer of each mitochondrial element has only been previously reported in the Volutidae subfamily Zidoniinae. It is now reported here in the subfamily Odontocimbiolinae and may prove to be a diagnostic feature of the Volutidae family. © 2010 The Royal Swedish Academy of Sciences.
author Giménez, Juliana
author_facet Giménez, Juliana
author_sort Giménez, Juliana
title Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean
title_short Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean
title_full Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean
title_fullStr Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean
title_full_unstemmed Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean
title_sort euspermatozoa and paraspermatozoa in the volutid gastropod odontocymbiola magellanica, patagonia, argentina, southwestern atlantic ocean
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017272_v92_n4_p355_Gimenez
http://hdl.handle.net/20.500.12110/paper_00017272_v92_n4_p355_Gimenez
work_keys_str_mv AT gimenezjuliana euspermatozoaandparaspermatozoainthevolutidgastropododontocymbiolamagellanicapatagoniaargentinasouthwesternatlanticocean
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