Contrasting dispersal histories shape distinct evolutionary trajectories between Malesian and pantropical Talipariti (Malvaceae)

Contrasting dispersal histories shape distinct evolutionary trajectories between Malesian and pantropical Talipariti (Malvaceae) | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL Ecology and Evolution This is a preprint and has not been peer reviewed. Data may be preliminary. 12 May 2026 V1 Latest version Share on Contrasting dispersal histories shape distinct evolutionary trajectories between Malesian and pantropical Talipariti (Malvaceae) Authors : Fernando Vélez Esperilla 0009-0008-2716-6912 [email protected] , Hiroshi Noda [email protected] , Tadashi Kajita [email protected] , and Koji Takayama [email protected] Authors Info & Affiliations https://doi.org/10.22541/authorea.15003073/v1 26 views 13 downloads Contents Abstract Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract The complex tectonic history of Malesia makes it a critical region for understanding the origins of tropical biodiversity, yet the drivers of plant diversification and range expansion across this region remain poorly resolved. Talipariti (Malvaceae) provides a unique system to test those drivers across Malesia since the Miocene. We aim to test whether species distributions were shaped primarily by stochastic long-distance dispersal (LDD) or by stepping-stone dispersal associated with tectonic collisions, by comparing two Talipariti lineages with contrasting geographic ranges: a pantropical sea hibiscus group and an endemic Papuan group. We constructed a phylogenomic framework using genome-wide nuclear loci and plastome data, estimated divergence times, and applied quantitative biogeographical modelling to compare alternative dispersal scenarios, explicitly testing the contribution of founder-event speciation and time-stratified palaeogeographic information. Talipariti originated within Malesia ca. 20 Ma. A vicariance event along Lydekker's Line separated the Papuan group to the east from the remaining lineages to the west at ca. 8 Ma, and subsequently, the sea hibiscus group underwent rapid radiation from ca. 1.4 Ma. Biogeographical models reveal a pronounced dichotomy: the sea-hibiscus group is best explained by unconstrained models incorporating founder-event speciation, whereas the Papuan group is best supported by time-stratified distance-dependent models without a significant contribution of founder events. Pantropical distributions in the sea-hibiscus group arose primarily through effective LDD events, whereas the Papuan group distribution expanded via stepping-stone dispersal associated with Miocene Sunda-Sahul island connectivity. These findings demonstrate that the evolutionary fate of plant lineages is not determined by geological history alone, but by its interaction with intrinsic dispersal difference, revealing Wallace's and Lydekker's Lines as permeable filters rather than absolute barriers. Through biogeographical model comparison, this study provides a quantitative framework for understanding how geological history and dispersal process jointly shape plant diversification across Malesia. Information & Authors Information Version history V1 Version 1 12 May 2026 Collection Ecology and Evolution Authors Affiliations Fernando Vélez Esperilla 0009-0008-2716-6912 [email protected] Kyoto University, Kyoto, Japan, 606-8501 View all articles by this author Hiroshi Noda [email protected] Kyoto University, Kyoto, Japan, 606-8501 View all articles by this author Tadashi Kajita [email protected] View all articles by this author Koji Takayama [email protected] View all articles by this author Metrics & Citations Metrics Article Usage 26 views 13 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Fernando Vélez Esperilla, Hiroshi Noda, Tadashi Kajita, et al. Contrasting dispersal histories shape distinct evolutionary trajectories between Malesian and pantropical Talipariti (Malvaceae). Authorea . 12 May 2026. DOI: https://doi.org/10.22541/authorea.15003073/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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