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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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.
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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)
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)
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)
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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