Observation of sensilla on the larval head of rusty-spotted longhorn beetle Apriona swainsoni using scanning electron microscopy
To clarify the types,numbers,and distribution of sensilla on the larval head of rusty-spotted longhorn beetle Apriona swainsoni,field emission scanning electron microscopy was employed to ob-serve the ultrastructure of the larval head capsule,antennae,and mouthparts. The results showed that the larval head was wide and flat,measuring 4.71μm in length and 2.93μm in width,with hypognathous orientation and chewing mouthparts consisting of the labrum,mandibles,labium,maxillae,and others. A total of 12 subtypes of sensilla belonging to six groups were identified on the head of A. swainsoni:four subtypes Ⅰ-Ⅳ of sensilla chaetica (SCH),one sensillum trichodeum (ST),four subtypes Ⅰ-Ⅳ of sensilla basiconica (SB),one sensillum styloconicum (SST),one Bǒhm bristle (BB) and one sensillum campaniformium (Ca). More sensilla were observed on larval head capsule and mouthparts. Specifical-ly,the head capsule had six subtypes of sensilla across four groups:SCH-Ⅰ,SCH-Ⅱ,SCH-Ⅲ,ST,BB,and Ca. On the mouthparts,nine subtypes of sensilla within four groups were identified:SCH-Ⅰ,SCH-Ⅲ,SCH-Ⅳ,ST,SB-Ⅰ,SB-Ⅱ,SB-Ⅲ,SB-Ⅳ,and SST. Only one type of sensilla,SB-III,was found on the antennae. The widespread distribution of sensilla basiconica on the mouthparts suggests their crucial role in feeding behavior and host selection for A. swainsoni larvae.
Apriona swainsonisensillalarval headmorphological characteristicscanning electron microscopy
万方数据
维普
