Morphology of interommatidial sensilla of Discocephalini (Heteroptera: Pentatomidae: Discocephalinae)

IF 1.7 3区 农林科学 Q2 ENTOMOLOGY Arthropod Structure & Development Pub Date : 2023-01-01 DOI:10.1016/j.asd.2022.101216
Breno Batista Campos , André Oliveira Correia , Luiz Alexandre Campos , José Antônio Marin Fernandes
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引用次数: 1

Abstract

Interommatidial sensilla have been explored for their taxonomic value and other aspects in Diptera and Lepidoptera. In Heteroptera, Eurystethus is the only genus where these structures were examined in delimiting subgenera and species. This study investigates the presence, distribution, and morphology of interommatidial sensilla in Discocephalinae species and discusses the sensilla's value for cladistic and taxonomic appraisals. Twenty species of 18 genera were analyzed: 16 Discocephalini genera, one genus in Ochlerini, and one genus in Edessinae. Species' heads were observed from photographs taken with light microscopy (LM) and scanning electron microscopy (SEM). From these images, we identified eleven types of sensilla, classified into chaetica, trichoidea and coeloconica. In LM, only sensilla chaetica with a length of 40–100 μm were visible, present in six species. Under the SEM at least one type of sensillum was visible in 19 of the 20 species analyzed. No difference between the various kinds of sensilla were apparent between males and females or adults and nymphs of a given species. Both subgenera of Eurysthetus have the same type of sensillum (chaeticum type I), which suggests this is not a delimiting feature. We conclude that sensilla chaetica can be a valuable character to delimit groups of genera within Discocephalini.

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蝶头虫的胞间感受器形态(异翅目:蝽科:蝶头虫科)
在直翅目和鳞翅目昆虫中,目间感受器的分类价值和其他方面已经得到了探索。在异翅目中,Eurystehus是唯一一个在划分亚属和物种时对这些结构进行了检查的属。本研究调查了球头菌科物种中甲间感受器的存在、分布和形态,并讨论了该感受器在分支和分类学评估中的价值。对18属20种进行了分析:盘头蝶属16属,赭蝶属1属,雪蝶科1属。从光学显微镜(LM)和扫描电子显微镜(SEM)拍摄的照片中观察到物种的头部。从这些图像中,我们确定了11种类型的感觉器,分为毛状、毛状和共状。在LM中,只有长度为40–100μm的毛感器可见,存在于6个物种中。在扫描电镜下,在所分析的20个物种中,有19个物种可见至少一种类型的感器。不同种类的感受器在雄性和雌性、成年和若虫之间没有明显差异。Eurysthetus的两个亚属都有相同类型的感受器(毛状体I型),这表明这不是一个分界特征。我们得出的结论是,毛感器可能是盘头菌属内划分属群的一个有价值的特征。
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来源期刊
CiteScore
3.50
自引率
10.00%
发文量
54
审稿时长
60 days
期刊介绍: Arthropod Structure & Development is a Journal of Arthropod Structural Biology, Development, and Functional Morphology; it considers manuscripts that deal with micro- and neuroanatomy, development, biomechanics, organogenesis in particular under comparative and evolutionary aspects but not merely taxonomic papers. The aim of the journal is to publish papers in the areas of functional and comparative anatomy and development, with an emphasis on the role of cellular organization in organ function. The journal will also publish papers on organogenisis, embryonic and postembryonic development, and organ or tissue regeneration and repair. Manuscripts dealing with comparative and evolutionary aspects of microanatomy and development are encouraged.
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