Two new species of Dixonius from Vietnam and Laos with a discussion of the taxonomy of Dixonius (Squamata, Gekkonidae)
Integrated analyses using maximum likelihood (ML), Bayesian inference (BI), principal component analysis (PCA), discriminate analysis of principal components (DAPC), multiple factor analysis (MFA), and analysis of variance (ANOVA) recovered two new diagnosable species of gekkonid lizards in the genu...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Pensoft Publishers
2023-05-01
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| Series: | ZooKeys |
| Online Access: | https://zookeys.pensoft.net/article/101230/download/pdf/ |
| _version_ | 1797820357353144320 |
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| author | Vinh Quang Luu Thuong Huyen Nguyen Minh Duc Le Jesse L. Grismer Hong Bich Ha Saly Sitthivong Tuoi Thi Hoang L. Lee Grismer |
| author_facet | Vinh Quang Luu Thuong Huyen Nguyen Minh Duc Le Jesse L. Grismer Hong Bich Ha Saly Sitthivong Tuoi Thi Hoang L. Lee Grismer |
| author_sort | Vinh Quang Luu |
| collection | DOAJ |
| description | Integrated analyses using maximum likelihood (ML), Bayesian inference (BI), principal component analysis (PCA), discriminate analysis of principal components (DAPC), multiple factor analysis (MFA), and analysis of variance (ANOVA) recovered two new diagnosable species of gekkonid lizards in the genus Dixonius, one from the Central Highlands, Gia Lai Province, Vietnam and another from the Vientiane Province, Laos. Phylogenetic analyses based on the mitochondrial NADH dehydrogenase subunit 2 gene (ND2) and adjacent tRNAs showed that Dixonius gialaiensis sp. nov. is the sister species of D. minhlei from Dong Nai Province, Vietnam and is nested within a clade that also includes the sister species D. siamensis and D. somchanhae. Dixonius muangfuangensis sp. nov. is the sister species to D. lao from Khammouane Province, Laos and is embedded in a clade with D. vietnamensis, D. taoi, and undescribed species from Thailand. Multivariate (PCA, DAPC, and MFA) and univariate (ANOVA) analyses using combinations of 15 meristic (scale counts), six morphometric (measurements), and five categorical (color pattern and morphology) characters from 44 specimens encompassing all eight species of Dixonius from Vietnam and Laos clearly illustrate Dixonius gialaiensis sp. nov. and Dixonius muangfuangensis sp. nov. are statistically different and discretely diagnosable from all closely related species of Dixonius. These integrative analyses also highlight additional taxonomic issues that remain unresolved within Dixonius and the need for additional studies. The discovery of these new species further emphasizes the underappreciated herpetological diversity of the genus Dixonius and illustrates the continued need for field work in these regions. |
| first_indexed | 2024-03-13T09:37:12Z |
| format | Article |
| id | doaj.art-35ab45d3a1604881a6082c3a9f5f4a29 |
| institution | Directory Open Access Journal |
| issn | 1313-2970 |
| language | English |
| last_indexed | 2024-03-13T09:37:12Z |
| publishDate | 2023-05-01 |
| publisher | Pensoft Publishers |
| record_format | Article |
| series | ZooKeys |
| spelling | doaj.art-35ab45d3a1604881a6082c3a9f5f4a292023-05-25T08:11:03ZengPensoft PublishersZooKeys1313-29702023-05-01116314317610.3897/zookeys.1163.101230101230Two new species of Dixonius from Vietnam and Laos with a discussion of the taxonomy of Dixonius (Squamata, Gekkonidae)Vinh Quang Luu0Thuong Huyen Nguyen1Minh Duc Le2Jesse L. Grismer3Hong Bich Ha4Saly Sitthivong5Tuoi Thi Hoang6L. Lee Grismer7La Sierra UniversityVietnam National University of ForestryVietnam National UnversityLa Sierra UniversityVietnam National University of ForestryNational University of LaosVietnam National University of ForestryLa Sierra UniversityIntegrated analyses using maximum likelihood (ML), Bayesian inference (BI), principal component analysis (PCA), discriminate analysis of principal components (DAPC), multiple factor analysis (MFA), and analysis of variance (ANOVA) recovered two new diagnosable species of gekkonid lizards in the genus Dixonius, one from the Central Highlands, Gia Lai Province, Vietnam and another from the Vientiane Province, Laos. Phylogenetic analyses based on the mitochondrial NADH dehydrogenase subunit 2 gene (ND2) and adjacent tRNAs showed that Dixonius gialaiensis sp. nov. is the sister species of D. minhlei from Dong Nai Province, Vietnam and is nested within a clade that also includes the sister species D. siamensis and D. somchanhae. Dixonius muangfuangensis sp. nov. is the sister species to D. lao from Khammouane Province, Laos and is embedded in a clade with D. vietnamensis, D. taoi, and undescribed species from Thailand. Multivariate (PCA, DAPC, and MFA) and univariate (ANOVA) analyses using combinations of 15 meristic (scale counts), six morphometric (measurements), and five categorical (color pattern and morphology) characters from 44 specimens encompassing all eight species of Dixonius from Vietnam and Laos clearly illustrate Dixonius gialaiensis sp. nov. and Dixonius muangfuangensis sp. nov. are statistically different and discretely diagnosable from all closely related species of Dixonius. These integrative analyses also highlight additional taxonomic issues that remain unresolved within Dixonius and the need for additional studies. The discovery of these new species further emphasizes the underappreciated herpetological diversity of the genus Dixonius and illustrates the continued need for field work in these regions.https://zookeys.pensoft.net/article/101230/download/pdf/ |
| spellingShingle | Vinh Quang Luu Thuong Huyen Nguyen Minh Duc Le Jesse L. Grismer Hong Bich Ha Saly Sitthivong Tuoi Thi Hoang L. Lee Grismer Two new species of Dixonius from Vietnam and Laos with a discussion of the taxonomy of Dixonius (Squamata, Gekkonidae) ZooKeys |
| title | Two new species of Dixonius from Vietnam and Laos with a discussion of the taxonomy of Dixonius (Squamata, Gekkonidae) |
| title_full | Two new species of Dixonius from Vietnam and Laos with a discussion of the taxonomy of Dixonius (Squamata, Gekkonidae) |
| title_fullStr | Two new species of Dixonius from Vietnam and Laos with a discussion of the taxonomy of Dixonius (Squamata, Gekkonidae) |
| title_full_unstemmed | Two new species of Dixonius from Vietnam and Laos with a discussion of the taxonomy of Dixonius (Squamata, Gekkonidae) |
| title_short | Two new species of Dixonius from Vietnam and Laos with a discussion of the taxonomy of Dixonius (Squamata, Gekkonidae) |
| title_sort | two new species of dixonius from vietnam and laos with a discussion of the taxonomy of dixonius squamata gekkonidae |
| url | https://zookeys.pensoft.net/article/101230/download/pdf/ |
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