SciELO - Scientific Electronic Library Online

 
vol.78 número2Marco conceptual de Monitoreo Regional de Efectos Acumulativos: Brechas y Desafíos para la Cuenca del rio Biobío en el Centro-Sur de ChilePrimer reporte de fibroma en huemul (Hippocamelus bisulcus Molina 1782) índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • En proceso de indezaciónCitado por Google
  • No hay articulos similaresSimilares en SciELO
  • En proceso de indezaciónSimilares en Google

Compartir


Gayana (Concepción)

versión On-line ISSN 0717-6538

Resumen

VILA, IRMA  y  VELIZ, DAVID. Life cycle of a freshwater Gondwanic remnant polychaete Stratiodrilus aeglaphilus (Annelida: Eunicida: Histriobdellidae), commensal with Aegla laevis (Crustacea: Anomura). Gayana (Concepc.) [online]. 2014, vol.78, n.2, pp.120-126. ISSN 0717-6538.  http://dx.doi.org/10.4067/S0717-65382014000200005.

Within the Annelida phylum, the Histriobdellidae Family groups freshwater polychaetes sharing an ancient Gondwanic relationship; very little is known about their life histories. Here we describe the life cycle of Stratiodrilus aeglaphilus, an epibiont of the crab Aegla laevis, which inhabits rivers of central Chile. All its life stages were found associated with A. laevis. The presence of a chitinous penis and its larger size permit distinguishing males from females. The observation of larvae/embryos at different development stages allowed us determining the absence of a free-swimming larvae stage in this species; recently hatched juveniles have movements similar to those of adults. S. aeglaphilus shows direct development; different embryo development stages could be observed in the coxal base of the Aegla pereiopods, where all females migrate for oviposition. The life cycle described here is similar to the cycle of other marine organisms such as molluscs and crustaceans. These organisms have adapted to limnic systems by changing their life cycles and showing an absence of planktonic larvae that ensures higher survival in these environments.

Palabras clave : .

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons