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Authordc.contributor.authorCollado, Gonzalo A. 
Authordc.contributor.authorEspoz, Carmen es_CL
Authordc.contributor.authorMéndez, Marco es_CL
Authordc.contributor.authorBrown, Donald I. es_CL
Admission datedc.date.accessioned2009-07-09T17:12:00Z
Available datedc.date.available2009-07-09T17:12:00Z
Publication datedc.date.issued2008-12
Cita de ítemdc.identifier.citationINVERTEBRATE REPRODUCTION & DEVELOPMENT, V.: 52, issue: 1-2, p.: 13-21, DEC 2008.en
Identifierdc.identifier.issn0792-4259
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/123907
Abstractdc.description.abstractThis study presents results of the examination of the ultrastructure of the spermatozoon of seven South American species of Tegula using light and transmission electron microscopy. In all cases the spermatozoa were of the primitive or ect-aquaspermatozoon type, common in species which employ external fertilization as part of their reproductive strategy. The spermatozoon of Tegula, from anterior to posterior, are composed of: (a) a bullet-shaped head with an anterior acrosome and a basal nucleus, (b) a mid-piece with a prevalent number of five mitochondria plus proximal and distal centrioles, and (c) a flagellum with a 9+2 arrangement of microtubules. The ultrastructural dimensions of the spermatozoa and the characteristics of the acrosome and the nucleus of the Tegula species studied here, as well as those previously published in the literature, showed that each species produces male gametes having a species-specific morphology. The results also suggest that the ultrastructure of the spermatozoon could be potentially useful for recognizing subgenera within Tegula. The comparative study showed that some characters of the spermatozoon of the Tegulinae (e.g. length of the head, acrosome shape, acrosome length as percentage of total head length) agree with fossil, morphological and molecular evidence which suggest that members of this subfamily are more closely related to representative of the family Turbinidae.en
Patrocinadordc.description.sponsorshipThe work at the Universidad de Valparaíso was supported by the DIPUV 36/2004 Grant. This contribution was partially financed by the Departamento de Postgrado y Postítulo of the Universidad de Chile: Fellowship Nº PG/01/2003 to G.A.C. and FONDECYT 1061256 to M.A.M.en
Lenguagedc.language.isoenen
Publisherdc.publisherINT SCIENCE SERVICES/BALABAN PUBLISHERSen
Keywordsdc.subjectTegulinaeen
Títulodc.titleSpermatozoon ultrastructure in seven South American species of Tegula Lesson, 1835 (Mollusca: Vetigastropoda) and the phylogenetic implications for the subfamily Tegulinaeen
Document typedc.typeArtículo de revista


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