Ying Zhu, JiaJie Huang, R. Sluys, Yi Liu, Ting Sun, AN-TAI Wang, Yu Zhang
A new species of freshwater flatworm of the genus Dugesia from Guangdong Province in China is described through an integrative approach, including molecular and morphological data, as well as mitochondrial genome analysis. The new species, Dugesia ancoraria Zhu & Wang, sp. nov., is characterised by: (a) a highly asymmetrical penis papilla, provided with a hunchback-like dorsal bump; (b) a short duct between seminal vesicle and ejaculatory duct; and (c) a postero-ventral course of the ejaculatory duct, which opens to the exterior at the subterminal, ventral part of the penis papilla. The molecular phylogenetic tree obtained from the concatenated dataset of four DNA markers (18S rDNA, ITS-1, 28S rDNA, COI) facilitated determination of the phylogenetic position of the new species, which shares a sister-group relationship with a small clade, comprising D. notogaea Sluys & Kawakatsu, 1998 from Australia and D. bengalensis Kawakatsu, 1983 from India. The circular mitogenome of the new species is 17,705 bp in length, including 12 protein coding genes, two ribosomal genes, and 22 transfer RNAs. Via analysis of gene order of mitochondrial genomes, the presently available pattern of mitochondrial gene rearrangement in the suborder Continenticola is discussed.
{"title":"Integrative description of a new species of Dugesia (Platyhelminthes, Tricladida, Dugesiidae) from southern China, with its complete mitogenome and a biogeographic evaluation","authors":"Ying Zhu, JiaJie Huang, R. Sluys, Yi Liu, Ting Sun, AN-TAI Wang, Yu Zhang","doi":"10.3897/zse.100.114016","DOIUrl":"https://doi.org/10.3897/zse.100.114016","url":null,"abstract":"A new species of freshwater flatworm of the genus Dugesia from Guangdong Province in China is described through an integrative approach, including molecular and morphological data, as well as mitochondrial genome analysis. The new species, Dugesia ancoraria Zhu & Wang, sp. nov., is characterised by: (a) a highly asymmetrical penis papilla, provided with a hunchback-like dorsal bump; (b) a short duct between seminal vesicle and ejaculatory duct; and (c) a postero-ventral course of the ejaculatory duct, which opens to the exterior at the subterminal, ventral part of the penis papilla. The molecular phylogenetic tree obtained from the concatenated dataset of four DNA markers (18S rDNA, ITS-1, 28S rDNA, COI) facilitated determination of the phylogenetic position of the new species, which shares a sister-group relationship with a small clade, comprising D. notogaea Sluys & Kawakatsu, 1998 from Australia and D. bengalensis Kawakatsu, 1983 from India. The circular mitogenome of the new species is 17,705 bp in length, including 12 protein coding genes, two ribosomal genes, and 22 transfer RNAs. Via analysis of gene order of mitochondrial genomes, the presently available pattern of mitochondrial gene rearrangement in the suborder Continenticola is discussed.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140454612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Vu, Anh D. Nguyen, Thi Mai Linh Le, R. Peña‐Santiago
Two known species of the genus Sporonchulus, namely S. ibitiensis and S. vagabundus, collected from natural areas of Vietnam, are characterized, including descriptions and illustrations of both species, as well as SEM observations and molecular (18S-, 28S rDNA) analyses of S. ibitiensis. The identity of the two species is discussed, with detailed comparison with previously known populations. The taxonomy of the genus is updated, presenting a diagnosis, list of species, key to their identification, and a compendium of their main morphometrics. An integrative analysis, combining morphological data with a cladistic approach and the first molecular study for a representative of Sporonchulus, better supports a narrow relationship of this genus with Mononchidae than with Mylonchulidae members, however further research should be conducted to elucidate its phylogeny.
{"title":"Updated taxonomy and new insights into the evolutionary relationships of the genus Sporonchulus Cobb, 1917 (Nematoda, Mononchida) after the study of two Vietnamese species","authors":"T. Vu, Anh D. Nguyen, Thi Mai Linh Le, R. Peña‐Santiago","doi":"10.3897/zse.100.118675","DOIUrl":"https://doi.org/10.3897/zse.100.118675","url":null,"abstract":"Two known species of the genus Sporonchulus, namely S. ibitiensis and S. vagabundus, collected from natural areas of Vietnam, are characterized, including descriptions and illustrations of both species, as well as SEM observations and molecular (18S-, 28S rDNA) analyses of S. ibitiensis. The identity of the two species is discussed, with detailed comparison with previously known populations. The taxonomy of the genus is updated, presenting a diagnosis, list of species, key to their identification, and a compendium of their main morphometrics. An integrative analysis, combining morphological data with a cladistic approach and the first molecular study for a representative of Sporonchulus, better supports a narrow relationship of this genus with Mononchidae than with Mylonchulidae members, however further research should be conducted to elucidate its phylogeny.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139775647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Vu, Anh D. Nguyen, Thi Mai Linh Le, R. Peña‐Santiago
Two known species of the genus Sporonchulus, namely S. ibitiensis and S. vagabundus, collected from natural areas of Vietnam, are characterized, including descriptions and illustrations of both species, as well as SEM observations and molecular (18S-, 28S rDNA) analyses of S. ibitiensis. The identity of the two species is discussed, with detailed comparison with previously known populations. The taxonomy of the genus is updated, presenting a diagnosis, list of species, key to their identification, and a compendium of their main morphometrics. An integrative analysis, combining morphological data with a cladistic approach and the first molecular study for a representative of Sporonchulus, better supports a narrow relationship of this genus with Mononchidae than with Mylonchulidae members, however further research should be conducted to elucidate its phylogeny.
{"title":"Updated taxonomy and new insights into the evolutionary relationships of the genus Sporonchulus Cobb, 1917 (Nematoda, Mononchida) after the study of two Vietnamese species","authors":"T. Vu, Anh D. Nguyen, Thi Mai Linh Le, R. Peña‐Santiago","doi":"10.3897/zse.100.118675","DOIUrl":"https://doi.org/10.3897/zse.100.118675","url":null,"abstract":"Two known species of the genus Sporonchulus, namely S. ibitiensis and S. vagabundus, collected from natural areas of Vietnam, are characterized, including descriptions and illustrations of both species, as well as SEM observations and molecular (18S-, 28S rDNA) analyses of S. ibitiensis. The identity of the two species is discussed, with detailed comparison with previously known populations. The taxonomy of the genus is updated, presenting a diagnosis, list of species, key to their identification, and a compendium of their main morphometrics. An integrative analysis, combining morphological data with a cladistic approach and the first molecular study for a representative of Sporonchulus, better supports a narrow relationship of this genus with Mononchidae than with Mylonchulidae members, however further research should be conducted to elucidate its phylogeny.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139835144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Akrachai Aksornneam, Attapol Rujirawan, Siriporn Yodthong, Yik‐Hei Sung, A. Aowphol
We described a new species of elapid snake genus Bungarus from the Tenasserim Mountain Range in Ratchaburi Province, western Thailand. Bungarus sagittatus sp. nov. can be distinguished from all congeners by having the combination of 15 dorsal scale rows; 215–217 ventral scales; 48–56 undivided subcaudal; prefrontal suture 2.4–2.6 times length of internasal suture; anterior chin shields larger than posterior chin shields; head of adult uniform black while juvenile black with small dim white patches on temporal and parietal areas; dorsal body black, with 25–31 white narrow bands, white and black bands at midbody covering 1.5–3.0 and 4.5–6.0 vertebral scales, respectively; dorsal body black bands not intruding ventrals or intruding ventrals less than 0.5 times of width of outer dorsal scales; ventral surface of body immaculate white; ventral side of tail white with a row of dark brown triangular patches on middle pointing posteriorly; tail relatively long, tail length/total length 0.140–0.143. Genetically, the new species has uncorrected pairwise divergences of ≥ 8.29% of the mitochondrial cytochrome b from other Bungarus species. Currently, the new species is only known from the type locality.
{"title":"A new species of krait of the genus Bungarus (Squamata, Elapidae) from Ratchaburi Province, western Thailand","authors":"Akrachai Aksornneam, Attapol Rujirawan, Siriporn Yodthong, Yik‐Hei Sung, A. Aowphol","doi":"10.3897/zse.100.116601","DOIUrl":"https://doi.org/10.3897/zse.100.116601","url":null,"abstract":"We described a new species of elapid snake genus Bungarus from the Tenasserim Mountain Range in Ratchaburi Province, western Thailand. Bungarus sagittatus sp. nov. can be distinguished from all congeners by having the combination of 15 dorsal scale rows; 215–217 ventral scales; 48–56 undivided subcaudal; prefrontal suture 2.4–2.6 times length of internasal suture; anterior chin shields larger than posterior chin shields; head of adult uniform black while juvenile black with small dim white patches on temporal and parietal areas; dorsal body black, with 25–31 white narrow bands, white and black bands at midbody covering 1.5–3.0 and 4.5–6.0 vertebral scales, respectively; dorsal body black bands not intruding ventrals or intruding ventrals less than 0.5 times of width of outer dorsal scales; ventral surface of body immaculate white; ventral side of tail white with a row of dark brown triangular patches on middle pointing posteriorly; tail relatively long, tail length/total length 0.140–0.143. Genetically, the new species has uncorrected pairwise divergences of ≥ 8.29% of the mitochondrial cytochrome b from other Bungarus species. Currently, the new species is only known from the type locality.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140482059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nadeshinie Parasram, William Santana, Yvonne Vallès, A. Windsor, Henri Vallès
The large degree of morphological variations, particularly amongst juveniles, has led to inconsistencies in the literature regarding the taxonomic status of Amphithrax aculeatus (Herbst, 1790) and Amphithrax verrucosus (H. Milne Edwards, 1832). As a result of recent biodiversity sampling initiatives in Barbados, West Indies, multiple specimens of Amphithrax aculeatus and A. verrucosus have been collected. This has prompted us to undertake a thorough reassessment of their morphological and molecular characteristics. Moreover, morphological differences in the carapace, antennae, chelipeds, pereopods and the male first gonopod (G1) supports A. aculeatus and A. verrucosus as separate species. Molecular phylogenetic analysis, based on newly-generated sequences of the 12S rRNA, 16S rRNA and ITS-1 genes also shows that A. verrucosus is a separate species and sister taxa to A. aculeatus. The total number of species within the genus Amphithrax is now brought to eleven. However, our molecular analysis also shows that the taxonomic placement of Amphithrax armatus (Saussure, 1853) within Amphithrax is questionable.
{"title":"Morphological and molecular support for Amphithrax verrucosus (H. Milne Edwards, 1832) and Amphithrax aculeatus (Herbst, 1790) (Crustacea, Decapoda, Brachyura) as valid species","authors":"Nadeshinie Parasram, William Santana, Yvonne Vallès, A. Windsor, Henri Vallès","doi":"10.3897/zse.100.109192","DOIUrl":"https://doi.org/10.3897/zse.100.109192","url":null,"abstract":"The large degree of morphological variations, particularly amongst juveniles, has led to inconsistencies in the literature regarding the taxonomic status of Amphithrax aculeatus (Herbst, 1790) and Amphithrax verrucosus (H. Milne Edwards, 1832). As a result of recent biodiversity sampling initiatives in Barbados, West Indies, multiple specimens of Amphithrax aculeatus and A. verrucosus have been collected. This has prompted us to undertake a thorough reassessment of their morphological and molecular characteristics. Moreover, morphological differences in the carapace, antennae, chelipeds, pereopods and the male first gonopod (G1) supports A. aculeatus and A. verrucosus as separate species. Molecular phylogenetic analysis, based on newly-generated sequences of the 12S rRNA, 16S rRNA and ITS-1 genes also shows that A. verrucosus is a separate species and sister taxa to A. aculeatus. The total number of species within the genus Amphithrax is now brought to eleven. However, our molecular analysis also shows that the taxonomic placement of Amphithrax armatus (Saussure, 1853) within Amphithrax is questionable.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139595457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Four new species of the chrysilline genus Phintella – P. dentissp. nov. (♂♀), P. handersonisp. nov. (♂♀), P. lunasp. nov. (♀) and P. rajbharathisp. nov. (♂) – are described from India. Additionally, the unknown female of Phintella platnicki Sudhin, Sen & Caleb, 2023 is described and new distributional data are provided for this species. Notes on the type locality and distribution of P. accentifera (Simon, 1901) are provided along with clarification on the identity of other non-type materials. Detailed morphological descriptions, illustrations and a distributional map are also given.
{"title":"Additions to the knowledge on the genus Phintella Strand, 1906 (Araneae, Salticidae, Chrysillini) from India","authors":"P. P. Sudhin, J. Caleb, Souvik Sen","doi":"10.3897/zse.100.113049","DOIUrl":"https://doi.org/10.3897/zse.100.113049","url":null,"abstract":"Four new species of the chrysilline genus Phintella – P. dentissp. nov. (♂♀), P. handersonisp. nov. (♂♀), P. lunasp. nov. (♀) and P. rajbharathisp. nov. (♂) – are described from India. Additionally, the unknown female of Phintella platnicki Sudhin, Sen & Caleb, 2023 is described and new distributional data are provided for this species. Notes on the type locality and distribution of P. accentifera (Simon, 1901) are provided along with clarification on the identity of other non-type materials. Detailed morphological descriptions, illustrations and a distributional map are also given.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139593715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Turan, Esra Bayçelebi, Sadi Aksu, Münevver Oral
The taxonomic status of native trout species of the Marmara and Aegean Sea drainages is evaluated and three species, Salmo duhani, S. coruhensis and S. brunoisp. nov., are recognized. Salmo brunoi, a new species, is described from the Nilüfer River, a tributary of the Susurluk River. It is distinguished by a general brownish body color in life; few black spots (fewer than 60) on the body, generally scattered on the back and the upper part of the flank, rarely in the median part; few (fewer than 40) and small (smaller than pupil) red spots on the body, scattered on the median part and lower half of the flank; a number of black and red spots not increasing with size in both sexes; a long adipose fin (adipose-fin height 8–9% SL); a short distance between adipose-fin and caudal-fin (12–14% SL); and a short anal fin (anal-fin height 12–15% SL). Salmo brunoisp. nov. is separated from the rest of the Marmara and Aegean trouts of Anatolia based on genome-wide distributed 187.385 unlinked SNP markers. According to the best of the authors’ knowledge, whole genome data is used for the first time here to characterize a new species of trout.
{"title":"The trouts of the Marmara and Aegean Sea drainages in Türkiye, with the description of a new species (Teleostei, Salmonidae)","authors":"D. Turan, Esra Bayçelebi, Sadi Aksu, Münevver Oral","doi":"10.3897/zse.100.112557","DOIUrl":"https://doi.org/10.3897/zse.100.112557","url":null,"abstract":"The taxonomic status of native trout species of the Marmara and Aegean Sea drainages is evaluated and three species, Salmo duhani, S. coruhensis and S. brunoisp. nov., are recognized. Salmo brunoi, a new species, is described from the Nilüfer River, a tributary of the Susurluk River. It is distinguished by a general brownish body color in life; few black spots (fewer than 60) on the body, generally scattered on the back and the upper part of the flank, rarely in the median part; few (fewer than 40) and small (smaller than pupil) red spots on the body, scattered on the median part and lower half of the flank; a number of black and red spots not increasing with size in both sexes; a long adipose fin (adipose-fin height 8–9% SL); a short distance between adipose-fin and caudal-fin (12–14% SL); and a short anal fin (anal-fin height 12–15% SL). Salmo brunoisp. nov. is separated from the rest of the Marmara and Aegean trouts of Anatolia based on genome-wide distributed 187.385 unlinked SNP markers. According to the best of the authors’ knowledge, whole genome data is used for the first time here to characterize a new species of trout.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139593938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Phoxinus radeki, a new species, is described from the Ergene River (Aegean Sea Basin). It is distinguished from Phoxinus species in Türkiye and the adjacent area by having the scales of the breast, scaled but separated unscaled area anteriorly, short dark rectangular blotches along the lateral line between the lateral line and belly yellowish in both males and females, body depth dorsal fin origin 16–21% SL, caudal peduncle depth 8–10% SL. Additionally, molecular results demonstrated that the new species differed from its closest congeners with a mean genetic distance value of 3.08% (min. 2.82–max. 3.29) and moderately support values in cytochrome b (Cyt b) gene partial sequences (1064 bp.). Further, the species delimitation analysis identified the new species as a single MOTU independent of other Phoxinus species.
{"title":"Description of a new species of Phoxinus from the Ergene River (Aegean Sea Basin) in Türkiye (Actinopterygii, Leuciscidae)","authors":"Esra Bayçelebi, I. Aksu, D. Turan","doi":"10.3897/zse.100.113467","DOIUrl":"https://doi.org/10.3897/zse.100.113467","url":null,"abstract":"Phoxinus radeki, a new species, is described from the Ergene River (Aegean Sea Basin). It is distinguished from Phoxinus species in Türkiye and the adjacent area by having the scales of the breast, scaled but separated unscaled area anteriorly, short dark rectangular blotches along the lateral line between the lateral line and belly yellowish in both males and females, body depth dorsal fin origin 16–21% SL, caudal peduncle depth 8–10% SL. Additionally, molecular results demonstrated that the new species differed from its closest congeners with a mean genetic distance value of 3.08% (min. 2.82–max. 3.29) and moderately support values in cytochrome b (Cyt b) gene partial sequences (1064 bp.). Further, the species delimitation analysis identified the new species as a single MOTU independent of other Phoxinus species.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139593172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A new species of the pseudoscorpion genus Ditha Chamberlin, 1929, is described from Kerala State, India. A detailed morphological description, diagnostic features, and illustrations of Ditha (Paraditha) shivanparaensis Jeong, Harms & Johnson, sp. nov. are provided. The current distribution of all the known Ditha species is mapped, and an identification key for the genus is provided.
{"title":"A new species of Ditha (Pseudoscorpiones, Chthoniidae, Tridenchthoniinae) from the Western Ghats of India, with an identification key for the genus","authors":"Kyung-Hoon Jeong, Danilo Harms, Jithin Johnson","doi":"10.3897/zse.100.110020","DOIUrl":"https://doi.org/10.3897/zse.100.110020","url":null,"abstract":"A new species of the pseudoscorpion genus Ditha Chamberlin, 1929, is described from Kerala State, India. A detailed morphological description, diagnostic features, and illustrations of Ditha (Paraditha) shivanparaensis Jeong, Harms & Johnson, sp. nov. are provided. The current distribution of all the known Ditha species is mapped, and an identification key for the genus is provided.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139594410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Vanegas-Ríos, Wilson Sebastián Serra Alanís, M. Azpelicueta, Thomas Litz, L. Malabarba
Diapoma pampeana was recently described to occur in the upper Negro basin in Uruguay and Brazil. An isolated population tentatively identified as D. pampeana from the Pando stream, a perturbed coastal drainage in Uruguay, is studied and compared under the light of morphological and molecular data to test if there is evidence to consider it as a separate species. New geographical records for the species are presented and included in the comparisons. The specimens analyzed were pooled into four groups: Pando, Santa Lucía, Middle Negro and Upper Negro. We analyzed 32 morphological characters using statistical procedures and recovered a COI-based phylogeny of different populations of D. pampeana to test if they may represent different species. Size-corrected PCA revealed that the Pando and Upper Negro groups are greatly diverging in both morphometric and meristic data along PC1 (mainly by the snout to dorsal-fin origin, dorsal to adipose-fin origins, number of longitudinal scales and predorsal scales). This deviating pattern was also obtained in a cluster analysis. The Santa Lucía and Middle Negro groups were found to be intermediate morphotypes. In contrast, molecular analyses revealed that the Pando and Upper Negro specimens resemble genetically and, thus, are placed together in the Neighbor-joining and Bayesian topologies, as part of a monophyletic Diapoma. We proposed that the Pando population, despite its deviating morphology observed, can be classified as D. pampeana. Therefore, this population constitutes a remarkable example of an isolated population that is morphologically divergent but genetically similar to the geographically most distant conspecific population.
Diapoma pampeana最近被描述为出现在乌拉圭和巴西的上内格罗河流域。pampeana 的一个孤立种群进行了研究，并根据形态学和分子数据对其进行了比较，以检验是否有证据将其视为一个单独的物种。比较中还介绍了该物种的新地理记录。分析的标本共分为四组：潘多、圣卢西亚、中内格罗和上内格罗。我们使用统计程序分析了 32 个形态特征，并恢复了 D. pampeana 不同种群的基于 COI 的系统发育，以检验它们是否可能代表不同的物种。经尺寸校正的 PCA 显示，潘多和上内格罗两组在形态和经体数据上沿 PC1（主要是吻鳍至背鳍起源、背鳍至脂肪鳍起源、纵鳞数量和食肉鳞）有很大差异。聚类分析也得出了这种偏离模式。圣卢西亚组和中内格罗组被认为是中间形态。相反，分子分析表明，潘多和上内格罗的标本在基因上相似，因此在邻接拓扑和贝叶斯拓扑中被放在一起，成为单系Diapoma的一部分。我们认为，尽管潘多种群的形态有偏差，但仍可归类为 D. pampeana。因此，该种群构成了一个孤立种群的杰出范例，该种群在形态上与地理上最遥远的同种种群存在差异，但在遗传学上却与之相似。
{"title":"Population variation of Diapoma pampeana (Characiformes, Characidae, Stevardiinae) from an isolated coastal drainage in Uruguay, with new records: comparing morphological and molecular data","authors":"J. Vanegas-Ríos, Wilson Sebastián Serra Alanís, M. Azpelicueta, Thomas Litz, L. Malabarba","doi":"10.3897/zse.100.112778","DOIUrl":"https://doi.org/10.3897/zse.100.112778","url":null,"abstract":"Diapoma pampeana was recently described to occur in the upper Negro basin in Uruguay and Brazil. An isolated population tentatively identified as D. pampeana from the Pando stream, a perturbed coastal drainage in Uruguay, is studied and compared under the light of morphological and molecular data to test if there is evidence to consider it as a separate species. New geographical records for the species are presented and included in the comparisons. The specimens analyzed were pooled into four groups: Pando, Santa Lucía, Middle Negro and Upper Negro. We analyzed 32 morphological characters using statistical procedures and recovered a COI-based phylogeny of different populations of D. pampeana to test if they may represent different species. Size-corrected PCA revealed that the Pando and Upper Negro groups are greatly diverging in both morphometric and meristic data along PC1 (mainly by the snout to dorsal-fin origin, dorsal to adipose-fin origins, number of longitudinal scales and predorsal scales). This deviating pattern was also obtained in a cluster analysis. The Santa Lucía and Middle Negro groups were found to be intermediate morphotypes. In contrast, molecular analyses revealed that the Pando and Upper Negro specimens resemble genetically and, thus, are placed together in the Neighbor-joining and Bayesian topologies, as part of a monophyletic Diapoma. We proposed that the Pando population, despite its deviating morphology observed, can be classified as D. pampeana. Therefore, this population constitutes a remarkable example of an isolated population that is morphologically divergent but genetically similar to the geographically most distant conspecific population.","PeriodicalId":48677,"journal":{"name":"Zoosystematics and Evolution","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139594697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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