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Abstract:

The ultrastructure of mature spermatozoa is investigated for the first time in the Volutidae, based on the commercially significant South American species Zidona dufresnei (Donovan, 1823) (fresh material) and supplemented with observations on testicular (museum) material of the deep sea New Zealand species Provocator mirabilis (Finlay, 1926). Euspermatozoa of Z. dufresnei (ex sperm duct) consist of: (1) a tall-conical acrosomal vesicle (with short basal invagination, constricted anteriorly) which is flattened anteriorly and associated with an axial rod, centrally perforate basal plate and short accessory membrane; (2) a rod-shaped, solid and highly electron-dense nucleus (with short basal fossa containing centriolar complex and initial portion of a 9 + 2 axoneme); (3) an elongate midpiece consisting of the axoneme sheathed by 5-6 helical mitochondrial elements, each exhibiting a dense U-shaped outer layer; (4) an elongate glycogen piece (axoneme sheathed by nine tracts of putative glycogen granules); (5) a dense annulus at the junction of the midpiece and glycogen piece and (6) a short free tail region (axoneme surrounded only by plasma membrane). Paraspermatozoa of Z. dufresnei are vermiform and dimorphic: the first type contains approximately 14-20 axonemes (arranged peripherally and interspersed with microtubules) and numerous oblong dense vesicles, numerous less dense (round) vesicles, occasional, large lipid-like vesicles, and scattered mitochondria; the second type contains 25-31 axonemes (peripherally arranged, interspersed with microtubules), occasional mitochondria and extensive cytoplasm. Results obtained for P. mirabilis from testis material are essentially as observed in Z. dufresnei, although the euspermatozoan acrosome still has to achieve its compressed transverse profile. Observations on paraspermatozoa were limited by fixation quality of available (testis) tissues, but these cells are similar to the first type of Zidona paraspermatozoa. Although most of the euspermatozoal features are also observed in many neotaenioglossans and neogastropods, the U-shaped outer layer of each mitochondrial element has not previously been reported and may prove a diagnostic feature of the Volutidae, the subfamily Zidoniinae or possibly only the Zidonini (in which Z. dufresnei and P. mirabilis are currently placed). © 2008 Springer-Verlag.

Registro:

Documento: Artículo
Título:Ultrastructure and potential taxonomic importance of euspermatozoa and paraspermatozoa in the volutid gastropods Zidona dufresnei and Provocator mirabilis (Caenogastropoda, Mollusca)
Autor:Giménez, J.; Healy, J.M.; Hermida, G.N.; Nostro, F.L.; Penchaszadeh, P.E.
Filiación:Laboratorio de Invertebrados, Depto. de Biodiversidad Y Biología Experimental, Ciudad Universitaria, Pab. II, Buenos Aires C1428EHA, Argentina
CONICET, Museo Argentino de Ciencias Naturales, Av. Angel Gallardo 470, Buenos Aires C1405DJR, Argentina
Biodiversity Program, Queensland Museum, South Bank, PO Box 3300, Brisbane, QLD 4101, Australia
Department of Zoology, Field Museum of Natural History, Chicago, IL, United States
Laboratorio de Histología Animal, Depto. de Biodiversidad Y Biología Experimental, Ciudad Universitaria, Pab. II, Buenos Aires C1428EHA, Argentina
CONICET, Laboratorio de Embriología Animal, Ciudad Universitaria, Pab. II, Buenos Aires C1428EHA, Argentina
Palabras clave:Euspermatozoa; Gastropoda; Paraspermatozoa; Sperm ultrastructure; Volutidae; Caenogastropoda; Gastropoda; Mirabilis; Mollusca; Neogastropoda; Volutidae; Zidona dufresnei
Año:2008
Volumen:127
Número:3
Página de inicio:161
Página de fin:173
DOI: http://dx.doi.org/10.1007/s00435-008-0060-x
Título revista:Zoomorphology
Título revista abreviado:Zoomorphology
ISSN:0720213X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0720213X_v127_n3_p161_Gimenez

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Citas:

---------- APA ----------
Giménez, J., Healy, J.M., Hermida, G.N., Nostro, F.L. & Penchaszadeh, P.E. (2008) . Ultrastructure and potential taxonomic importance of euspermatozoa and paraspermatozoa in the volutid gastropods Zidona dufresnei and Provocator mirabilis (Caenogastropoda, Mollusca). Zoomorphology, 127(3), 161-173.
http://dx.doi.org/10.1007/s00435-008-0060-x
---------- CHICAGO ----------
Giménez, J., Healy, J.M., Hermida, G.N., Nostro, F.L., Penchaszadeh, P.E. "Ultrastructure and potential taxonomic importance of euspermatozoa and paraspermatozoa in the volutid gastropods Zidona dufresnei and Provocator mirabilis (Caenogastropoda, Mollusca)" . Zoomorphology 127, no. 3 (2008) : 161-173.
http://dx.doi.org/10.1007/s00435-008-0060-x
---------- MLA ----------
Giménez, J., Healy, J.M., Hermida, G.N., Nostro, F.L., Penchaszadeh, P.E. "Ultrastructure and potential taxonomic importance of euspermatozoa and paraspermatozoa in the volutid gastropods Zidona dufresnei and Provocator mirabilis (Caenogastropoda, Mollusca)" . Zoomorphology, vol. 127, no. 3, 2008, pp. 161-173.
http://dx.doi.org/10.1007/s00435-008-0060-x
---------- VANCOUVER ----------
Giménez, J., Healy, J.M., Hermida, G.N., Nostro, F.L., Penchaszadeh, P.E. Ultrastructure and potential taxonomic importance of euspermatozoa and paraspermatozoa in the volutid gastropods Zidona dufresnei and Provocator mirabilis (Caenogastropoda, Mollusca). Zoomorphology. 2008;127(3):161-173.
http://dx.doi.org/10.1007/s00435-008-0060-x