Morphology of the nymphs of Euschistus convergens (Hemiptera: Pentatomidae)
Keywords:
Carpocorini, coloration, dorsal abdominal gland, stink bugAbstract
Nymphs of Euschistus (Mitripus) convergens (Herrich-Schaffer) (Hemiptera: Pentatomidae) are described using light and scanning electron microscopy. In the 1st instar, the integument and the lateral margins of the body are smooth, the dorsal abdominal scent glands bear a rounded peritreme with cuticular valve, and the evaporatorium surface bears pointed projections. From the 2nd to the 5th instars, the integument surface is granulated, the lateral margins of the body are serrated, the dorsal abdominal scent glands bear a spout-shaped peritreme with a cuticular valve, and the evaporatorium surface is reticulated. The overall morphology of E. convergens nymphs resembles the morphology of nymphs of other Euschistus species.
Resumen
Se describen las ninfas de Euschistus (Mitripus) convergens (Herrich-Schaffer) (Hemiptera: Pentatomidae) utilizando microscopía de luz y de electrónica de barrido. En el primer estadio, el tegumento y los márgenes laterales de su cuerpo son lisos, las glándulas odoríferas abdominales dorsales tienen un peritrema redondeado con válvula cuticular, y la superficie del evaporatorium tiene proyecciones agudas. Desde el 2 al 5 estadios, la superficie del tegumento es granulada, los márgenes laterales de su cuerpo son dentados, las glándulas odoríferas abdominales dorsales tienen un peritrema en forma de pico, con una válvula cuticular y la superficie del evaporatorium es reticulada. La morfología general de las ninfas de E. convergens asemeja a la morfología de las ninfas de otras especies de Euschistus.
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