3D images of Paravandellia phaneronema to show its feeding adaptations

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3D images of Paravandellia phaneronema to show its feeding adaptations

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Díaz del Basto, J. C., Mojica, J. I., & Koyro, H. W. (2018). External morphology of the fish parasite Paravandellia phaneronema (Miles 1943)(Siluriformes: Trichomycteridae), under the scanning electron microscope. Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales, 42(165), 323-329.

http://www.scielo.org.co/scielo.php?pid ... xt&tlng=en
http://dx.doi.org/10.18257/raccefyn.646
ABSTRACT

Based on the three-dimensional images of the endemic Colombian ichthyoparasite (Miles 1943) taken with a high-resolution scanning electron microscope (SEM), we described and analysed the superficial morphological structures developed as adaptations to their temporary hematophagous form of life. We centered on the emergent functional aspects of these adaptations and on the mechanisms used by these parasites of the subfamily Vandellinae to locate its host fish with precision adhering on its gills. We concluded that these parasites detect the host using their neuromasts, the mechanical receptors in their cephalic pores system and their lateral line, and not through the chemical reception of catabolic nitrogen products, as commonly suggested.
  • Key words: Magdalena basin; Vandellinae; Neuromast channel; Superficial neuromast
RESUMEN
Con base en imágenes de microscopía electrónica de barrido tridimensional (SEM) de alta resolución de (Miles 1943), especie de ictioparásito endémica de Colombia, se describieron y analizaron las estructuras morfológicas superficiales desarrolladas en su proceso evolutivo de adaptación a la forma de vida hematófaga. La atención se enfocó en los aspectos emergentes de la función de estas adaptaciones y en los mecanismos que estos parásitos de la subfamilia Vandellinae han utilizado para localizar con precisión su pez huésped y fijarse en sus branquias. Se concluyó que detectan al huésped utilizando los neuromastos, receptores mecánicos del sistema de poros cefálicos y de la línea lateral, y no a través de la recepción química de productos del nitrógeno catabólico, como se ha sugerido.
  • Palabras-clave: Cuenca del Magdalena; Vandellinae; Canal de neuromastos; Neuromastos superficiales
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