Ultrastructure of the Secondary Egg Envelope of Cyprinodontidae of the Genus Epiplatys Gill, 1862 (Pisces, Teleostei)

Authors

  • Omar Thiom Thiaw,

    Corresponding author
    1. Département de Biologie Animale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, Sénégal
      Département de Biologie Animale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, Sénégal
    Search for more papers by this author
  • Xavier Mattei

    1. Université de Corse, F-20250 Corte, France
    Search for more papers by this author

Département de Biologie Animale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, Sénégal

Abstract

Abstract The structure of the secondary egg envelope of seven species of Cyprinodontidae belonging to the genus Epiplatys was observed by transmission and scanning electron microscopy. The transverse structure of the secondary envelope examined by transmission electron microscopy is a constant feature in all the species studied and represents a good criterion for identification. In contrast, the surface structure of the secondary envelope when observed by scanning electron microscopy exhibits a great diversity of form. It is possible to distinguish each of the seven different species by the pattern of ornamentation, the width of the polygons and the size of the granules comprising them on the secondary egg envelope.

Ancillary