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Decoupled Patterns of Diversity and Disparity Characterize an Ecologically Specialized Lineage of Neotropical Cricetids

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Abstract

A link between morphological diversity and species richness is often implied in several evolutionary concepts, but conflicting results hamper a more direct link between these variables. Using a morphologically and ecologically diverse clade of Neotropical cricetids, Akodontini, we (1) characterized the tribe’s patterns of morphological disparity and lineage diversification, contrasting the two major clades; and (2) tested whether morphological disparity and rates of morphological evolution are associated with their lineage diversification patterns. We found no correlation between diversification rates and morphological patterns; instead, our results reveal a pattern of ecological and morphological diversification that is independent of cladogenetic events. We found higher rates of morphological evolution in lineages with longer independent evolutionary histories, leading to fewer, but more disparate and specialized species occupying the peripheral areas of the ecomorphospace and increasing the overall morphological diversity of the group.

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Acknowledgements

We thank the curators of the mammal collections who allowed access to specimens under their care (AMNH, Robert Voss; USNM, Darrin Lunde; MCNM, Claudia Costa; MN, João Oliveira). We kindly thank Fábio Machado (Oklahoma State University) for insightful discussions on geometric morphometrics and phylogenetic comparative methods during the development of this study; and Caroline Oswald (Universidade Federal de Santa Catarina) for reading a preliminary version of the manuscript. The insightful comments of the editor and two anonymous reviewers have greatly contributed to improving the final version of the manuscript.

Funding

This work was made possible with financial support of Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES—Finance Code 0001) which granted RVM with regular and sandwich fellowships (88881.133833/2016-1). We also thank Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG, APQ-02066-21) and the Grant #2022/00044-7, São Paulo Research Foundation (FAPESP), for the financial support to RVM and DMC, respectively.

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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analyses were performed by RVM and DMC. The first draft of the manuscript was written by RVM and DMC, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Rafaela V. Missagia.

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The authors declare that they have no conflict of interest.

Supplementary Information

Below is the link to the electronic supplementary material.

Supplementary file List of voucher specimens. (DOCX 44 kb)

Supplementary file Landmark illustration and definitions. (DOCX 219 kb)

Supplementary file Error associated with landmark digitalization…details… (XLSX 13 kb)

Supplementary file Results of Pearson correlation tests for size estimates. (CSV 0 kb)

11692_2022_9596_MOESM5_ESM.csv

Supplementary file Summary of raw values for disparity, size, morphological evolutionary rates, speciation and extinction rates for all taxa sampled in the present study. Variable names as in Figure 4 legend. (CSV 10 kb)

Supplementary file Clade rates AOV tables. (XLSX 12 kb)

Supplementary file Shape allometry AOV tables. (XLSX 9 kb)

Supplementary file Node disparity values for each dataset. (CSV 4 kb)

11692_2022_9596_MOESM9_ESM.xlsx

Supplementary file Posterior probabilities (PP) for the estimated number of rate shifts in BAMM diversification rates analyses and the 95% Highest Posterior Density (HPD) interval for rate shift configurations and their associated PPs. (XLSX 11 kb)

Supplementary file BAMM phylorate plots for the rate configurations within the 95% HPD interval. (PDF 59 kb)

11692_2022_9596_MOESM11_ESM.xlsx

Supplementary file Speciation and extinction rates AOV tables, for comparison of clades A and B, and comparisons of Akodon and all other akodonties. (XLSX 11 kb)

Supplementary file PGLS models AOV tables. (XLSX 47 kb)

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Missagia, R.V., Casali, D.M., Patterson, B.D. et al. Decoupled Patterns of Diversity and Disparity Characterize an Ecologically Specialized Lineage of Neotropical Cricetids. Evol Biol 50, 181–196 (2023). https://doi.org/10.1007/s11692-022-09596-8

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  • DOI: https://doi.org/10.1007/s11692-022-09596-8

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