Stereoscopic study of the ocular sinuses of some ostracoda.

• Mervin Kontrovitz ^[1] ; Zhao Yuhong ^{[1] [2]}
  1. [1] University of Louisiana at Monroe

     University of Louisiana at Monroe

     Estados Unidos

     
  2. [2] Nanjing Institute of Geology and Paleontology

     Nanjing Institute of Geology and Paleontology

     China

     
• Localización: Revista española de micropaleontología, ISSN 0556-655X, Vol. 23, Nº. 1, 1991, págs. 27-35
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • This is the first publication using scanning electron stereographs of the ocular sinuses of ostracodes; it shows the true spatial relationships of the structures in nine well-known trachyleberid species. The ocular sinus is a channel-like feature that is situated between the ocular pit and the inner surface of the eyespot. The sinus is stalk-shaped in marine podocopids and consists of: 1) the base, which is the portion in the ocular pit; 2) the cup, the bulbous distal end; and 3) the neck, which lies between the base and the cup. The cup has a marginal rim marked by a distinct anterior lobe, one or two higher posterior lobes, and a shallow depression contained by the rim; this arrangement seems to be diagnostic of the Trachyleberididae. The stereographs further reveal that the subcentral depression may have secondary topography.