Placentation in dolphins from the Amazon River Basin: The Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilis
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional do INPA |
Texto Completo: | https://repositorio.inpa.gov.br/handle/1/16350 |
Resumo: | A recent reassessment of the phylogenetic affinities of cetaceans makes it timely to compare their placentation with that of the artiodactyls. We studied the placentae of two sympatric species of dolphin from the Amazon River Basin, representing two distinct families. The umbilical cord branched to supply a bilobed allantoic sac. Small blood vessels and smooth muscle bundles were found within the stroma of the cord. Foci of squamous metaplasia occurred in the allanto-amnion and allantochorion. The interhemal membrane of the placenta was of the epitheliochorial type. Two different types of trophoblastic epithelium were seen. Most was of the simple columnar type and indented by fetal capillaries. However, there were also areolar regions with tall columnar trophoblast and these were more sparsely supplied with capillaries. The endometrium was well vascularised and richly supplied with actively secreting glands. These findings are consistent with the current view that Cetacea are nested within Artiodactyla as sister group to the hippopotamids. © 2007 da Silva et al; licensee BioMed Central Ltd. |
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Silva, Vera Maria Ferreira daCarter, Anthony M.Ambrósio, Carlos EduardoCarvalho, Ana Flávia deBonatelli, MarinaLima, Marcelo CardosoMiglino, Maria Angelica2020-06-03T21:27:33Z2020-06-03T21:27:33Z2007https://repositorio.inpa.gov.br/handle/1/1635010.1186/1477-7827-5-26A recent reassessment of the phylogenetic affinities of cetaceans makes it timely to compare their placentation with that of the artiodactyls. We studied the placentae of two sympatric species of dolphin from the Amazon River Basin, representing two distinct families. The umbilical cord branched to supply a bilobed allantoic sac. Small blood vessels and smooth muscle bundles were found within the stroma of the cord. Foci of squamous metaplasia occurred in the allanto-amnion and allantochorion. The interhemal membrane of the placenta was of the epitheliochorial type. Two different types of trophoblastic epithelium were seen. Most was of the simple columnar type and indented by fetal capillaries. However, there were also areolar regions with tall columnar trophoblast and these were more sparsely supplied with capillaries. The endometrium was well vascularised and richly supplied with actively secreting glands. These findings are consistent with the current view that Cetacea are nested within Artiodactyla as sister group to the hippopotamids. © 2007 da Silva et al; licensee BioMed Central Ltd.Volume 5Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessAnimals TissueChorioallantoisControlled StudyDolphinEndometriumFetus CirculationFetus MembraneInterspecific RelationshipNonhumanPlacentaReproductionRiver BasinUmbilical Cord Blood FlowAmnionAnimalsBrasilCapillaryDolphinEndometriumEpitheliumFemaleHistologyPhylogenyPhysiologyPlacenta CirculationPregnancyUmbilical CordVascularizationArtiodactylaCetaceaHippopotamidaeInia GeoffrensisSotalia FluviatilisAllantoisAmnionAnimalBrasilCapillariesDolphinsEndometriumEpitheliumFemalePhylogenyPlacentaPlacental CirculationPregnancyUmbilical CordPlacentation in dolphins from the Amazon River Basin: The Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilisinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleReproductive Biology and Endocrinologyengreponame:Repositório Institucional do INPAinstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPAORIGINALartigo-inpa.pdfartigo-inpa.pdfapplication/pdf2622654https://repositorio.inpa.gov.br/bitstream/1/16350/1/artigo-inpa.pdfa74ca6d95561f2840934fe31826e0e83MD511/163502020-06-03 18:13:40.291oai:repositorio:1/16350Repositório de PublicaçõesPUBhttps://repositorio.inpa.gov.br/oai/requestopendoar:2020-06-03T22:13:40Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA)false |
dc.title.en.fl_str_mv |
Placentation in dolphins from the Amazon River Basin: The Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilis |
title |
Placentation in dolphins from the Amazon River Basin: The Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilis |
spellingShingle |
Placentation in dolphins from the Amazon River Basin: The Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilis Silva, Vera Maria Ferreira da Animals Tissue Chorioallantois Controlled Study Dolphin Endometrium Fetus Circulation Fetus Membrane Interspecific Relationship Nonhuman Placenta Reproduction River Basin Umbilical Cord Blood Flow Amnion Animals Brasil Capillary Dolphin Endometrium Epithelium Female Histology Phylogeny Physiology Placenta Circulation Pregnancy Umbilical Cord Vascularization Artiodactyla Cetacea Hippopotamidae Inia Geoffrensis Sotalia Fluviatilis Allantois Amnion Animal Brasil Capillaries Dolphins Endometrium Epithelium Female Phylogeny Placenta Placental Circulation Pregnancy Umbilical Cord |
title_short |
Placentation in dolphins from the Amazon River Basin: The Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilis |
title_full |
Placentation in dolphins from the Amazon River Basin: The Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilis |
title_fullStr |
Placentation in dolphins from the Amazon River Basin: The Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilis |
title_full_unstemmed |
Placentation in dolphins from the Amazon River Basin: The Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilis |
title_sort |
Placentation in dolphins from the Amazon River Basin: The Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilis |
author |
Silva, Vera Maria Ferreira da |
author_facet |
Silva, Vera Maria Ferreira da Carter, Anthony M. Ambrósio, Carlos Eduardo Carvalho, Ana Flávia de Bonatelli, Marina Lima, Marcelo Cardoso Miglino, Maria Angelica |
author_role |
author |
author2 |
Carter, Anthony M. Ambrósio, Carlos Eduardo Carvalho, Ana Flávia de Bonatelli, Marina Lima, Marcelo Cardoso Miglino, Maria Angelica |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Silva, Vera Maria Ferreira da Carter, Anthony M. Ambrósio, Carlos Eduardo Carvalho, Ana Flávia de Bonatelli, Marina Lima, Marcelo Cardoso Miglino, Maria Angelica |
dc.subject.eng.fl_str_mv |
Animals Tissue Chorioallantois Controlled Study Dolphin Endometrium Fetus Circulation Fetus Membrane Interspecific Relationship Nonhuman Placenta Reproduction River Basin Umbilical Cord Blood Flow Amnion Animals Brasil Capillary Dolphin Endometrium Epithelium Female Histology Phylogeny Physiology Placenta Circulation Pregnancy Umbilical Cord Vascularization Artiodactyla Cetacea Hippopotamidae Inia Geoffrensis Sotalia Fluviatilis Allantois Amnion Animal Brasil Capillaries Dolphins Endometrium Epithelium Female Phylogeny Placenta Placental Circulation Pregnancy Umbilical Cord |
topic |
Animals Tissue Chorioallantois Controlled Study Dolphin Endometrium Fetus Circulation Fetus Membrane Interspecific Relationship Nonhuman Placenta Reproduction River Basin Umbilical Cord Blood Flow Amnion Animals Brasil Capillary Dolphin Endometrium Epithelium Female Histology Phylogeny Physiology Placenta Circulation Pregnancy Umbilical Cord Vascularization Artiodactyla Cetacea Hippopotamidae Inia Geoffrensis Sotalia Fluviatilis Allantois Amnion Animal Brasil Capillaries Dolphins Endometrium Epithelium Female Phylogeny Placenta Placental Circulation Pregnancy Umbilical Cord |
description |
A recent reassessment of the phylogenetic affinities of cetaceans makes it timely to compare their placentation with that of the artiodactyls. We studied the placentae of two sympatric species of dolphin from the Amazon River Basin, representing two distinct families. The umbilical cord branched to supply a bilobed allantoic sac. Small blood vessels and smooth muscle bundles were found within the stroma of the cord. Foci of squamous metaplasia occurred in the allanto-amnion and allantochorion. The interhemal membrane of the placenta was of the epitheliochorial type. Two different types of trophoblastic epithelium were seen. Most was of the simple columnar type and indented by fetal capillaries. However, there were also areolar regions with tall columnar trophoblast and these were more sparsely supplied with capillaries. The endometrium was well vascularised and richly supplied with actively secreting glands. These findings are consistent with the current view that Cetacea are nested within Artiodactyla as sister group to the hippopotamids. © 2007 da Silva et al; licensee BioMed Central Ltd. |
publishDate |
2007 |
dc.date.issued.fl_str_mv |
2007 |
dc.date.accessioned.fl_str_mv |
2020-06-03T21:27:33Z |
dc.date.available.fl_str_mv |
2020-06-03T21:27:33Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://repositorio.inpa.gov.br/handle/1/16350 |
dc.identifier.doi.none.fl_str_mv |
10.1186/1477-7827-5-26 |
url |
https://repositorio.inpa.gov.br/handle/1/16350 |
identifier_str_mv |
10.1186/1477-7827-5-26 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Volume 5 |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
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openAccess |
dc.publisher.none.fl_str_mv |
Reproductive Biology and Endocrinology |
publisher.none.fl_str_mv |
Reproductive Biology and Endocrinology |
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Repositório Institucional do INPA |
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