Morphological description of the white grub Melolontha incana (Coleoptera: Scarabaeidae: Melolonthinae: Melolonthini),Microscopy Research and Technique

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Morphological description of the white grub Melolontha incana (Coleoptera: Scarabaeidae: Melolonthinae: Melolonthini)
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2020-11-24 , DOI: 10.1002/jemt.23653
Zhi-Chao Jia ₁ , Hong Fang ₁ , Lu Jiang ₁

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Melolonthinae are the largest subfamily of Scarabaeidae, considered as serious pests for their larvae attacking plant roots and tubers. The edaphic larvae are difficult to be identified because the study on larval taxonomy is far from satisfactory. In this study, multivoltine white grubs Melolontha incana (Motschulsky, 1853) were investigated using light and scanning electron microscopy, in order to provide more morphological characters for the pest identification. The white grubs are atypical for the epipharynx bearing 14 heli arranged in two rows; the mandible is furnished with a patch of minute granules; the maxilla is equipped with 18 acute stridulatory teeth arranged in line; each femur and tibiotarsus is furnished ventrally with a cluster of fossorial setae. The morphological comparisons with the other melolonthine species were provided. The adaptative relationship between the morphological feature and the multivoltine life history were briefly discussed.

中文翻译：

白蛴螬 Melolontha incana（鞘翅目：金龟子科：Melolonthinae：Melolonthini）的形态描述

Melolonthinae 是金龟子科最大的亚科，被认为是其幼虫攻击植物根部和块茎的严重害虫。由于幼虫分类学的研究还不尽如人意，土壤幼虫很难被识别。在这项研究中，multivoltine 白蛴螬Melolontha incana(Motschulsky, 1853) 使用光学和扫描电子显微镜进行了研究，以便为害虫识别提供更多的形态特征。白蛴螬不典型，上咽部有14个螺旋排列成两排；下颌骨有一小块小颗粒；上颌有18颗排列整齐的锐齿；每个股骨和胫骨的腹侧都有一簇化石刚毛。提供了与其他 melolonthine 物种的形态比较。简要讨论了形态特征与多伏特生活史的适应性关系。

更新日期：2020-11-24

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