, Volume 144, Issue 4, pp 407–415 | Cite as

First description of multivalent ring structures in eutherian mammalian meiosis: new chromosomal characterization of Cormura brevirostris (Emballonuridae, Chiroptera)

  • Ramon Everton Ferreira de Araújo
  • Cleusa Yoshiko Nagamachi
  • Marlyson Jeremias Rodrigues da Costa
  • Renata Coelho Rodrigues Noronha
  • Luís Reginaldo Ribeiro Rodrigues
  • Julio César Pieczarka


Twelve specimens of the bat Cormura brevirostris (Emballonuridae: Chiroptera) were collected from four localities in the Brazilian Amazon region and analyzed by classical and molecular cytogenetics. The diploid number and autosomal fundamental number were as previously reported (2n = 22 and FNa = 40, respectively). Fluorescence in situ hybridization using rDNA probes and silver nitrate technique demonstrated the presence of two NOR sites and the presence of internal telomeric sequences at pericentromeric regions of all chromosomes with exception of Y. Based on meiotic studies and chromosome banding we suggest that the sex chromosome pair of C. brevirostris was equivocally identified as it appears in the literature. Meiotic analysis demonstrated that at diplotene–diakinesis the cells had a ring conformation involving four chromosome pairs. This suggests the occurrence of multiple reciprocal translocations among these chromosomes, which is a very rare phenomenon in vertebrates, and has never been described in Eutheria.


Chromosomes Bat Meiotic multivalent Multiple translocations Biodiversity 



The authors thank the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and the Fundação de Amparo à Pesquisa do Pará (FAPESPA) for financial supports on projects coordinated by CY Nagamachi (Edital BIONORTE-CNPq, Proc 552032/2010-7; Edital BIONORTE-FAPESPA, ICAAF 007/2011); the FAPESPA (Edital Vale – Proc 2010/110447) and BNDES (Operacão 2.318.697.0001) on Projects coordinated by JCP. CYN (308428/2013-7) and JCP (308401/2013-1) are granted as CNPq researchers. The Biodinâmica Rio and Aotus Consultoria Ambiental for financial support for the field research; Eloíza Soares and Talita Ribas for assistance in the fieldwork; and the Escola da Floresta (SEMED/SMT) in Alter do Chão, Santarém-PA, for logistical support during the field work. Sample collections were authorized by Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio) and Secretaria de Estado de Meio Ambiente do Pará (SEMA-PA).


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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Ramon Everton Ferreira de Araújo
    • 1
    • 3
  • Cleusa Yoshiko Nagamachi
    • 1
    • 2
  • Marlyson Jeremias Rodrigues da Costa
    • 1
  • Renata Coelho Rodrigues Noronha
    • 1
    • 2
  • Luís Reginaldo Ribeiro Rodrigues
    • 4
    • 5
  • Julio César Pieczarka
    • 1
    • 2
  1. 1.Laboratório de Citogenética, Centro de Estudos Avançados da Biodiversidade, Instituto de Ciências BiológicasUFPA-BelémBairro Guamá, BelémBrazil
  2. 2.CNPq ResearcherBrasíliaBrazil
  3. 3.CAPES Doctorship Scholarship –Neuroscience and Cellular Biology - UFPABelémBrazil
  4. 4.Laboratório de Genética and Biodiversidade, Instituto de Ciências da EducaçãoUniversidade Federal do Oeste do ParáSantarémBrazil
  5. 5.PPG Recursos Naturais da Amazônia - UFOPASantarémBrazil

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