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Female reproductive tract of the lesser anteater (Tamandua tetradactyla, myrmecophagidae, Xenarthra). Anatomy and histology

Identifieur interne : 002710 ( Istex/Corpus ); précédent : 002709; suivant : 002711

Female reproductive tract of the lesser anteater (Tamandua tetradactyla, myrmecophagidae, Xenarthra). Anatomy and histology

Auteurs : L. F. Rossi ; J. P. Luaces ; H. J. Aldana Marcos ; P. D. Cetica ; G. Gachen ; G. Pérez Jimeno ; M. S. Merani

Source :

RBID : ISTEX:4F3E0CF210051BE848FA1D4C4819E8669488980A

English descriptors

Abstract

The morphological and histological features of the unusual reproductive tract of the female lesser anteater, Tamandua tetradactyla (Myrmecophagidae, Xenarthra), are described for the first time. The present study aimed to establish the main similarities and differences between this species and other xenarthrans. The populations of this species are declining rapidly for a number of reasons and our study is relevant to diverse programs related to its conservation. Studies were carried out on five female genital tracts of adult specimens. Ovaries were ovoid, presenting a medulla completely surrounded by the cortex, differently from that described in other xenarthans. Like in Dasypus but different from all other armadillos studied, single oocyte follicles were observed and a simple the uterus. The uterovaginal canal connects the uterus with the urogenital sinus. The simple columnar epithelium of the uterovaginal canal ends abruptly at a septum which resembles a hymen, where the transitional epithelium of the urogenital sinus appears. This ancestral feature is shared with that of other armadillos, except Tolypeutes matacus, which has a true vagina. Characteristics of the reproductive tract and sperm morphology of other Xenarthra are comparatively discussed. These observations suggest that important reproductive features are shared between the family Myrmecophagidae and the genus Dasypus, a basal group in the phylogeny of Xenarthra. J. Morphol. 2011. © 2011 Wiley‐Liss, Inc.

Url:
DOI: 10.1002/jmor.10983

Links to Exploration step

ISTEX:4F3E0CF210051BE848FA1D4C4819E8669488980A

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<affiliation>Correspondence address: Laboratorio de Biología Cromosómica, Instituto de Investigaciones en Reproducción, Universidad de Buenos Aires, Paraguay 2155 10°P Lab 6, C1121ABG, Ciudad de Buenos Aires, Argentina</affiliation>
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<dateIssued encoding="w3cdtf">2011-11</dateIssued>
<dateCaptured encoding="w3cdtf">2011-01-14</dateCaptured>
<dateValid encoding="w3cdtf">2011-04-05</dateValid>
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<abstract lang="en">The morphological and histological features of the unusual reproductive tract of the female lesser anteater, Tamandua tetradactyla (Myrmecophagidae, Xenarthra), are described for the first time. The present study aimed to establish the main similarities and differences between this species and other xenarthrans. The populations of this species are declining rapidly for a number of reasons and our study is relevant to diverse programs related to its conservation. Studies were carried out on five female genital tracts of adult specimens. Ovaries were ovoid, presenting a medulla completely surrounded by the cortex, differently from that described in other xenarthans. Like in Dasypus but different from all other armadillos studied, single oocyte follicles were observed and a simple the uterus. The uterovaginal canal connects the uterus with the urogenital sinus. The simple columnar epithelium of the uterovaginal canal ends abruptly at a septum which resembles a hymen, where the transitional epithelium of the urogenital sinus appears. This ancestral feature is shared with that of other armadillos, except Tolypeutes matacus, which has a true vagina. Characteristics of the reproductive tract and sperm morphology of other Xenarthra are comparatively discussed. These observations suggest that important reproductive features are shared between the family Myrmecophagidae and the genus Dasypus, a basal group in the phylogeny of Xenarthra. J. Morphol. 2011. © 2011 Wiley‐Liss, Inc.</abstract>
<note type="funding">ANPCyT - No. PICT 38013; </note>
<note type="funding">CONICET - No. PIP 0204; </note>
<subject lang="en">
<genre>keywords</genre>
<topic>genital tract</topic>
<topic>lesser anteater</topic>
<topic>myrmecophagidae</topic>
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<title>Journal of Morphology</title>
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<identifier type="ISSN">0362-2525</identifier>
<identifier type="eISSN">1097-4687</identifier>
<identifier type="DOI">10.1002/(ISSN)1097-4687</identifier>
<identifier type="PublisherID">JMOR</identifier>
<part>
<date>2011</date>
<detail type="volume">
<caption>vol.</caption>
<number>272</number>
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<detail type="issue">
<caption>no.</caption>
<number>11</number>
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<start>1307</start>
<end>1313</end>
<total>7</total>
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<identifier type="DOI">10.1002/jmor.10983</identifier>
<identifier type="ArticleID">JMOR10983</identifier>
<accessCondition type="use and reproduction" contentType="copyright">Copyright © 2011 Wiley‐Liss, Inc.</accessCondition>
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