Testing drivers of acoustic divergence in cicadas (Cicadidae: <i>Tettigettalna</i>)

Mendes, Raquel; Nunes, Vera L.; Marabuto, Eduardo; Costa, Gonçalo J.; Silva, Sara E.; Paulo, Octávio S.; Simões, Paula C.

doi:10.1111/jeb.14133

Cited by 3 publications

References 99 publications

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Syntopic call diversity among morphologically similar calling morphs of the paleotropical katydid of genusMecopoda(Tettigoniidae) from an Indo-Burma biodiversity hotspot

Ghosh,

Dasoju,

Borgohain

et al. 2024

Preprint

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The acoustically diverse family of Tettigoniidae (Ensifera, Orthoptera) (commonly called bushcrickets or katydids), constitutes an excellent system to study the evolution of calling songs. Mecopoda is a genus that is particularly interesting because of the many morphologically cryptic calling morphs that have been described across South, East, and Southeast Asia, some of which are considered endemic to India. We describe five new syntopic and sympatric calling morphs of the genus Mecopoda that are morphologically similar but acoustically diverse from a sub-tropical forest in Meghalaya, in the Indo-Burma biodiversity hotspot. We report the morphological and acoustic characterization of these five call types, finding morphological overlap but well-separated acoustic clusters based on a PCA analysis of call temporal and spectral features. We also sequenced the COI gene mitochondrial gene of these five call types as well as other call types previously reported from India and performed a phylogenetic analysis of this gene relative to previously reported COI gene sequences from genus Mecopoda. Phylogenetic results suggest our five call types are not mutually monophyletic and relate from different subspecies of Mecopoda, of which three call types are genetically well separated from other calling morphs. This broadens our understanding of the evolution of acoustic diversity among paleotropical katydids.

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Syntopic call diversity among morphologically similar calling morphs of the paleotropical katydid of genusMecopoda(Tettigoniidae) from an Indo-Burma biodiversity hotspot

Ghosh,

Dasoju,

Borgohain

et al. 2024

Preprint

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Testing drivers of acoustic divergence in cicadas (Cicadidae: Tettigettalna)

Mendes

Nunes

Marabuto

et al. 2022

J of Evolutionary Biology

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Divergence in acoustic signals may have a crucial role in the speciation process of animals that rely on sound for intra‐specific recognition and mate attraction. The acoustic adaptation hypothesis (AAH) postulates that signals should diverge according to the physical properties of the signalling environment. To be efficient, signals should maximize transmission and decrease degradation. To test which drivers of divergence exert the most influence in a speciose group of insects, we used a phylogenetic approach to the evolution of acoustic signals in the cicada genus Tettigettalna, investigating the relationship between acoustic traits (and their mode of evolution) and body size, climate and micro‐/macro‐habitat usage. Different traits showed different evolutionary paths. While acoustic divergence was generally independent of phylogenetic history, some temporal variables’ divergence was associated with genetic drift. We found support for ecological adaptation at the temporal but not the spectral level. Temporal patterns are correlated with micro‐ and macro‐habitat usage and temperature stochasticity in ways that run against the AAH predictions, degrading signals more easily. These traits are likely to have evolved as an anti‐predator strategy in conspicuous environments and low‐density populations. Our results support a role of ecological selection, not excluding a likely role of sexual selection in the evolution of Tettigettalna calling songs, which should be further investigated in an integrative approach.

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Artrópodos endémicos de Sierra Nevada (España): actualización de su estatus

Tinaut,

Aguayo,

Pascual

et al. 2024

Supl. Bol. Asoc. esp. Ent.

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In this paper we review the 169 species or subspecies of arthropods previously considered endemic to the Sierra Nevada and update their status. To do so, we have reviewed all the existing literature on each taxon, from the original article in which it is described to any other article where its taxonomy and distribution is updated. We have also looked for information on possible endemic species or subspecies that may have been overlooked in the initial list, or that may have been described later. We considered four categories: 1) endemic, in the strict sense, those known only from the Sierra Nevada massif, 2) subendemic, occurring in one or two massifs or areas in addition to Sierra Nevada, 3) non-endemic, species that were considered endemic but live in three or more massifs or others areas, in addition to Sierra Nevada, and 4) not present, those that were erroneously cited as endemic to this massif but whose distribution does not include, either in the past or at present, Sierra Nevada. As a result, we have reviewed the status of 198 species and subspecies, of which 147 are endemic in the strict sense, 35 subendemic, 13 non-endemic and 3 not present. We also highlight the presence of 6 genera that are monospecific and exclusive to Sierra Nevada. Also, as a consequence of the extensive bibliographical revision, some of the dates of description or the names of some taxa have been modified. Finally, we highlight some species described from Sierra Nevada but which have not been found since their description, especially the case of the tettigonid Sabaterpia paulinoi (Bolívar, 1877) which we consider as possibly extinct.

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Testing drivers of acoustic divergence in cicadas (Cicadidae: Tettigettalna)

Cited by 3 publications

References 99 publications

Syntopic call diversity among morphologically similar calling morphs of the paleotropical katydid of genusMecopoda(Tettigoniidae) from an Indo-Burma biodiversity hotspot

Syntopic call diversity among morphologically similar calling morphs of the paleotropical katydid of genusMecopoda(Tettigoniidae) from an Indo-Burma biodiversity hotspot

Testing drivers of acoustic divergence in cicadas (Cicadidae: Tettigettalna)

Artrópodos endémicos de Sierra Nevada (España): actualización de su estatus

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