Variation in hindwing size and shape of Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae)

A. Moreno; A. Viloria

doi:10.57065/shilap.338

Autores/as

A. Moreno Universidad Central de Venezuela https://orcid.org/0000-0002-7516-6115
A. Viloria Instituto Venezolano de Investigaciones Científicas https://orcid.org/0000-0002-5747-4747

DOI:

https://doi.org/10.57065/shilap.338

Palabras clave:

Lepidoptera, Plutellidae, geometric morphometrics, insect pest, taxonomy, Venezuela

Resumen

Plutella xylostella (Linnaeus, 1758) ha sido señalada como la especie de Lepidoptera con la más amplia distribución. Sin embargo, es una especie altamente polimórfica, existiendo evidencia de que lo que se conoce como P. xylostella es en realidad un complejo de especies, en este sentido, es posible que no todos los registros correspondan a esta especie. El objetivo de este trabajo fue evaluar la variabilidad en el tamaño y la forma del ala posterior de especímenes de P. xylostella colectados en Venezuela, y explorar una posible diferenciación entre grupos de individuos. Para este propósito, se utilizaron 126 especímenes pertenecientes a las colecciones entomológicas del Museo del Instituto de Zoología Agrícola Francisco Fernández Yépez (MIZA, Universidad Central de Venezuela) y el Instituto Nacional de Investigaciones Agrícolas (INIA). Los patrones de variación en el tamaño y la forma del ala fueron estudiados mediante morfometría geométrica de hitos discretos. El análisis reveló diferencias significativas en la forma del ala entre tres grupos separados por diferencias observadas en la bifurcación de la vena M. Estas diferencias pueden ser atribuidas a variación intra o interespecífica, no se cuenta con la suficiente evidencia para discernir. En Venezuela, existen tres morfotipos de P. xylostella separados con base en diferencias en el tamaño y la forma de las alas posteriores. Es importante esclarecer la identidad de estos morfotipos, combinando estos resultados con información adicional como datos moleculares y taxonomía de inmaduros.

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Citas

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