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Abstract:

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.

Registro:

Documento: Artículo
Título:Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean
Autor:Giménez, J.
Filiación:CONICET, Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:Euspermatozoa; Gastropoda; Paraspermatozoa; Sperm ultrastructure; Volutidae; marine ecosystem; maturation; mitochondrion; morphology; snail; sperm; ultrastructure; Argentina; Atlantic Ocean; Atlantic Ocean (Southwest); Patagonia; Gastropoda; Neogastropoda; Volutidae
Año:2011
Volumen:92
Número:4
Página de inicio:355
Página de fin:362
DOI: http://dx.doi.org/10.1111/j.1463-6395.2010.00466.x
Título revista:Acta Zoologica
Título revista abreviado:Acta Zool.
ISSN:00017272
CODEN:AZOSA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017272_v92_n4_p355_Gimenez

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Citas:

---------- APA ----------
(2011) . Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean. Acta Zoologica, 92(4), 355-362.
http://dx.doi.org/10.1111/j.1463-6395.2010.00466.x
---------- CHICAGO ----------
Giménez, J. "Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean" . Acta Zoologica 92, no. 4 (2011) : 355-362.
http://dx.doi.org/10.1111/j.1463-6395.2010.00466.x
---------- MLA ----------
Giménez, J. "Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean" . Acta Zoologica, vol. 92, no. 4, 2011, pp. 355-362.
http://dx.doi.org/10.1111/j.1463-6395.2010.00466.x
---------- VANCOUVER ----------
Giménez, J. Euspermatozoa and paraspermatozoa in the volutid gastropod Odontocymbiola magellanica, Patagonia, Argentina, Southwestern Atlantic Ocean. Acta Zool. 2011;92(4):355-362.
http://dx.doi.org/10.1111/j.1463-6395.2010.00466.x