Morphology of the female genital system of the paca (Cuniculus paca, Linnaeus, 1766)

  • Ana Carolina Gonçalves dos Reis Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP
  • Silvia Helena Brendolan Gerbasi Centro Universitário Barão de Mauá, Ribeirão Preto, SP
  • Carolina Martins Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP
  • Márcia Rita Fernandes Machado Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Departamento de Morfologia e Fisiologia Animal, Jaboticabal, SP
  • Cláudio Alvarenga de Oliveira Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
Keywords: Reproduction, Wild animal, Rodent, Anatomy

Abstract

The macroscopic morphology of genital tract of six adult female paca (Cuniculus paca) was studied through dissection of abdominal and pelvic cavities immediately after death. The ovaries have ovoid shape, dorsal-ventrally flattened, whitish yellow color with small red spots on its surface, located in sublombar situation, caudally to the kidneys, surrounded by a shallow bursa and fixed by the mesovarium; the oviduct is a pair of sinuous tubes, continuous with the ovaries, inserted in the mesosalpinx and extending up to the beginning of each correspondent uterine horn. The uterus horns are rectilinear and attached in the abdominal walls by the mesometrium, each horns extends caudally into the pelvic cavity and are linked by intercornual ligament, the ventral surface chiefly contacts the bladder; two cervices are present, although the uterine septum is incomplete, characterizing the presence of two internal uterine ostia and one external uterine ostium, considering this uterus as an incomplete duplex. The vagina is a tubular organ that is positioned ventrally to the rectum and dorsally to the urinary bladder and urethra; urethral duct is placed apart of the vaginal canal, characterizing the absence of the vestibulum; the vulva presents itself planed, with reduced vulvae lips, the clitoris is a conical structure with two prominent pointed structures at its distal region. There were no differences statistically significant in measurements made in the ovaries, oviducts and uterine horns, when comparing the right and left sides.

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Published
2011-06-01
How to Cite
Reis, A., Gerbasi, S., Martins, C., Machado, M., & Oliveira, C. (2011). Morphology of the female genital system of the paca (Cuniculus paca, Linnaeus, 1766). Brazilian Journal of Veterinary Research and Animal Science, 48(3), 183-191. https://doi.org/10.11606/S1413-95962011000300001
Section
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