New species of Sericini from Sri Lanka (Coleoptera, Scarabaeidae). Part II

Ranasinghe, Sasanka; Eberle, Jonas; Athukorala, Namal; Benjamin, Suresh P.; Ahrens, Dirk

doi:10.5852/ejt.2022.821.1799

Cited by 3 publications

(5 citation statements)

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“…They were positioned at the same location in each campaign for 2–3 consecutive days and operated from 6 to 11 p.m. All traps (traps A‐F) were separated by a distance of at least 100–500 m, to not influence each other. Beetles were trapped in a sampling container with preservation liquid (96% ethanol; for trap design, Figure S2; see also Ranasinghe et al, 2020; Ranasinghe, Eberle, Athukorala, et al, 2022). Specimens were preserved in 96% ethanol.…”

Section: Methodsmentioning

confidence: 99%

Local stochastics and ecoclimatic situation shape phytophagous chafer assemblage composition

Ranasinghe

Eberle

Benjamin

et al. 2023

Ecology and Evolution

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Very little is known about factors determining the assemblage structure of megadiverse polyphagous‐herbivore scarab chafers in the tropics (Coleoptera: Scarabaeidae). Here, we examined the composition of Sri Lankan chafer assemblages and investigated whether it is influenced more by the general ecoclimatic situation, macrohabitat, or indetermined stochastic biotic and abiotic factors of each locality. We also explored the influence of the latter on separate lineages and general body size. Based on dedicated field surveys conducted during the dry and wet seasons, we examined 4847 chafer individuals of 105 species sampled using multiple UV‐light traps in 11 localities covering different forest types and altitudinal zones. Assemblages were assessed for compositional similarity, species diversity, and abundance within four major eco‐spatial partitions: forest types, elevational zones, localities, and macrohabitats. Our results revealed that assemblages were shaped mainly by locality stochastics (i.e., multi‐factor ensemble of all biotic and abiotic environmental conditions at local scale), and to a minor extent by ecoclimatic conditions. Macrohabitat had little effect on the assemblage composition. This was true for the entire chafer assemblage as well as for all single lineages or different body size classes. However, in medium and large species the contrasts between localities were less pronounced, which was not the case for individual lineages of the assemblage. Contrasts of assemblage similarity between localities were much more evident than those for forest types and elevation zones. Significant correlation between species composition and geographic distance was found only for the assemblage of small‐bodied specimens. Seasonal change (dry–wet) in species composition was minor and only measurable in a few localities. The strong turnover between examined localities corroborates with the high degree of endemism in many phytophagous chafers, particularly in Sericini. Connected with their hypothetic poor habitat specificity and polyphagy, this might also explain why so many chafer crop pests in the Asian tropics are endemics.

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Section: Methodsmentioning

confidence: 99%

Local stochastics and ecoclimatic situation shape phytophagous chafer assemblage composition

Ranasinghe

Eberle

Benjamin

et al. 2023

Ecology and Evolution

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“…These beetles are polyphagous herbivorous and generally nocturnal, and represented in Sri Lanka by principally three subfamilies: Rutelinae, Melolonthinae and Dynastinae (exceptionally also by Cetoniinae). Sampling of adult beetles was carried out at 15 localities during 2019–2020 (Ranasinghe et al, 2020; Ranasinghe et al, 2022a) which included different forest types (evergreen wet lowland forest, evergreen dry lowland forest, sub‐montane forest and montane forest) and elevational zones. Beetles were captured using six UV‐light traps per locality.…”

Section: Methodsmentioning

confidence: 99%

“…Sequences were assembled, edited and aligned using Geneious R7 (version 7.1.9, Biomatters Ltd.). All data are deposited in BOLD (projects: SCOIB, PLEUBARC) and GenBank (accession numbers MW698204 – MW698469 (Sericini; Ranasinghe et al, 2022a) and OP270279 – OP270470 (other taxa; see Table S1)).…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, the match ratios for all pairs of delimitation methods were calculated analogously as explained above and compared in a similarity matrix. Subsequently, the matrix was transformed into a distance matrix and a principal coordinate analysis (PCoA) was performed in PAST v.3.25 (Hammer et al, 2001) to visualise the similarity of outcome between the different methods (Ranasinghe et al, 2022a). The same was done for species inventories resulting from individual subclade analyses and cumulated inventories from individually performed species delimitation analyses on subclades, in which entities of each subclade delimitation were taken again together for the entire assemblage, to explore whether species delimitation on subclades alone affected the overall outcome of delimitation analyses.…”

Section: Methodsmentioning

confidence: 99%

“…Sampling of adult beetles was carried out at 15 localities during 2019-2020 (Ranasinghe et al, 2020;Ranasinghe et al, 2022a) which included different forest types (evergreen wet lowland forest, evergreen dry lowland forest, sub-montane forest and montane forest) and elevational zones. Beetles were captured using six UV-light traps per locality.…”

Section: Specimen Samplingmentioning

confidence: 99%

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Contrasting results of multiple species delimitation approaches cause uncertainty in synecological studies: A case study on Sri Lankan chafers

Ranasinghe,

Thormann,

Benjamin

et al. 2023

Insect Conserv Diversity

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Biodiversity patterns are the sum of multiple overlapping species distributions. Their analysis therefore requires proper species inference. DNA‐based species delimitation has become increasingly popular for such assessments, but their robustness is often problematic due to incongruence between multiple delimitation approaches. Here, we explored how contrasting results of different species’ delimitations translate into conclusions of synecological studies, exemplified by assemblages of phytophagous scarab beetles in Sri Lanka from different elevations and forest types. Particularly, we compared estimates based on complete assemblages and on cumulated species inventories inferred from individually analysed subclades. The patterns of assemblage similarity were analysed across different spatial scales with reference to morphospecies, molecular operational taxonomic units (MOTUs) and haplotypes. Method‐related ambiguity of species (MOTUs) estimates, which also included subclade inferences, severely affected the certainty of apparent biodiversity patterns at most spatial scales. Even more contrasting patterns resulted from individual clade‐wise analyses of faunal similarity or even from cumulated species inventories from individual clade‐wise species delimitation analysis. In this case study of tropical chafer beetles, haplotypes provided only very little explanatory information, since genetically highly diverse populations widely lacked shared haplotypes. Therefore, searching proper species boundaries should be the ultimate goal of biodiversity assessments to lend an enduring meaning to biodiversity research and its sustainable application. Our study underlines the need for awareness when synecological observations from different studies are integrated, which use different species delimitation methods for their biodiversity assessment, and its potential impact on conservation management.

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On the publication year of Sericini genera and species described by Brenske in “Die Serica-Arten der Erde” (Coleoptera: Scarabaeidae: Sericinae)

AHRENS,

BEZDĚK

2024

Zootaxa

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The year of publication of Brenske’s species and genera described in his opus “Die Serica-Arten der Erde” is updated following up an overlooked delay of some of the fascicules of the Berliner Entomologische Zeitschrift, namely the volumes 42, 43, and 46. This change affects 201 species group names and 20 genus group names, many of which have been revised in the past three decades, but no change of priority of other names occurred. The spelling of Mericserica oberthueri Brenske, 1899 is corrected.

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New species of Sericini from Sri Lanka (Coleoptera, Scarabaeidae). Part II

Cited by 3 publications

References 1 publication

Local stochastics and ecoclimatic situation shape phytophagous chafer assemblage composition

Local stochastics and ecoclimatic situation shape phytophagous chafer assemblage composition

Contrasting results of multiple species delimitation approaches cause uncertainty in synecological studies: A case study on Sri Lankan chafers

On the publication year of Sericini genera and species described by Brenske in “Die Serica-Arten der Erde” (Coleoptera: Scarabaeidae: Sericinae)

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