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Spermatogenesis is seasonal in the large hairy armadillo, Chaetophractus villosus (Dasypodidae, Xenarthra, Mammalia).

Authors
  • Luaces, Juan P1
  • Rossi, Luis F
  • Merico, Valeria
  • Zuccotti, Maurizio
  • Redi, Carlo A
  • Solari, Alberto J
  • Merani, Maria S
  • Garagna, Silvia
  • 1 Laboratorio de Biología Cromosómica, Facultad de Medicina, UBA, Paraguay 2155 10°P Lab 6, Buenos Aires, Argentina. , (Argentina)
Type
Published Article
Journal
Reproduction, fertility, and development
Publication Date
Jan 01, 2013
Volume
25
Issue
3
Pages
547–557
Identifiers
DOI: 10.1071/RD12127
PMID: 22951275
Source
Medline
License
Unknown

Abstract

Very little is known about the distinct reproductive biology of armadillos. Very few studies have investigated armadillo spermatogenesis, with data available only for Euphractus sexcinctus and Dasypus novemcinctus. In the present study, we analysed male germ cell differentiation in the large hairy armadillo Chaetophractus villosus throughout the year, describing a cycle of the seminiferous epithelium made of eight different stages. Evaluation of the testis/body mass ratio, analysis of the architecture of the seminiferous epithelium and the frequency of defective seminiferous tubules allowed identification of a temporal interruption of spermatogenesis during the period between mid-May to July (mid-end autumn) in correlation with very low testosterone levels. Overall, these results suggest that spermatogenesis is seasonal in C. villosus.

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