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Sperm morphology of two species of Olivancillaria (Gastropoda: Olividae) from the south-western Atlantic

Published online by Cambridge University Press:  16 October 2012

Valeria Teso  and
Juliana Giménez
Valeria Teso*
Affiliation:
CONICET—Museo Argentino de Ciencias Naturales ‘Bernardino Rivadavia', Avenida Angel Gallardo 470, Laboratorio 57, C1405DJR Buenos Aires, Argentina
Juliana Giménez
Affiliation:
CONICET—Laboratorio de Biología de Invertebrados Marinos, DBBE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
*
Correspondence should be addressed to: V.Teso, CONICET—Museo Argentino de Ciencias Naturales ‘Bernardino Rivadavia', Avenida Angel Gallardo 470, Laboratorio 57, C1405DJR Buenos Aires, Argentina email: [email protected]
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Abstract

Sperm ultrastructure in two species of the marine snail family Olividae is examined. Euspermatozoa of both species are composed of a conical, membrane-bound acrosomal vesicle; an axial rod and a basal plate similar in both species; a solid and highly electron-dense nucleus; an elongate midpiece consisting of the axoneme sheathed by helical mitochondrial elements; an elongate glycogen piece; a double electron-dense ring at the junction of the midpiece and glycogen piece; and a free tail region. The slight narrowing in the acrosomal vesicle invagination is situated in different levels between Olivancillaria deshayesiana and Olivancillaria carcellesi. This morphology could be considered as a specific character. The length of the nucleus in O. carcellesi and in O. deshayesiana is shorter than that of other neogastropods, and could be diagnostic at family level.

Keywords

ArgentinaOlivancillaria deshayesianaOlivancillaria carcellesisperm ultrastructure
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 93 , Issue 3 , May 2013 , pp. 825 - 831
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012

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