Genetic variation of <i>Macrobrachium lanchesteri</i> (De Man, 1911) in Northeastern Thailand

Khanarnpai, Rawikarn; Thaewnon-ngiw, Bungorn; Kongim, Bungon

doi:10.1080/23312025.2019.1677126

Cited by 6 publications

(9 citation statements)

References 18 publications

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“…Recently, two newly named species, M. suphanense and M. chinatense were described from freshwater tributaries in central Thailand (Saengphan et al 2018;Saengphan et al 2019). There is also some genetic evidence of Thai Macrobrachium species exhibiting distinct geographical populations (Khanarnpai et al 2019;Saengphan et al 2018). In total, thirty-one Macrobrachium species have been reported from Thailand, including the three new species found in this study.…”

Section: Species Diversity and Distribution Of The Thai "Pilimanus" Smentioning

confidence: 58%

Peer Review #1 of "Molecular phylogeny and species delimitation of the freshwater prawn Macrobrachium pilimanus species group, with descriptions of three new species from Thailand (v0.1)"

Mazancourt¹

2020

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Specific status and species boundaries of several freshwater prawns in the Macrobrachium pilimanus species group remain ambiguous, despite the taxonomic re-description of type materials and additional specimens collected to expand the boundaries of some species. In this study, the "pilimanus" species group of Macrobrachium sensu Johnson (1958) was studied using specimens collected from montane streams of Thailand. Molecular phylogenetic analyses based on sequences of three molecular markers (COI, 16S and 18S rRNA) were performed. The phylogenetic results agreed with morphological identifications, and indicated the presence of at least nine putative taxa. Of these, six morphospecies were recognised as M. malayanum, M. forcipatum, M. dienbienphuense, M. hirsutimanus, M. eriocheirum, and M. sirindhorn. Furthermore, three morphologically and genetically distinct linages were detected, and are described herein as M. naiyanetri Siriwut sp. nov., M. palmopilosum Siriwut sp. nov. and M. puberimanus Siriwut sp. nov. The taxonomic comparison indicated wide morphological variation in several species and suggested additional diagnostic characters that are suitable for use in species diagnoses, such as the shape and orientation of fingers, the rostrum form, and the presence or absence of velvet pubescence hairs and tuberculated spinulation on each telopodite of the second pereiopods. The "pilimanus" species group was portrayed as non-monophyletic in both ML and BI analyses. The genetic structure of different geographical populations in Thailand was detected in some widespread species. The species delimitation based on the four delimitation methods (BIN, ABGD, PTP and GMYC) suggested high genetic diversity of the "pilimanus" species group and placed the candidate members much higher than in previous designations based on traditional morphology. This finding suggests that further investigation of morphological and genetic diversity of Southeast Asian freshwater prawns in the genus Macrobrachium is still required to provide a comprehensive species list to

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Section: Species Diversity and Distribution Of The Thai "Pilimanus" Smentioning

confidence: 58%

Peer Review #1 of "Molecular phylogeny and species delimitation of the freshwater prawn Macrobrachium pilimanus species group, with descriptions of three new species from Thailand (v0.1)"

Mazancourt¹

2020

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“…3 and 4, Fig 3), which are supported by both BI and ML analyses. The geographical differentiation of M. lanchesteri has been previously reported, based on karyotypes [111], microsatellite markers, traditional morphometry, and single locus phylogeny [112] The long-distance dispersal species, M. sintangense, and the recently described species, M. suphanense [70], are widely distributed in the Chao Phraya Basin, and some populations may migrate into the Mekong Basin. The phylogenetic results reveal several deeply divergent lineages, and delimitation methods cluster four new putative groups and place them between M. sintangense and M. suphanense (Fig 4).…”

Section: Cryptic Diversity and Morphological Variation Of Macrobrachium Prawns In Indochinamentioning

confidence: 86%

“…The geographical differentiation of M . lanchesteri has been previously reported, based on karyotypes [ 111 ], microsatellite markers, traditional morphometry, and single locus phylogeny [ 112 ]. In the case of rostrum form, M .…”

Section: Discussionmentioning

confidence: 99%

Evidence of cryptic diversity in freshwater Macrobrachium prawns from Indochinese riverine systems revealed by DNA barcode, species delimitation and phylogenetic approaches

et al. 2021

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The diversity of Indochinese prawns in genus Macrobrachium is enormous due to the habitat diversification and broad tributary networks of two river basins: the Chao Phraya and the Mekong. Despite long-standing interest in SE-Asian decapod diversity, the subregional Macrobrachium fauna is still not yet comprehensively clarified in terms of taxonomic identification or genetic diversification. In this study, integrative taxonomic approaches including morphological examination, DNA barcoding, and molecular species delimitation were used to emphasize the broad scale systematics of Macrobrachium prawns in Indochina. Twenty-seven nominal species were successfully re-verified by traditional and molecular taxonomy. Barcode gap analysis supported broad overlapping of species boundaries. Taxonomic ambiguity of several deposited samples in the public database is related to inter- and intraspecific genetic divergence as indicated by BOLD discordance. Diagnostic nucleotide positions were found in six Macrobrachium species. Eighteen additional putative lineages are herein assigned using the consensus of species delimitation methods. Genetic divergence indicates the possible existence of cryptic species in four morphologically complex and wide-ranging species: M. lanchesteri, M. niphanae, M. sintangense, and some members of the M. pilimanus group. The geographical distribution of some species supports the connections and barriers attributed to paleo-historical events of SE-Asian rivers and land masses. Results of this study show explicitly the importance of freshwater ecosystems in Indochinese subregions, especially for the Mekong River Basin due to its high genetic diversity and species composition found throughout its tributaries.

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“…Recently, two newly named species, M. suphanense and M. chinatense were described from freshwater tributaries in central Thailand ( Saengphan et al, 2018 ; Saengphan et al, 2019 ). There is also some genetic evidence of Thai Macrobrachium species exhibiting distinct geographical populations ( Khanarnpai, Thaewnon-ngiw & Kongim, 2019 ; Saengphan et al, 2018 ). In total, thirty-one Macrobrachium species have been reported from Thailand, including the three new species found in this study.…”

Section: Species Diversity and Distribution Of The Thai “ Pmentioning

confidence: 99%

Molecular phylogeny and species delimitation of the freshwater prawnMacrobrachium pilimanusspecies group, with descriptions of three new species from Thailand

Siriwut

Jeratthitikul

Panha

et al. 2020

PeerJ

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Specific status and species boundaries of several freshwater prawns in the Macrobrachium pilimanus species group remain ambiguous, despite the taxonomic re-description of type materials and additional specimens collected to expand the boundaries of some species. In this study, the “pilimanus” species group of Macrobrachium sensu Johnson (1958) was studied using specimens collected from montane streams of Thailand. Molecular phylogenetic analyses based on sequences of three molecular markers (COI, 16S and 18S rRNA) were performed. The phylogenetic results agreed with morphological identifications, and indicated the presence of at least nine putative taxa. Of these, six morphospecies were recognised as M. malayanum, M. forcipatum, M. dienbienphuense, M. hirsutimanus, M. eriocheirum, and M. sirindhorn. Furthermore, three morphologically and genetically distinct linages were detected, and are described herein as M. naiyanetri Siriwut sp. nov., M. palmopilosum Siriwut sp. nov. and M. puberimanus Siriwut sp. nov. The taxonomic comparison indicated wide morphological variation in several species and suggested additional diagnostic characters that are suitable for use in species diagnoses, such as the shape and orientation of fingers, the rostrum form, and the presence or absence of velvet pubescence hairs and tuberculated spinulation on each telopodite of the second pereiopods. The “pilimanus” species group was portrayed as non-monophyletic in both ML and BI analyses. The genetic structure of different geographical populations in Thailand was detected in some widespread species. The species delimitation based on the four delimitation methods (BIN, ABGD, PTP and GMYC) suggested high genetic diversity of the “pilimanus” species group and placed the candidate members much higher than in previous designations based on traditional morphology. This finding suggests that further investigation of morphological and genetic diversity of Southeast Asian freshwater prawns in the genus Macrobrachium is still required to provide a comprehensive species list to guide efforts in conservation and resource management.

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Genetic variation of Macrobrachium lanchesteri (De Man, 1911) in Northeastern Thailand

Cited by 6 publications

References 18 publications

Peer Review #1 of "Molecular phylogeny and species delimitation of the freshwater prawn Macrobrachium pilimanus species group, with descriptions of three new species from Thailand (v0.1)"

Peer Review #1 of "Molecular phylogeny and species delimitation of the freshwater prawn Macrobrachium pilimanus species group, with descriptions of three new species from Thailand (v0.1)"

Evidence of cryptic diversity in freshwater Macrobrachium prawns from Indochinese riverine systems revealed by DNA barcode, species delimitation and phylogenetic approaches

Molecular phylogeny and species delimitation of the freshwater prawnMacrobrachium pilimanusspecies group, with descriptions of three new species from Thailand

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