Structure of antennal sensilla in the caddisfly genus Rhyacophila pictet (Trichoptera, Rhyacophilidae)

Diversity and distribution patterns of antennal sensilla in Hydropsychidae (Insecta, Trichoptera)

“…Thirdly, coronary sensilla have a wide variety of distribution pattern, which usually has no similarities even in closely related species from the same subfamily. Other types of sensilla, which have non-specific or specific distribution, display the same patterns in their localization as in other studied caddisfly families (Ivanov and Melnitsky, 2011;Melnitsky and Ivanov, 2016;Melnitsky et al, 2018;Valuyskiy et al, 2017Valuyskiy et al, , 2019Valuyskiy et al, , 2020aValuyskiy et al, , 2020b.…”

“…Pseudoplacoid sensilla of different types have very variable patterns of specific distribution in Macronematinae. High diversity of pseudoplacoid sensilla distribution was also shown for Rhyacophilidae, which have a tendency for structural differentiation of these sensilla (Valuyskiy et al, 2017).…”

“…Other sensilla types also show structural modifications: long trichoid, chaetoid, coronary, and styloconic sensilla. Coronary sensilla in Arctopsychinae, D. robus ta, D. gombak and D. hermione have unevenly deve loped microtrichia as in Rhyacophilidae (Valuyskiy et al, 2017), Ecnomidae (Valuyskiy et al, 2019), Glossosomatidae (Valuyskiy et al, 2020a) and Apataniidae (Valuyskiy et al, 2020b). D. gombak has two different subtypes of styloconic sensilla, as was noted in Philopotamidae (Melnitsky et al, 2018) and Plutellidae (Lepidoptera) (Yan et al, 2017).…”

“…The distribution patterns of sensilla in these taxa have many similarities (Melnitsky et al, 2018;Valuyskiy et al, 2019). At the same time, the diversity of sen-silla is much higher in basal Integripalpia: 13 types of sensilla were found in Rhyacophilidae, mostly based on mushroom-like pseudoplacoid sensilla modifications (Valuyskiy et al, 2017). The distribution and number of sensilla show a significant variety in more advanced families of Plenitentoria, as found in the family Apataniidae (Valuyskiy et al, 2020b).…”

“…Some cuticular structures (long trichoids, scales, and microtrichia) are not innervated and do not perform sensory functions (Snodgrass, 1935). Four types of sensilla distribution can be found on caddisfly antennae: Non-specific, when sensilla cover the whole surface of the segment and are distributed more or less uniformly; specific, when sensilla occur singly or in small groups only on certain parts of each segment; fixed, the sensilla have the same position on flagellomeres; and sensory fields, in which the sensilla occur in groups in certain places of each flagellomere -these groups comprise only one type of sensilla (Valuyskiy et al, 2017). The cuticular parts of sensilla in Trichoptera and Lepidoptera display considerable similarity (Faucheux, 2004).…”