Descripción macroscópica y microscópica del tracto reproductivo en machos de maroperipatus aff. geayi (onycophora: peripatidae)
Se estudió la morfología macroscópica e histológica del tracto reproductivo de machos de onicóforos Macroperipatus aff. geayi, y su desarrollo desde estados fetales, neonatos hasta individuos de diferentes tamaños corporales para determinar si sus características son similares y compartidas con otro...
- Autores:
-
Fonseca Garcia, Freddy
- Tipo de recurso:
- http://purl.org/coar/version/c_b1a7d7d4d402bcce
- Fecha de publicación:
- 2016
- Institución:
- Universidad Industrial de Santander
- Repositorio:
- Repositorio UIS
- Idioma:
- spa
- OAI Identifier:
- oai:noesis.uis.edu.co:20.500.14071/34266
- Palabra clave:
- Macroperipatus
Onychophora
Peripatidae
Histología
Espermatóforos.
We studied the macroscopic and histological morphology of the reproductive male tract for Macroperipatus aff. geayi and its development from fetuses through neonates to individuals of different body sizes. We also determined if there were similar or shared characteristics with other onychophorans belonging to the Peripatidae family. Additionally
the body size at which males reach the sexual maturity was elucidated. The general anatomy was similar to the one reported for other species of the Peripatidae family. Neonates and specimens with different body sizes were mature producing spermatozoa at the seminal vesicle
and reproductively active because they produce spermatophores within the vas deferens. The pigmented fetuses
near to birth and found in the descendent oviduct of females
were recognized as sexually mature but not reproductively active
since although they produce spermatozoa they did not have spermatophores in their vas deferens. The partially pigmented fetuses
also found in the descendent oviduct but in a more anterior position and in a previous developmental stage
did not have spermatozoa
however
spermiogenesis is already occurring. Consequently
the individuals of this population initiate the spermiogenesis process during their fetal development and produce spermatozoa as advanced fetuses. Males can be reproductively active from neonates
because at this stage they are capable of producing spermatophores for transferring into the female gonopore
- Rights
- License
- Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)