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Fine structure of the mouthparts of Diostrombus politus and Proutista moesta (Hemiptera: Derbidae)
Yin-Feng Meng,Dao-Zheng Qin 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.3
Insect mouthparts are important sensory and feeding structures, morphological studies of this organ can provide additional data for phylogenetic studies. The planthopper superfamily Fulgoroidea is among the dominant groups of phytophagous insects, however, the mouthparts ultrastructure of this superfamily remains unsatisfactorily studied. This study investigates the ultrastructure of the mouthparts of two species in the family Derbidae (Hemiptera: Fulgoroidea), Diostrombus politus Uhler and Proutista moesta (Westwood), using a scanning electron microscope. The results show that these two derbids are of a typical piercing-sucking type found in Hemiptera. They consist of a cone-shaped labrum, a three-segmented labium and a stylet fascicle with two interlocked maxillary stylets incompletely wrapped by two mandibular stylets. The arrangement of the sensilla on the labial tip differ slightly between the two derbid species, and the subapical labial sensilla are likely different among genera in the family Derbidae.
Xu Ye,Dietrich Christopher H.,Qin Dao-Zheng 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.1
Two genera, Dayus Mahmood, 1967 and Znana Dworakowska, 1994 of the leafhopper tribe Empoascini (Hem iptera: Cicadellidae: Typhlocybinae) are reviewed. One new species of each genus, Dayus furcatus sp. nov. and Znana furca sp. nov., are described from Thailand. A checklist and distribution summary of Dayus Mahmood species is given. Male habitus photos and illustrations of male genitalia of the two new species and notes on allied species are also provided.