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  • Title: Differences in three instars of four carrion nitidulids (Coleoptera, Nitidulidae, Nitidula and Omosita) revealed using SEM.
    Author: Hu G, Liu C, Zhang R, Li L, Shao S, Zhang R, Gao Y, Guo Y, Yang Y, Wang Y, Tao L.
    Journal: Arthropod Struct Dev; 2024 Jan; 78():101317. PubMed ID: 38113686.
    Abstract:
    The genera Omosita and Nitidula from the family Nitidulidae, are often reported to be associated with rotten animal carcasses. However, morphological descriptions of their larval stages are limited and are usually only from the third instar larvae, which does not provide enough systematic data. In this study, the overall structure of three instar larvae from the four Nitidulidae species was compared using optical microscopy, and the resolution was not satisfactory. To compensate, a large number of structures and organs were observed by scanning electron microscopy (SEM). Results showed that the number and distribution of chaetotaxy in different parts, including the macrosetae, setae, and microtrichia, have important identification values between the genera, species, and even instars. We also discuss the possible role of microtrichia in the biology of Nitidulidae larvae. Additionally, we described the number and types of sensilla in three sensory organs, and the morphologic parameters of the head capsule and urogomphi as determined by SEM images, are provided. An identification key with application value for storage products and forensic entomology was also compiled.
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