Deeper view on Patchiella reaumuri (Kaltenbach, 1843) (Hemiptera: Aphididae: Pemphiginae): General morphology and sensilla diversity.

Scanning electron microscopy (SEM) methods were used for the first time to elucidate the external morphology of Patchiella reaumuri reaumuri (Kaltenbach, 1843) (Hemiptera: Aphididae: Pemphiginae). We examined and compared the external morphology of stem mothers and alate viviparous females from the parthenogenetic generation. Analysis identified diverse sensilla types, including coleoconic, campaniform, placoid, and trichoid sensilla, occurring on the antennae, mouthparts, and legs. Beyond the sensilla previously documented in the literature, we identified for the first time in aphids chaetic-type sensilla on the legs of alate viviparous females. In addition, species identity was confirmed by DNA barcoding based on the mitochondrial cytochrome c oxidase subunit I (COI) gene, and the obtained sequence was deposited in GenBank under accession number PP535559.