Sperm ultrastructure in two species of Brachidontes (Bivalvia, Mytilidae) from the south-western Atlantic Ocean

Brachidontes rodriguezii and Brachidontes purpuratus have a wide geographic distribution along the Argentinean coast. Both species are abundant in the intertidal area of rocky shores. We used transmission electron microscopy to study the spermatogenesis of B. rodriguezii and the structure of mature...

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Autor principal:	Giménez, Juliana
Publicado:	2015
Materias:	acrosomal complex Brachidontes purpuratus Brachidontes rodriguezii intertidal spermatozoa bivalve morphogenesis morphology phylogeny rocky shore sperm ultrastructure Argentina Atlantic Ocean Atlantic Ocean (Southwest) Bivalvia Brachidontes Mytilidae
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00253154_v95_n5_p991_Torroglosa http://hdl.handle.net/20.500.12110/paper_00253154_v95_n5_p991_Torroglosa
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00253154_v95_n5_p991_Torroglosa
record_format	dspace
spelling	paper:paper_00253154_v95_n5_p991_Torroglosa2023-06-08T14:52:55Z Sperm ultrastructure in two species of Brachidontes (Bivalvia, Mytilidae) from the south-western Atlantic Ocean Giménez, Juliana acrosomal complex Brachidontes purpuratus Brachidontes rodriguezii intertidal spermatozoa bivalve morphogenesis morphology phylogeny rocky shore sperm ultrastructure Argentina Atlantic Ocean Atlantic Ocean (Southwest) Bivalvia Brachidontes Brachidontes rodriguezii Mytilidae Brachidontes rodriguezii and Brachidontes purpuratus have a wide geographic distribution along the Argentinean coast. Both species are abundant in the intertidal area of rocky shores. We used transmission electron microscopy to study the spermatogenesis of B. rodriguezii and the structure of mature spermatozoa from B. rodriguezii and B. purpuratus. Our results show that spermatogenesis in B. rodriguezii is very similar to that reported in other mytilids. The spermatozoa of both Brachidontes are of the primitive or ect-aquasperm type showing a spherical nucleus capped by a conical acrosome with an anterior extension. The chromatin was electron-dense, homogeneous and compact. The mid-piece region consisted of 5 spherical mitochondria grouped in a ring around a pair of short cylindrical centrioles. The flagellum exhibit the typical 9 + 2 microtubule structure. Studies of spermatozoa ultrastructure are considered a useful tool in bivalve phylogeny. Characters in the spermatozoa morphology of these two species were observed and a brief discussion about the sperm morphology along the distribution of both species is presented. We suggest that the acrosome complex presents the most significant differences between both species. Copyright © Marine Biological Association of the United Kingdom 2015. Fil:Giménez, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00253154_v95_n5_p991_Torroglosa http://hdl.handle.net/20.500.12110/paper_00253154_v95_n5_p991_Torroglosa
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	acrosomal complex Brachidontes purpuratus Brachidontes rodriguezii intertidal spermatozoa bivalve morphogenesis morphology phylogeny rocky shore sperm ultrastructure Argentina Atlantic Ocean Atlantic Ocean (Southwest) Bivalvia Brachidontes Brachidontes rodriguezii Mytilidae
spellingShingle	acrosomal complex Brachidontes purpuratus Brachidontes rodriguezii intertidal spermatozoa bivalve morphogenesis morphology phylogeny rocky shore sperm ultrastructure Argentina Atlantic Ocean Atlantic Ocean (Southwest) Bivalvia Brachidontes Brachidontes rodriguezii Mytilidae Giménez, Juliana Sperm ultrastructure in two species of Brachidontes (Bivalvia, Mytilidae) from the south-western Atlantic Ocean
topic_facet	acrosomal complex Brachidontes purpuratus Brachidontes rodriguezii intertidal spermatozoa bivalve morphogenesis morphology phylogeny rocky shore sperm ultrastructure Argentina Atlantic Ocean Atlantic Ocean (Southwest) Bivalvia Brachidontes Brachidontes rodriguezii Mytilidae
description	Brachidontes rodriguezii and Brachidontes purpuratus have a wide geographic distribution along the Argentinean coast. Both species are abundant in the intertidal area of rocky shores. We used transmission electron microscopy to study the spermatogenesis of B. rodriguezii and the structure of mature spermatozoa from B. rodriguezii and B. purpuratus. Our results show that spermatogenesis in B. rodriguezii is very similar to that reported in other mytilids. The spermatozoa of both Brachidontes are of the primitive or ect-aquasperm type showing a spherical nucleus capped by a conical acrosome with an anterior extension. The chromatin was electron-dense, homogeneous and compact. The mid-piece region consisted of 5 spherical mitochondria grouped in a ring around a pair of short cylindrical centrioles. The flagellum exhibit the typical 9 + 2 microtubule structure. Studies of spermatozoa ultrastructure are considered a useful tool in bivalve phylogeny. Characters in the spermatozoa morphology of these two species were observed and a brief discussion about the sperm morphology along the distribution of both species is presented. We suggest that the acrosome complex presents the most significant differences between both species. Copyright © Marine Biological Association of the United Kingdom 2015.
author	Giménez, Juliana
author_facet	Giménez, Juliana
author_sort	Giménez, Juliana
title	Sperm ultrastructure in two species of Brachidontes (Bivalvia, Mytilidae) from the south-western Atlantic Ocean
title_short	Sperm ultrastructure in two species of Brachidontes (Bivalvia, Mytilidae) from the south-western Atlantic Ocean
title_full	Sperm ultrastructure in two species of Brachidontes (Bivalvia, Mytilidae) from the south-western Atlantic Ocean
title_fullStr	Sperm ultrastructure in two species of Brachidontes (Bivalvia, Mytilidae) from the south-western Atlantic Ocean
title_full_unstemmed	Sperm ultrastructure in two species of Brachidontes (Bivalvia, Mytilidae) from the south-western Atlantic Ocean
title_sort	sperm ultrastructure in two species of brachidontes (bivalvia, mytilidae) from the south-western atlantic ocean
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00253154_v95_n5_p991_Torroglosa http://hdl.handle.net/20.500.12110/paper_00253154_v95_n5_p991_Torroglosa
work_keys_str_mv	AT gimenezjuliana spermultrastructureintwospeciesofbrachidontesbivalviamytilidaefromthesouthwesternatlanticocean
_version_	1768546709675180032

Sperm ultrastructure in two species of Brachidontes (Bivalvia, Mytilidae) from the south-western Atlantic Ocean

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