2022
DOI: 10.1007/s00435-022-00565-5
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Revisiting trends in morphology of antennal sensilla in scarabaeoid beetles

Abstract: Phytophagous scarab beetles associated with angiosperms have characteristically enlarged lamellate antennae and exhibit a striking morphological variation of sensilla. In this study, we compared the morphology of antennal surface of 62 species Scarabaeoidea using SEM microscopy, particularly also in light of their evolution in association with angiosperms. We investigated the correlation of antennal sensilla morphology, i.e., their structure and distribution, with species diversity and lineage diversification … Show more

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Cited by 6 publications
(7 citation statements)
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“…To further address this topic, the taxonomic sampling needs to be extended, also to allow more robust statistical topology testing (Tables 2-4; Figure 3). The same applies to Dynastinae + Rutelinae: the monophyly of Rutelinae with respect to Dynastinae recovered by our results was often not supported in other studies (e.g., Ahrens et al, 2014;Ahrens & Vogler, 2008;Neita-Moreno et al, 2019;Šípek et al, 2016), although Guo et al (2022) + Cetoniinae + Dynastinae + Melolonthinae (Figure 1) is well characterised by placoid, round antennal sensilla (Bohacz et al, 2020;Pacheco et al, 2022) as well as by adjacent metatibial spines (Ahrens, 2006). While the monophyly of Sericinae is well supported by unique elongate, placoid antennal sensilla (Pacheco et al, 2022), Sericoidinae share in many respects a mix of ancestral and derived characters, and show highly plastic character transformations, for example in sensilla (from trichoid to scale like and placoid sensilla; Pacheco et al, 2022) or mouth parts (e.g., towards pollen feeding in Phyllotociini).…”
Section: Implications On the Classification Of Scarabaeidaesupporting
confidence: 48%
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“…To further address this topic, the taxonomic sampling needs to be extended, also to allow more robust statistical topology testing (Tables 2-4; Figure 3). The same applies to Dynastinae + Rutelinae: the monophyly of Rutelinae with respect to Dynastinae recovered by our results was often not supported in other studies (e.g., Ahrens et al, 2014;Ahrens & Vogler, 2008;Neita-Moreno et al, 2019;Šípek et al, 2016), although Guo et al (2022) + Cetoniinae + Dynastinae + Melolonthinae (Figure 1) is well characterised by placoid, round antennal sensilla (Bohacz et al, 2020;Pacheco et al, 2022) as well as by adjacent metatibial spines (Ahrens, 2006). While the monophyly of Sericinae is well supported by unique elongate, placoid antennal sensilla (Pacheco et al, 2022), Sericoidinae share in many respects a mix of ancestral and derived characters, and show highly plastic character transformations, for example in sensilla (from trichoid to scale like and placoid sensilla; Pacheco et al, 2022) or mouth parts (e.g., towards pollen feeding in Phyllotociini).…”
Section: Implications On the Classification Of Scarabaeidaesupporting
confidence: 48%
“…Accessory glands are known to have an important function in the transmission of endosymbiont bacteria (see above) that are known, beyond their active part in cellulose digestion (Martin, 1983; Martin et al, 1991), to assist the production of pheromones (Hoyt et al, 1971). The latter could have had an important impact on the improvement of chemical communication in these groups (Pacheco et al, 2022). It should be noted that accessory glands are absent in Scarabaeinae, but other mechanisms for transmission of endosymbiotic bacteria have been documented (Estes et al, 2013).…”
Section: Discussionmentioning
confidence: 99%
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“…The two subgroups of Scarabaeidae, Aphodiinae + Scarabaeinae and Pleurosticti were always strongly supported as being monophyletic, as were the two subfamilies, Aphodiinae and Scarabeinae. Within Pleurosticti, Orphnus (Orphninae) was consistently found as sister group of the remaining pleurostict scarabaeid lineages, that were divided into two major clades: the first clade comprised 1) Sericoidinae — Australasian and Neotropical taxa referred to by some authors as Southern World Melolonthinae (Ahrens & Vogler 2008; Ahrens et al 2011, 2014; Šípek et al 2016) or Liparetrinae (Lacroix 2007, 2014; Eberle et al 2019; Pacheco et al 2022) — and 2) Ablaberini + Sericini + the Australian genus Diphucephala (i.e., Diphucephalini), which represented the sister group of the two former tribes. The second clade comprised Pachypus (Pachypodini) and three major lineages, which Pachypus was found to be sister group of.…”
Section: Resultsmentioning
confidence: 99%
“…Accessory glands are known to have an important function in the transmission of endosymbiont bacteria that are known, beyond their active part in cellulose digestion (Martin 1983; Martin et al 1991), to assist the production of pheromones (Hoyt et al 1971). The latter could have had an important impact on the improvement of chemical communication in these groups (Pacheco et al 2022). It should be noted that accessory glands are absent in Scarabaeinae, but other mechanisms for transmission of endosymbiotic bacteria have been documented (Estes et al 2013).…”
Section: Discussionmentioning
confidence: 99%