Integrative methods reveal multiple drivers of diversification in rice paddy snakes

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: March 12, 2024

Abstract Divergence dating analyses in systematics provide a framework to develop and test biogeographic hypotheses regarding speciation. However, as molecular datasets grow from multilocus genomic, sample sizes decrease due computational burdens, the testing of fine-scale becomes difficult. In this study, we use coalescent demographic models investigate diversification poorly known rice paddy snakes Southeast Asia (Homalopsidae: Hypsiscopus ), which have conflicting dates origin based on previous studies. We modeling hypothesis that diversified 2.5 mya during Khorat Plateau uplift Thailand. Additionally, ecological niche identify potential differences space two most widely distributed species past present. Our results suggest ~ 2.4 mya, supporting may initiated snakes. also find significant differentiation shifts between , indicating environmental sustained genus after uplift. study expands history Asia, highlights how smaller can be useful developing alongside genomic datasets.

Language: Английский

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Rampant Dispersal Without Gene‐Flow: Reproductively and Geographically Isolated Lineages of the Supertramp Lizard Lamprolepis smaragdina Permeate the Lesser Sunda Archipelago

Journal of Biogeography, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

ABSTRACT Aim We investigated the biogeographical patterns of a widespread arboreal lizard found throughout Wallacea and western Pacific islands. contains longstanding oceanic currents that flow from Ocean into Indian Ocean, known as Indonesian Throughflow. Using genetic data, we aim to estimate timing sequence island colonisation in Lesser Sunda archipelago southern Wallacea, determine proportion dispersal events may have been aided by ocean currents. Levels gene are also explored context arrangement, past connectivity (ex. Pleistocene land bridges), Location Southern (Indonesia, Timor‐Leste). Taxon Emerald Tree Skink ( Lamprolepis smaragdina ). Methods estimated mitochondrial DNA phylogeny Wallacean populations identify divergent guide sample selection for genomic‐scale data collection. These genomic were used (1) phylogenetic relationships using both concatenated Maximum Likelihood, summary coalescent multispecies methods, (2) levels between lineages clustering migration analyses, (3) reconstruct their history ancestral range reconstruction analysis. Results Skinks diverged population on Peleng Island ~1.25 Ma ~1 0.4 Ma. MtDNA insufficient each find one be paraphyletic two polyphyletic. Genomic Timor is polyphyletic while all other islands recovered monophyletic. Gene minimal or absent across archipelago, even become periodically bridged. More than half over‐water occurred perpendicular against Main Conclusions Despite this species' abilities genetically isolated another, adjacent This suggests species formation complete. The inferred involved many paths would difficult complete given direction currents, indicating historical more dynamic currently understood.

Language: Английский

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A New Species Belonging to the Cyrtodactylus sadleiri Complex (Squamata: Gekkonidae) Has Been Discovered in East Java, Indonesia

Zootaxa, Journal Year: 2025, Volume and Issue: 5570(1), P. 81 - 99

Published: Jan. 15, 2025

We describe a new species of Cyrtodactylus Gray from East Java (Maospati and Mojokerto), Indonesia that belongs to the C. sadlieri complex within darmandvillei group. It is medium sized (SVL) with adult males reaching 67.2 mm females 59.0 mm, dorsal tubercles absent on brachium, present antebrachium along ventrolateral fold; 18–20 irregular tubercle rows at midbody; 26–28 paravertebral per series; 28–34 ventral scale across belly; precloacal groove 32–37 precloacofemoral pores in males; enlarged femoral scales arranged continuous abrupt transition between femorals adjacent posterior margin thigh; subequal median subcaudal not transversely enlarged. The genetically divergent other Javan congeners groupwith genetic divergences (p-distances) ranging 7.7–12.1% for mitochondrial ND2 gene.

Language: Английский

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Preliminary studies of cryptic species: Phylogenetic Relationship of Cyrtodactylus sp. from Lombok Island using the NADH Dehydrogenase Subunit 2 gene

BIO Web of Conferences, Journal Year: 2025, Volume and Issue: 163, P. 01006 - 01006

Published: Jan. 1, 2025

Genus Cyrtodactylus has high morphological diversity, which often leads to confusion in its classification. The geographical history formed from ocean islands and were not separately part of the continental shelf. This research was conducted confirm identity sp. specimen Lombok Island using ND2 gene, taken 5 different locations. Molecular analysis carried out through stages DNA extraction liver tissue NexPrepTM Cell/Tissue Mini Kit, quality testing by electrophoresis, target gene amplification Polymerase Chain Reaction method with Primers M112F M1123R. reults alignment are 600 bp, BLAST phylogenetic results confirmed that three specimens same species as C. jatnai Bali Island. Hopefully, this can help develop similar future map conservation strategies for spp.

Language: Английский

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A new gecko (Phyllodactylidae: Homonota whitii group) from the Diaguita highlands, Argentina, with an updated phylogeny for the genus

Zoologica Scripta, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Abstract The South American Transition Zone (SATZ) connects the Neotropical and Andean regions, stretching from western Venezuela to northern Chile central‐western Argentina. In Argentina, northwestern Altoandina Cuyana province includes arid semi‐arid ecosystems, particularly Diaguita District, spanning Catamarca, La Rioja San Juan. This mountainous region, including Sierra de Famatina Cordillera Frontal los Andes, hosts species adapted extreme conditions. Despite its biodiversity, region's endemicity phylogenetic uniqueness remain poorly understood, especially as these ecosystems face growing climate threats, such heatwaves. Geckos (Order Gekkota) are one of oldest lizard clades, with divergences over 150 million years ago. Particularly, genus Homonota (Phyllodactylidae) is endemic southern cone America, primarily in also found Brazil, Paraguay, Bolivia Uruguay. As part a broader investigation on geckos this advance their systematic study, we generated data two mitochondrial 12 autosomal loci across 14 species, along comprehensive morphological dataset meristic measurements scale counts. Detailed analyses were conducted within an integrative assessment framework. Consequently, describe new biogeographic district representing northernmost member H. whitii group. inhabits region known for micro‐endemism, further highlighting area important biodiversity hotspot dryland ecosystems. Additionally, provide updated molecular hypothesis genus, offering insights into evolutionary history SATZ.

Language: Английский

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Establishing species boundaries in Bornean geckos

Biology Letters, Journal Year: 2024, Volume and Issue: 20(8)

Published: Aug. 1, 2024

Species delimitation using mitochondrial DNA (mtDNA) remains an important and accessible approach for discovering delimiting species. However, species with a single locus (e.g. barcoding) is biased towards overestimating diversity. The highly diverse gecko genus Cyrtodactylus one such group where mtDNA the paradigm. In this study, we use genomic data to test putative boundaries established within three recognized of on island Borneo. We predict that multi-locus will estimate fewer than mtDNA, which could have ramifications diversity genus. aim (i) investigate correspondence between delimitations data, (ii) infer trees each target species, (iii) quantify gene flow identify migration patterns assess population connectivity. find overestimated differ nuclear data. This underscores value reassess mtDNA-based taxa lacking clear boundaries. expect number continue increasing, but, when possible, should be included inform more accurate

Language: Английский

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Lineage diversity in a Melanesian lizard radiation (Gekkonidae: Nactus) further highlights exceptional diversity and endemism in eastern Papua New Guinea

Organisms Diversity & Evolution, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 9, 2024

Abstract New Guinea and surrounding islands are home to some of the richest assemblages insular biodiversity in world. The key geological drivers species richness this region largely considered be mountain uplift development offshore archipelagos—some which have accreted onto Guinea—with role elevational gradients receiving more attention than isolation on islands. Here, we examine distribution lineage body-size diversity a radiation Melanesian lizards that is almost entirely absent from montane habitats but closely associated with islands—the geckos genus Nactus . Our data indicate eastern Guinea—centred East Papuan Composite Terrane (EPCT)—shows particularly high levels endemism also inferred source area for multiple independent colonisations elsewhere Guinea, Pacific Australia. Two lineages Australia closest relatives occurring north Guinea’s Central Cordillera, suggesting dispersal through mid-Miocene, possibly via seaways would isolated east west proto-Papuan region. Syntopic tend differ body length; however, at phylogenetic scale, trait appears conservative, small-sized large-sized clustered into separate lineages. These suggest part explained by morphological diversification enabling presence sympatric communities exist, greater extent instances extensive allopatric parapatric speciation, especially around EPCT.

Language: Английский

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The natural and human-mediated expansion of a human-commensal lizard into the fringes of Southeast Asia

BMC Ecology and Evolution, Journal Year: 2024, Volume and Issue: 24(1)

Published: Feb. 20, 2024

Abstract Background Human-commensal species often display deep ancestral genetic structure within their native range and founder-effects and/or evidence of multiple introductions admixture in newly established areas. We investigated the phylogeography Eutropis multifasciata , an abundant human-commensal scincid lizard that occurs across Southeast Asia, to determine extent its assess sources signatures human introduction outside range. sequenced over 350 samples E. for mitochondrial ND2 gene reanalyzed a previous RADseq population dataset phylogenetic framework. Results Nuclear trees are concordant show has retained high levels Asia despite being frequently moved by humans. Lineage boundaries roughly correspond several major biogeographic barriers, including Wallace’s Line Isthmus Kra. Islands at outer fringe introductions. Conclusions Most enormous is it only displays signs human-introduction or recent expansion along eastern northern There were least three events human-introductions Taiwan offshore islands, oceanic islands Indonesia similar pattern. In Myanmar Hainan, there founder-effect consistent with post-warming after last glacial maxima introduction.

Language: Английский

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Systematics and biogeography of Lesser Sunda paddy frogs (Dicroglossidae: Fejervarya)

Records of the Western Australian Museum, Journal Year: 2024, Volume and Issue: 39(1), P. 15 - 15

Published: Jan. 1, 2024

The Lesser Sunda Archipelago is one of the world's most tectonically complex regions and hosts a unique assemblage amphibian species.Paddy frogs (genus Fejervarya) occur throughout region, but systematic position distribution each constituent species remains unclear.We present set comprehensive mtDNA morphometric data on three paddy frog in Sundas: F. cancrivora, iskandari verruculosa.We clarify phylogenetic verruculosa, placing it as sister cancrivora.We also confirm that Sundas.Molecular suggests cancrivora panmictic across Java Arc, while verruculosa comprise multiple highly divergent populations within Sundas.Phylogeographic results appear to support at least two natural colonisations Fejervarya Archipelago, by whereas contemporary likely arose from humanmediated movement.Our demonstrate biogeographic complexity identify key knowledge gaps Fejervarya.

Language: Английский

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A new species of narrow-banded Cyrtodactylus (Gekkonidae) from northern New Guinea

Zootaxa, Journal Year: 2024, Volume and Issue: 5506(1), P. 79 - 92

Published: Sept. 5, 2024

We describe a new species of Cyrtodactylus from the northern lowlands and foothills mainland New Guinea. mamberamo sp. nov. is distinguished all other Melanesian except C. aaroni mimikanus by combination moderate size (max SVL <100 mm), widened subcaudals, dorsal pattern numerous narrow light bands with dark-brown anterior borders, tripartite pore arrangement in males. It differs these two most-similar details colour pattern, scalation number precloacal pores. occurs at elevations between 0–870 m above sea level (a.s.l.) across wide area spanning Mamberamo Basin nearby regions. co-occurs most one or congeners. Low alpha diversity Melanesia emphasises beta turnover as key factor underpinning richness this genus. The brings total recognised to 35, real certain be over 40 species.

Language: Английский

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