Comparative study of antennal sensilla of selected five genera of Buprestid beetles (Coleoptera: Buprestidae)

The Buprestidae antennal structure, including shape and number of antennomeres, sensilla morphology, and there number and distribution, is extensively used for the systematics and classification of the buprestid beetles. In this study, light and electron microscopy techniques were used to compare the antennal morphology of selected five genera of jewel beetles (Coleoptera: Buprestidae), including Chrysochroa Dejean, 1833; Chrysodema Laporte & Gory, 1835; Sternocera Eschscholtz, 1829; Sphenoptera Dejean, 1833; and Agrilus Curtis, 1825, to examine sensilla morphology and its diversity as well as evolutionary trends among the selected genera. Depending on their sensory organs' size, number, and location, buprestid species are frequently divided into different categories. Sensilla basiconica and sensilla chaetica displayed the most significant morphological diversity and variability among the five genera. Furthermore, it is essential to know that the multiporous grooved pegs (MGP) are found only in the genus Chrysodema. While comparing the antennal sensilla in various Buprestidae genera, we noticed some genus-specific sensilla in addition to the antennal sensilla morphology and its distribution, such as modified Type A3 sensilla in the genus Sternocera. We also discovered the evolutionary patterns exhibited by the in apical organ in each genus. The oldest genus currently being studied, Sternocera, stands out for having modified A3 sensilla, a sizeable sensory field, and other distinctive group characteristics. We concluded that the comparative analysis of antennal morphology would aid in the comprehensive systematics and phylogenetic study of Buprestidae.