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Phung TM, Pham CT, Nguyen TQ, Ninh HT, Nguyen HQ, Bernardes M, Le ST, Ziegler T, Nguyen TT. Southbound - the southernmost record of Tylototriton (Amphibia, Caudata, Salamandridae) from the Central Highlands of Vietnam represents a new species. Zookeys 2023; 1168:193-218. [PMID: 38328626 PMCID: PMC10848839 DOI: 10.3897/zookeys.1168.96091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 05/29/2023] [Indexed: 02/09/2024] Open
Abstract
A new species of the genus Tylototriton is described from Ngoc Linh Mountain, Kon Tum Province, in the Central Highlands of Vietnam based on integrative taxonomy, namely by combining molecular and morphological evidence. Tylototritonngoclinhensissp. nov. differs from all other congeners based on morphological data, allopatric distribution, and molecular divergence. In terms of genetic divergence, Tylototritonngoclinhensissp. nov. distinctly differs from the sister species T.panhai (6.77%) and from T.ngarsuensis (12.36%) based on the mitochondrial NADH dehydrogenase subunit 2 (ND2) gene. Tylototritonngoclinhensissp. nov. is a moderate sized and robust salamander species with large cephalic edges, parotoids, and vertebral ridge orange in coloration. The new taxon differs from its congeners by a combination of the following morphological characteristics: size medium (SVL 60.8-66.5 mm, TL 57.6-61.8 mm in males, and SVL 72.5-75.6 mm, TL 62.9-67.9 mm in females); head longer than wide; parotoids very prominent and enlarged, projecting backwards; tail length shorter than snout-vent length; vertebral ridge large, high and glandular in appearance; 14 large and distinct dorsolateral glandular warts; gular fold present; tips of fore and hind limbs overlapping when adpressed along the body; tips of fingers reaching between eye and nostril when foreleg is laid forward; dorsal surface and lateral sides of the head, upper and lower lips, dorsolateral glandular warts, vertebral ridge, the peripheral area of the cloaca and the ventral edge of the tail orange in coloration; the presence of a distinct black line extending from the posterior end of the eye towards the shoulder. Tylototritonngoclinhensissp. nov. is restricted to evergreen montane forests near water bodies on Ngoc Linh Mountain. We suggest that the new species should be classified as Endangered (EN) in the IUCN Red List. This new important discovery represents the eighth Tylototriton taxon described from Vietnam, and at the same time constitutes the southernmost distributional record for the whole genus in Asia.
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Affiliation(s)
- Trung My Phung
- Dong Khoi 9A, Tam Hiep, Bien Hoa, Dong Nai Province, VietnamUnaffiliatedBien HoaVietnam
| | - Cuong The Pham
- Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Hanoi 10072, VietnamInstitute of Ecology and Biological Resources, Vietnam Academy of Science and TechnologyHanoiVietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi 10072, VietnamGraduate University of Science and TechnologyHanoiVietnam
| | - Truong Quang Nguyen
- Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Hanoi 10072, VietnamInstitute of Ecology and Biological Resources, Vietnam Academy of Science and TechnologyHanoiVietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi 10072, VietnamGraduate University of Science and TechnologyHanoiVietnam
| | - Hoa Thi Ninh
- Institute of Genome Research, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Hanoi 10072, VietnamInstitute of Genome Research, Vietnam Academy of Science and TechnologyHanoiVietnam
| | - Huy Quoc Nguyen
- Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Hanoi 10072, VietnamVietnam National Museum of Nature, Vietnam Academy of Science and TechnologyHanoiVietnam
| | - Marta Bernardes
- Cologne Zoo, Riehler Str. 173, D–50735 Cologne, GermanyCologne ZooCologneGermany
- Institute of Zoology, University of Cologne, Zülpicher Str. 47b, D–50674 Cologne, GermanyUniversity of CologneCologneGermany
| | - Son Thanh Le
- National Institute of Medicinal Materials, 43 Đinh Tien Hoang, Ben Nghe, Ho Chi Minh city, VietnamNational Institute of Medicinal MaterialsHo Chi Minh CityVietnam
| | - Thomas Ziegler
- Cologne Zoo, Riehler Str. 173, D–50735 Cologne, GermanyCologne ZooCologneGermany
- Institute of Zoology, University of Cologne, Zülpicher Str. 47b, D–50674 Cologne, GermanyUniversity of CologneCologneGermany
| | - Tao Thien Nguyen
- Institute of Genome Research, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Hanoi 10072, VietnamInstitute of Genome Research, Vietnam Academy of Science and TechnologyHanoiVietnam
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2
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Characterization, Comparison of Two New Mitogenomes of Crocodile Newts Tylototriton (Caudata: Salamandridae), and Phylogenetic Implications. Genes (Basel) 2022; 13:genes13101878. [PMID: 36292763 PMCID: PMC9601590 DOI: 10.3390/genes13101878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 10/12/2022] [Accepted: 10/14/2022] [Indexed: 11/17/2022] Open
Abstract
Mitochondrial genomes (mitogenomes) are valuable resources in molecular and evolutionary studies, such as phylogeny and population genetics. The complete mitogenomes of two crocodile newts, Tylototriton broadoridgus and Tylototriton gaowangjienensis, were sequenced, assembled, and annotated for the first time using next-generation sequencing. The complete mitogenomes of T. broadoridgus and T. gaowangjienensis were 16,265 bp and 16,259 bp in lengths, which both composed of 13 protein-coding genes (PCGs), 2 rRNA genes, 22 tRNA genes, and 1 control region. The two mitogenomes had high A + T content with positive AT-skew and negative GC-skew patterns. The ratio of non-synonymous and synonymous substitutions showed that, relatively, the ATP8 gene evolved the fastest and COI evolved the slowest among the 13 PCGs. Phylogenetic trees from BI and ML analyses resulted in identical topologies, where the Tylototriton split into two groups corresponding to two subgenera. Both T. broadoridgus and T. gaowangjienensis sequenced here belonged to the subgenus Yaotriton, and these two species shared a tentative sister group relationship. The two mitogenomes reported in this study provided valuable data for future molecular and evolutionary studies of the genus Tylotoriton and other salamanders.
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3
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OUP accepted manuscript. Zool J Linn Soc 2022. [DOI: 10.1093/zoolinnean/zlac038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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4
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Pomchote P, Peerachidacho P, Hernandez A, Sapewisut P, Khonsue W, Thammachoti P, Nishikawa K. A new species of the genus Tylototriton (Urodela, Salamandridae) from western Thailand. Zookeys 2021; 1072:83-105. [PMID: 34899008 PMCID: PMC8626410 DOI: 10.3897/zookeys.1072.75320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 11/01/2021] [Indexed: 11/21/2022] Open
Abstract
We describe a new species of the newt genus Tylototriton from Umphang Wildlife Sanctuary, Tak Province, western Thailand based on molecular and morphological evidence and named here as Tylototritonumphangensissp. nov. The new species is assigned to the subgenus Tylototriton and differs from other species in having dark-brown to blackish-brown body and limbs, truncate snout, prominent antero-medial ends of the expansion of the dentary bones, laterally protruding quadrate regions, indistinct and small rib nodules, a well-segmented vertebral ridge, and rough dorsolateral bony ridges, which are steeper anterior, and curved medially at the posterior ends. The molecular data show that Tylototritonumphangensissp. nov. differs from T.uyenoi sensu stricto by a 5% genetic sequence divergence of the mitochondrial NADH dehydrogenase subunit 2 region gene. The new species and T.uyenoi are both endemic to Thailand, distributed along the Northwest Thai (Dawna) Uplands of Indochina. To clarify the species boundary between Tylototritonumphangensissp. nov. and T.uyenoi, additional field research is needed in adjacent areas. Tylototritonumphangensissp. nov. is restricted to evergreen hill forests in Umphang Wildlife Sanctuary. We suggest that the new species should be classified as Endangered (EN) in the IUCN Red List.
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Affiliation(s)
- Porrawee Pomchote
- Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Parada Peerachidacho
- Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Axel Hernandez
- Department of Environmental Sciences, Faculty of Sciences and Technics, University Pasquale Paoli of Corsica, Corte 20250, France.,Laboratory for Amphibian Systematic and Evolutionary Research, College of Biology and Environment, Nanjing Forestry University, Nanjing 210000, China
| | - Pitak Sapewisut
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Wichase Khonsue
- Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Panupong Thammachoti
- Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kanto Nishikawa
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto 606-8501, Japan.,Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
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Lyu ZT, Wang J, Zeng ZC, Zhou JJ, Qi S, Wan H, Li YY, Wang YY. A new species of the genus Tylototriton (Caudata, Salamandridae) from Guangdong, southern China, with discussion on the subgenera and species groups within the genus. VERTEBRATE ZOOLOGY 2021. [DOI: 10.3897/vz.71.e73563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In this work, a new species of the genus Tylototriton is described from Guangdong, southern China. Tylototriton sini sp. nov. was recorded as T. asperrimus for decades, and was indicated to represent an independent lineage based on recent molecular phylogenetic analyses. After detailed molecular analysis and morphological comparisons, Tylototriton sini sp. nov. is recognized as a distinct species which can be clearly distinguished from all known congeners by a combination of morphological characteristics and the significant divergence in the mitochondrial gene. Because the genus Tylototriton is of high conservation concern and all formally described members are protected by law, we also provide first data on the conservation status and recommendations for IUCN categorization for Tylototriton sini sp. nov. A suggestion on the species groups division of the genus Tylototriton is also provided based on their morphological differences and phylogenetic relationships.
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Osathanunkul M, Minamoto T. eDNA‐based detection of a vulnerable crocodile newt (
Tylototriton uyenoi
) to influence government policy and raise public awareness. DIVERS DISTRIB 2021. [DOI: 10.1111/ddi.13236] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Affiliation(s)
- Maslin Osathanunkul
- Department of Biology Faculty of Science Chiang Mai University Chiang MaiThailand
- Research Center in Bioresources for Agriculture, Industry and Medicine Chiang Mai University Chiang MaiThailand
| | - Toshifumi Minamoto
- Graduate School of Human Development and Environment Kobe University Hyogo Japan
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7
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Bernardes M, Le MD, Nguyen TQ, Pham CT, Pham AV, Nguyen TT, Rödder D, Bonkowski M, Ziegler T. Integrative taxonomy reveals three new taxa within the Tylototriton asperrimus complex (Caudata, Salamandridae) from Vietnam. Zookeys 2020; 935:121-164. [PMID: 32508505 PMCID: PMC7256073 DOI: 10.3897/zookeys.935.37138] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 02/28/2020] [Indexed: 11/12/2022] Open
Abstract
The Tylototritonasperrimus complex from northern Vietnam is reviewed based on morphological comparisons and analysis of the mitochondrial marker NADH dehydrogenase subunit 2 (ND2). Based on molecular divergences, which were revealed to be higher than in other congeners, in concert with morphological differences, two new species and one subspecies are described herein: Tylototritonpasmansisp. nov. differs from T.asperrimussensu stricto by 3.2 to 3.6 % genetic divergence and a combination of distinct morphological characters, such as head slightly longer than wide, distinct mid-dorsal ridge, relatively wide distance between the eyes, tips of fingers reaching the eye when foreleg is laid forward, labial and gular folds present, central belly skin with tubercles shaped like transverse wrinkles and distinct, pointy to round rib nodules. The population of T.pasmansisp. nov. consists of two subclades, the nominotypic one occurring on the eastern side of the Da River (or Black River, including Hoa Binh and Phu Tho provinces), and another occurring on the western side (including Son La and Thanh Hoa provinces). These two subclades differ by 2.5 to 3.1 % genetic divergence and distinct morphological characters. The western subclade is herein described as Tylototritonpasmansiobstissp. nov., which differs from the nominotypic form by a wider head, longer and narrower snout, shorter femur length, and an overall less granulose skin, without an increased concentration of warts on the body sides. A second new species, Tylototritonsparreboomisp. nov. is described from Lai Chau Province. It differs from T.asperrimussensu stricto by 4.1 to 4.2 % and from Tylototritonpasmansisp. nov. by 3.6 to 4.5 % genetic divergences as well as by a combination of distinct morphological characters, such as head longer than wide, tips of fingers reaching nostril when foreleg adpressed along head, rib nodules distinct, round and relatively enlarged, and wide distance between the eyes.
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Affiliation(s)
- Marta Bernardes
- Cologne Zoo, Riehler Str. 173, 50735 Cologne, Germany Cologne Zoo Cologne Germany.,Terrestrial Ecology, Institute of Zoology, University of Cologne, Zülpicher Str. 47b, 50674 Cologne, Germany University of Cologne Cologne Germany
| | - Minh Duc Le
- Faculty of Environmental Sciences, University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai Road, Hanoi, Vietnam University of Science Hanoi Vietnam.,Central Institute for Natural Resources and Environmental Studies, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam Vietnam National University Hanoi Vietnam.,Department of Herpetology, American Museum of Natural History, Central Park West at 79th Street, New York, New York 10024, USA American Museum of Natural History New York United States of America
| | - Truong Quang Nguyen
- Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam Graduate University of Science and Technology Hanoi Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam Vietnam Academy of Science and Technology Hanoi Vietnam
| | - Cuong The Pham
- Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam Graduate University of Science and Technology Hanoi Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam Vietnam Academy of Science and Technology Hanoi Vietnam
| | - Anh Van Pham
- Faculty of Natural Science and Technology, Tay Bac University, Quyet Tam Ward, Son La City, Son La Province, Vietnam Tay Bac University Son La City Vietnam
| | - Tao Thien Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam Vietnam Academy of Science and Technology Hanoi Vietnam.,Vietnam National Museum of Nature, 18 Hoang Quoc Viet St., Hanoi, Vietnam Vietnam National Museum of Nature Hanoi Vietnam
| | - Dennis Rödder
- Zoologisches Forschungsmuseum Alexander Koenig, Adenauerallee 160, 53113 Bonn, Germany Zoologisches Forschungsmuseum Alexander Koenig Bonn Germany
| | - Michael Bonkowski
- Terrestrial Ecology, Institute of Zoology, University of Cologne, Zülpicher Str. 47b, 50674 Cologne, Germany University of Cologne Cologne Germany
| | - Thomas Ziegler
- Cologne Zoo, Riehler Str. 173, 50735 Cologne, Germany Cologne Zoo Cologne Germany.,Terrestrial Ecology, Institute of Zoology, University of Cologne, Zülpicher Str. 47b, 50674 Cologne, Germany University of Cologne Cologne Germany
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8
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Pogoda P, Zuber M, Baumbach T, Schoch RR, Kupfer A. Cranial shape evolution of extant and fossil crocodile newts and its relation to reproduction and ecology. J Anat 2020; 237:285-300. [PMID: 32297321 PMCID: PMC7369190 DOI: 10.1111/joa.13201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/19/2020] [Accepted: 03/19/2020] [Indexed: 01/22/2023] Open
Abstract
The diversity of the vertebrate cranial shape of phylogenetically related taxa allows conclusions on ecology and life history. As pleurodeline newts (the genera Echinotriton, Pleurodeles and Tylototriton) have polymorphic reproductive modes, they are highly suitable for following cranial shape evolution in relation to reproduction and environment. We investigated interspecific differences externally and differences in the cranial shape of pleurodeline newts via two‐dimensional geometric morphometrics. Our analyses also included the closely related but extinct genus Chelotriton to better follow the evolutionary history of cranial shape. Pleurodeles was morphologically distinct in relation to other phylogenetically basal salamanders. The subgenera within Tylototriton (Tylototriton and Yaotriton) were well separated in morphospace, whereas Echinotriton resembled the subgenus Yaotriton more than Tylototriton. Oviposition site choice correlated with phylogeny and morphology. Only the mating mode, with a random distribution along the phylogenetic tree, separated crocodile newts into two morphologically distinct groups. Extinct Chelotriton likely represented several species and were morphologically and ecologically more similar to Echinotriton and Yaotriton than to Tylototriton subgenera. Our data also provide the first comprehensive morphological support for the molecular phylogeny of pleurodeline newts.
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Affiliation(s)
- Peter Pogoda
- Department of Zoology, State Museum of Natural History Stuttgart, Stuttgart, Germany.,Comparative Zoology, Institute of Evolution and Ecology, Eberhard Karls University Tuebingen, Tuebingen, Germany
| | - Marcus Zuber
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany.,Laboratory for Applications of Synchrotron Radiation (LAS), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Tilo Baumbach
- Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany.,Laboratory for Applications of Synchrotron Radiation (LAS), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Rainer R Schoch
- Department of Paleontology, State Museum of Natural History Stuttgart, Stuttgart, Germany
| | - Alexander Kupfer
- Department of Zoology, State Museum of Natural History Stuttgart, Stuttgart, Germany.,Institute of Zoology, University of Hohenheim, Stuttgart, Germany
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9
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Yodthong S, Stuart BL, Aowphol A. Species delimitation of crab-eating frogs ( Fejervarya cancrivora complex) clarifies taxonomy and geographic distributions in mainland Southeast Asia. Zookeys 2019; 883:119-153. [PMID: 31719776 PMCID: PMC6828825 DOI: 10.3897/zookeys.883.37544] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 09/21/2019] [Indexed: 12/02/2022] Open
Abstract
The taxonomy and geographic distributions of species of crab-eating frogs (Fejervaryacancrivora complex) in mainland Southeast Asia have been highly uncertain. Three taxonomic names are used in recent literature (F.cancrivora, F.raja, and F.moodiei) but the applications of these names to localities has been inconsistent, especially owing to the lack of available molecular data for F.raja. Morphometric and mitochondrial DNA variation was examined in these frogs, including name-bearing types and topotypes of all three species. Findings corroborate evidence for the existence of two species in coastal mainland Southeast Asia, with F.moodiei having a wide geographic distribution and F.cancrivora sensu stricto occurring only in extreme southern Thailand and peninsular Malaysia. Fejervaryaraja is shown to be only a large-bodied population of F.cancrivora sensu stricto and is synonymized with that species. Revised descriptions of F.moodiei and F.cancrivora sensu stricto are provided.
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Affiliation(s)
- Siriporn Yodthong
- Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, Thailand Kasetsart University Bangkok Thailand
| | - Bryan L Stuart
- Section of Research & Collections, North Carolina Museum of Natural Sciences, Raleigh, NC, USA North Carolina Museum of Natural Sciences Raleigh United States of America
| | - Anchalee Aowphol
- Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, Thailand Kasetsart University Bangkok Thailand
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10
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Grismer LL, Wood PL, Quah ES, Thura MK, Espinoza RE, Murdoch ML. A new species of crocodile newt Tylototriton (Caudata: Salamandridae) from northern Myanmar (Burma). J NAT HIST 2019. [DOI: 10.1080/00222933.2019.1587534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- L. Lee Grismer
- Herpetology Laboratory, Department of Biology, La Sierra University, Riverside, CA, USA
| | - Perry L. Wood
- Department of Biological Sciences & Museum of Natural History, Auburn University, Auburn, AL, USA
| | - Evan S.H. Quah
- School of Biological Sciences, Universiti Sains Malaysia, Minden, Malaysia
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11
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Zaw T, Lay P, Pawangkhanant P, Gorin VA, Poyarkov NA. A new species of Crocodile Newt, genus Tylototriton (Amphibia, Caudata, Salamandridae) from the mountains of Kachin State, northern Myanmar. Zool Res 2019; 40:151-174. [PMID: 31011130 PMCID: PMC6591163 DOI: 10.24272/j.issn.2095-8137.2019.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
We describe a new species of the genus Tylototriton from Ingyin Taung Mt., Mohnyin Township, Kachin State, Myanmar, based on morphological and molecular evidence. The new species is assigned to the subgenus Tylototriton s. str. and is clearly distinct from all known congeners by the following characters: medium body size; thin, long tail, lacking lateral grooves; rough skin; truncate snout; wide, protruding supratemporal bony ridges on head, beginning at anterior corner of orbit; weak, almost indistinct sagittal ridge; long, thin limbs, broadly overlapping when adpressed along body; distinct, wide, non-segmented vertebral ridge; 13 or 14 rib nodules; brown to dark-brown background coloration with dull orange-brown to yellowish-brown markings on labial regions, parotoids, rib nodules, whole limbs, vent, and ventral tail ridge. We also briefly discuss biogeography and species diversity of the genus Tylototriton in Myanmar.
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Affiliation(s)
- Than Zaw
- Zoology Department, Mohnyin Degree College, Mohnyin, Kachin State, Myanmar
| | - Paw Lay
- Flora and Fauna International, Lon Ton Village, Indawgyi, Kachin State, Myanmar
| | - Parinya Pawangkhanant
- IBansomdejchaopraya Rajabhat University, Hiran Ruchi, Thon Buri, Bangkok 10600, Thailand
| | - Vladislav A Gorin
- Department of Vertebrate Zoology, Biological Faculty, Lomonosov Moscow State University, Moscow 119234, Russia
| | - Nikolay A Poyarkov
- Department of Vertebrate Zoology, Biological Faculty, Lomonosov Moscow State University, Moscow 119234, Russia.,Joint Russian-Vietnamese Tropical Research and Technological Center, Nghia Do, Cau Giay, Hanoi, Vietnam
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12
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Hernandez A, Escoriza D, Hou M. Patterns of niche diversification in south-east Asian crocodile newts. ZOOL ANZ 2018. [DOI: 10.1016/j.jcz.2018.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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13
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Wang B, Nishikawa K, Matsui M, Nguyen TQ, Xie F, Li C, Khatiwada JR, Zhang B, Gong D, Mo Y, Wei G, Chen X, Shen Y, Yang D, Xiong R, Jiang J. Phylogenetic surveys on the newt genus Tylototriton sensu lato (Salamandridae, Caudata) reveal cryptic diversity and novel diversification promoted by historical climatic shifts. PeerJ 2018; 6:e4384. [PMID: 29576937 PMCID: PMC5853667 DOI: 10.7717/peerj.4384] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 01/29/2018] [Indexed: 11/20/2022] Open
Abstract
Global climatic transitions and Tibetan Plateau uplifts are hypothesized to have profoundly impacted biodiversity in southeastern Asia. To further test the hypotheses related to the impacts of these incidents, we investigated the diversification patterns of the newt genus Tylototriton sensu lato, distributed across the mountain ranges of southeastern Asia. Gene-tree and species-tree analyses of two mitochondrial genes and two nuclear genes revealed five major clades in the genus, and suggested several cryptic species. Dating estimates suggested that the genus originated in the early-to-middle Miocene. Under different species delimitating scenarios, diversification analyses with birth-death likelihood tests indicated that the genus held a higher diversification rate in the late Miocene-to-Pliocene era than that in the Pleistocene. Ancestral area reconstructions indicated that the genus originated from the northern Indochina Peninsula. Accordingly, we hypothesized that the Miocene Climatic Transition triggered the diversification of the genus, and the reinforcement of East Asian monsoons associated with the stepwise uplifts of the Tibetan Plateau promoted the radiation of the genus in southeastern Asia during the Miocene-to-Pliocene period. Quaternary glacial cycles likely had limited effects on speciation events in the genus, but mainly had contributions on their intraspecific differentiations.
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Affiliation(s)
- Bin Wang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan, China
| | - Kanto Nishikawa
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | - Masafumi Matsui
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | - Truong Quang Nguyen
- Institute of Ecology and Biological Resources, Hanoi, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Feng Xie
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan, China
| | - Cheng Li
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan, China
| | - Janak Raj Khatiwada
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan, China
| | - Baowei Zhang
- College of Life Science, Anhui University, Hefei, China
| | - Dajie Gong
- College of Life Science, Northwest Normal University, Lanzhou, China
| | - Yunming Mo
- Natural History Museum of Guangxi, Nanning, China
| | - Gang Wei
- Biodiversity Conservation Key Laboratory, Guiyang College, Guiyang, China
| | - Xiaohong Chen
- College of Life Science, Henan Normal University, Xinxiang, China
| | - Youhui Shen
- College of Life Science, Hunan Normal University, Changsha, China
| | - Daode Yang
- Institute of Wildlife Conservation, Central South University of Forestry & Technology, Changsha, China
| | - Rongchuan Xiong
- Department of Life Science, Liupanshui Normal University, Liupanshui, China
| | - Jianping Jiang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan, China
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