Journal of Zoological Systematics and Evolutionary Research最新文献

{"title":"Morphology, Phylogeny, and Evolution of the Rarely Known Genus Admetella McIntosh, 1885 (Annelida, Polynoidae) with Recognition of Four New Species from Western Pacific Seamounts","authors":"Xuwen Wu,&nbsp;Qi Kou,&nbsp;Yanan Sun,&nbsp;Wenquan Zhen,&nbsp;Kuidong Xu","doi":"10.1155/2024/9886076","DOIUrl":"https://doi.org/10.1155/2024/9886076","url":null,"abstract":"<div>\u0000 <p>The polynoid genus <i>Admetella</i> constitutes a deep-sea assemblage of polychaetes, notable for their large bodies adorned with antennal scales positioned dorsally to the bases of lateral antennae. Furthermore, the genus exhibits swimming proficiencies facilitated by elongated parapodia and flattened chaetae. Despite the frequent encounters with <i>Admetella</i> members during various deep-sea explorations, a substantial gap in our comprehension of their diversity, phylogeny, and evolutionary trajectories still exists. Our thorough morphological and phylogenetic investigations of specimens obtained from three seamounts located in the tropical western Pacific have unveiled six species belonging to the genus <i>Admetella</i>, four of these being newly identified as <i>Admetella multiseta</i> sp. nov., <i>A. levensteini</i> sp. nov., <i>A. nanhaiensis</i> sp. nov., and <i>A</i>. <i>undulata</i> sp. nov. The other two species of <i>Admetella</i> remain unidentifiable at the species level due to the loss of crucial details. Our phylogenetic analysis, grounded on 13 mitochondrial protein-coding genes and the inclusion of 12S, 16S, 18S, 28S rRNA, and ITS1–ITS2 genes, substantiates the monophyly of <i>Admetella</i>. <i>Admetella</i> is positioned at an intermediate node within the phylogenetic tree, situated between representative shallow-water and deep-sea subfamilies. The independent evolution of antennal scales within <i>Admetella</i> among polynoids constitutes a synapomorphy for this genus. Ancestral state reconstruction (ASR) analyses suggest that deep-sea polynoids evolved from shallow-water ancestors that possessed lateral antennae, which were subsequently lost in members inhabiting extreme marine environments, such as deep-sea hydrothermal vents and anchialine caves. The analysis further implicates that swimming ability independently evolved at least four times within the Polynoidae family.</p>\u0000 </div>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/9886076","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142429650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association between Genetic Admixture and Morphological Patterns in a Hybrid Zone between the Two Iberian Vipers, Vipera aspis and V. latastei","authors":"Inês Freitas,&nbsp;Guillermo Velo-Antón,&nbsp;Antigoni Kaliontzopoulou,&nbsp;Óscar Zuazo,&nbsp;Fernando Martínez-Freiría","doi":"10.1155/2024/3800363","DOIUrl":"https://doi.org/10.1155/2024/3800363","url":null,"abstract":"<div>\u0000 <p>Understanding how hybridization influences the morphology and fitness of hybrids is essential for studying adaptive evolution and ecological speciation. Secondary contact zones, where separately evolving populations meet and hybridize, offer valuable insights into the evolutionary processes driving speciation and provide an excellent system to address these questions. In this study, we investigate patterns of morphological and genetic variation of two congeneric viper species, <i>Vipera aspis</i> and <i>V. latastei</i>, across a contact zone in northern Spain (Oja-Tirón), where vipers with mixed morphology are often detected, but genetic studies addressing hybridization and relating patterns of genetic and morphological admixture are lacking. Using nine morphological traits (scalation and colouration) and 18 microsatellite markers, we (1) estimated the extent of hybridization, (2) morphologically characterized parental species and hybrids, and (3) evaluated the correlation between patterns of genetic and morphological admixture. Analyses revealed a bimodal hybrid zone with high rate of hybridization (22%) and prevalence of late-generation hybrids (F2 and backcrosses). Morphological analyses differentiated the two parental species, and a positive correlation (<i>r</i> = 0.95) was found between morphological and genetic patterns. The hybrid group displayed on average an intermediate morphology between the parentals, yet morphologically intermediate hybrids were rare in our dataset. Instead, most hybrids resembled the parental species with whom they share most of the genetic background. Notably, the hybrid group exhibited greater morphological variation than the parental groups. Traits with adaptative value, such as ventral scales and dorsal marks, showed significant differences between hybrids and the two parental species. Introgression of these traits may confer ecological advantages to hybrids, enhancing local adaptation. Overall, this study reveals a positive correlation between patterns of morphological and genetic variation across a hybrid zone and provides insights into the phenotypic consequences of hybridization on these viper species.</p>\u0000 </div>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/3800363","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142152344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular Systematics and Divergence of Tor and Neolissochilus Fishes (Cypriniforms: Cyprinidae) from Southeast Asia and South China","authors":"Ling Wu,&nbsp;Tao Qin,&nbsp;Huy Duc Hoang,&nbsp;Thaung Naing Oo,&nbsp;Xiao-Ai Wang,&nbsp;Xiao-Yong Chen","doi":"10.1155/2024/5662867","DOIUrl":"https://doi.org/10.1155/2024/5662867","url":null,"abstract":"<div>\u0000 <p>In Southeast Asia, mahseer fishes, such as the species of <i>Tor</i> and <i>Neolissochilus</i>, are significant native commercial fish. Their phylogeny and categorization have a convoluted history. In this study, the molecular systematics and divergence of <i>Tor</i> and <i>Neolissochilus</i> fishes from Southeast Asia and South China were examined using the partial or complete sequences of four mitochondrial genes (cytochrome oxidase I, cytochrome <i>b</i>, 16S, and ND4). This study substantiated the monophyly of <i>Tor</i> and supported <i>N. benasi</i> as an independent genus. The result supported <i>T. laterivittatus</i> as a synonym of <i>T. sinensis</i> and <i>T. dongnaiensis</i> as a synonym of <i>T. tambra</i>. In addition, we presented the high diversity and species crypticity of these two taxa in Southeast Asia. The divergent time estimation indicated <i>Tor</i> and <i>Neolissochilus</i> species originated in the early Miocene (about 16.73 Ma), and the divergence of the genus <i>Tor</i> and other species of the genus <i>Neolissochilus</i> began at about 12.86 Ma.</p>\u0000 </div>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/5662867","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142137765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phylogeny of the Genera with Oromandibular Discs in the Subfamily Labeoninae (Teleostei: Cyprinidae) with Descriptions of Two New Genera","authors":"Xu Li,&nbsp;Wei Zhou,&nbsp;Chao Sun,&nbsp;Xing Yun","doi":"10.1155/2024/5554567","DOIUrl":"https://doi.org/10.1155/2024/5554567","url":null,"abstract":"<div>\u0000 <p>The aim of this study was to understand the systematic relationships between certain fish genera with oromandibular discs in the Labeoninae. At the same time, this was an opportunity to clarify the taxonomic status of certain species in the genera <i>Ageneiogarra</i>, <i>Garra</i>, <i>Placocheilus</i>, and other taxa distributed in China. Morphological comparison and molecular analysis were used in the study. The results showed that the genera with oromandibular discs had no recent common ancestor and that their oromandibular discs were the result of convergent evolution in different evolutionary lineages. Due to the homogeneity of their habitats, these fish have evolved oromandibular discs with similar appearance and structure. Both morphological and molecular evidence suggests that (1) <i>Placocheilus cryptonemus</i> distributed in the Nu-Jiang (the Upper Salween River Basin), Yunnan, China, represent a new genus, here described as <i>Pseudoplacocheilus</i>, and (2) <i>Garra micropulvinus</i> occurring in the Panlong-He (the upper portion of the Lo River, a branch of the Red River Basin) from Wenshan, Yunnan, represents another new genus, here described as <i>Supradiscus</i>.</p>\u0000 </div>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/5554567","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141315482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Age-Stage, Two-Sex Life Table of an Alarming Quarantine Pest Trogoderma granarium on Stored Products","authors":"Muhammad Ramzan,&nbsp;Ghulam Murtaza,&nbsp;Sadia Maalik,&nbsp;Sajida Mushtaq,&nbsp;Waqar Majeed,&nbsp;Khaoula Elhadef,&nbsp;Amor Hedfi,&nbsp;Manel Ben Ali,&nbsp;Naureen Rana","doi":"10.1155/2024/8896414","DOIUrl":"10.1155/2024/8896414","url":null,"abstract":"<div>\u0000 <p><i>Trogoderma granarium</i> (Coleoptera: Dermestidae) is a polyphagous pest of stored products and an alarming threat to food security around the globe. The current study is designed to construct the life table of <i>T. granarium</i> on four stored products, i.e., wheat, barley, rice, and maize at controlled conditions (33 ± 1^°C, 65% RH, and a photoperiod of 14 : 10 (L:D) h). The incubation period of <i>T. granarium</i> was longer (5.13 d) on maize and shorter (4.30 d) on wheat. The developmental period of 1^st, 2^nd, 3^rd, and 4^th larval instars of <i>T. granarium</i> was longer on maize than the other three hosts were significant. Statistical difference between the longevity of females and males was recorded, while no statistically significant difference was found in the preoviposition period. The mean fecundity values observed on wheat, barley, rice, and maize were 31.33 ± 1.62, 26.21 ± 1.49, 28.00 ± 1.35, and 25.58 ± 1.13, respectively. The highest fertility was observed in wheat and the lowest in maize. The net reproductive rate (<i>R</i>₀) of <i>T. granarium</i> ranged from 8.66 ± 2.86, 13.16 ± 2.65, 12.53 ± 2.27, and 10.23 ± 2.32 offsprings on wheat, barley, rice, and maize, respectively. The highest gross reproductive value (GRR) was for <i>T. granarium</i> reared on barley (18.31 ± 4.10/d), and the lowest was for maize (15.35 ± 2.95/d). To complete the development, <i>T. granarium</i> took 48.97 ± 0.68 d on maize, significantly higher than on other treatments (<i>p</i> &lt; 0.05). The mean generation time (T) of <i>T. granarium</i> was considerably affected by tested products. Based on the results of the present study, maize is a less favorable diet for the development and reproduction of <i>T. granarium</i> and may be considered for the management of this detrimental pest.</p>\u0000 </div>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/8896414","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141099578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Areas of Endemism and Biogeographic Regionalization of the Iberian Peninsula Based on Ants (Hymenoptera: Formicidae)","authors":"Diego López-Collar,&nbsp;Tania Escalante","doi":"10.1155/2024/4162370","DOIUrl":"10.1155/2024/4162370","url":null,"abstract":"<div>\u0000 <p>Based on the distribution of 275 species of ants native to the Iberian Peninsula (IP), we identified areas of endemism (AE) within its geographical limits and present a biogeographic regionalization using two complementary methods and two types of operational geographical units. For endemicity analysis (EA), we used a 100 km² grid cell, and for parsimony analysis of endemicity (PAE), we used hydrological basins as natural units. The EA revealed twelve areas of endemism that were grouped into five consensus areas. These are the Northeastern area, South plateau, Guadalquivir Valley, Baetic System, and Iberian Peninsula (whole). PAE resulted in a cladogram that classified hydrological basins into at least two successively nested subsets: an Atlantic group that is more related to northern European fauna and an Iberian subset that is well supported by synapomorphies. The Iberian subset was differentiated into four main areas: (a) a Northeastern area formed by the Pyrenees and the Catalan Coastal Range, (b) a mainland area containing the Central System and Guadiana and Tajo valleys, (c) a Southern area consisting of the Guadalquivir Valley and the Baetic System, and (d) a Northern coastal area. The results showed congruence between the two methods since many of the synapomorphies are shared among the diagnostic and IP endemic species of the EA. Both EA and PAE showed the relevance of the heterogeneous peninsular orography that combines mountainous regions with valleys and plateaus, which have acted as historical barriers or corridors. The presence of numerous endemic species, particularly in the southern third of the IP, suggests that several Iberian refuges for ants originated during glacial periods. These areas constitute priority sites for the conservation of ants in particular and biodiversity in general on the IP and allow further research about the processes that generated these distributional patterns.</p>\u0000 </div>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/4162370","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genetic Profile of Greek Indigenous Honey Bee Populations, Local Extinctions, Geographical Distinction, and Patterns, by Using mtDNA COI and Nuclear CSD Gene Analysis Markers","authors":"Konstantinos Zampakas,&nbsp;Maria V. Alvanou,&nbsp;Anastasia Kalapouti,&nbsp;Fani Hatjina,&nbsp;Chrysoula Tananaki,&nbsp;Katerina Melfou,&nbsp;Ioannis A. Giantsis","doi":"10.1155/2024/5466016","DOIUrl":"10.1155/2024/5466016","url":null,"abstract":"<div>\u0000 <p>Evaluation and conservation of local genetic resources of the domestic honey bee populations is important, especially in regions with high diversity levels as well as high honey bee colony density. Greece is rich in honey bee biodiversity, hosting several subspecies, with the status of them being, though, doubtful. The purpose of the present study was to investigate the genetic relationships of both stationary and movable honey bee populations, originating from many location throughout Greece. Two molecular markers were utilized, namely, the conserved mitochondrial <i>COI</i> gene and the highly variable complementary sex determination (<i>CSD</i>) gene. Samples were collected from nine distant populations: eight populations from colonies that followed the traditional stationary beekeeping model and one following the modern migratory beekeeping model type, where the hives are transferred from place to place according to the season. Regardless the beekeeping model, all populations were characterized by sufficient genetic diversity indicating no signs of inbreeding or any bottleneck effects. Nevertheless, genetic differentiation and phylogenetic analysis in comparison with haplotypes obtained from GenBank revealed a genetic admixture pattern suggesting that movement causes genetic homogeneity, occasionally in the stable reared populations as well. Interestingly, two populations, namely, Kastoria and Protokklisi, belonging to <i>A. m. macedonica</i> population, were significantly differentiated, supporting the maintenance of their genetic integrity. Unfortunately, on the other hand, genetic structure of the populations from Crete (Sasalos population) provided evidence that the indigenous breed from the island, <i>A. m. adami</i>, has probably gone extinct. Future management strategies should focus on the conservation of the local genetic resources in which distinct genetic identity has been sustained.</p>\u0000 </div>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/5466016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mitogenomic Characterization of South African Leopards and the Effect of Past Climatic Events","authors":"Laura Tensen,&nbsp;Arsalan Emami-Khoyi,&nbsp;Anubhab Khan,&nbsp;Gerrie Camacho,&nbsp;Lourens Swanepoel,&nbsp;Klaus Fischer","doi":"10.1155/2024/2174469","DOIUrl":"10.1155/2024/2174469","url":null,"abstract":"<div>\u0000 <p>Revealing phylogeographic structure is important for accurate subspecies delineation and understanding a species’ evolutionary history. In leopards (<i>Panthera pardus</i>), there are currently nine subspecies recognized. On the African continent, only one subspecies occurs (<i>P. p. pardus</i>), although mitochondrial DNA from historical samples suggests the presence of three putative continental clades: (1) West Africa (WA), (2) Central Africa (CA), and (3) Southern Africa (SA). So far, whole genome data did not recover this phylogeographic structure, although leopards in the southern periphery of their distribution range in Africa have not yet been investigated in detail. The Mpumalanga province of South Africa is of particular interest, as here, the CA and the SA clade possibly meet. The aim of this study was to characterize the first mitogenomes of African leopards from Mpumalanga, to help clarifying how South African leopards fit into continental patterns of genetic differentiation. Complete mitogenomes from nine leopards, including a strawberry leopard, were assembled <i>de novo</i> and included in phylogenetic analysis, in combination with 32 publicly available mitogenomes. Bayesian inference and maximum likelihood analyses identified two deeply diverged putative clades within South Africa, which were more genetically distinct than two subspecies in Asia. The clades dated back to 0.76-0.86 million years ago, indicating that they originated during the climatically unstable Mid-Pleistocene, as seen in other large mammals. The Pleistocene refuge theory states that the maintenance of savanna refugia in East and Southern Africa promoted the divergence between populations. As such, leopards may reflect the unique climatic history of southern Africa, which has resulted in eminent and endemic genetic diversity.</p>\u0000 </div>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/2174469","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140837311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Genus and Two New Species of Notocotylidae Lühe, 1909 (Digenea), from Russia: Morphomolecular Data","authors":"Anna V. Izrailskaia,&nbsp;Yulia V. Tatonova,&nbsp;Yulia V. Belousova","doi":"10.1155/2024/5550780","DOIUrl":"10.1155/2024/5550780","url":null,"abstract":"<div>\u0000 <p>The study of the trematodes of the family Notocotylidae Lühe, 1909, is continued using an integrated approach based on new data. A new genus, <i>Pseudonotocotylus</i> n. gen., has been identified, and two species new to science, <i>Notocotylus multipapillus</i> n. sp. and <i>Pseudonotocotylus martynenkoi</i> n. sp., have been discovered. The life cycle and morphology of developmental stages of the new species are described, and the molecular data for nuclear (28S) and mitochondrial markers (<i>cox1</i> and <i>nad1</i>) are presented. Sequences of <i>cox1</i> and <i>nad1</i> mtDNA genes were obtained for five previously studied notocotylid species for the first time. Phylogenetic relationships within Notocotylidae were inferred from the analysis of these markers, and the results obtained reveal some subtle differences in some of the notocotylid species despite their morphological similarities. Based on the differences in gene sequences among the species, two additional criteria are proposed to divide the genus <i>Notocotylus</i> into <i>Notocotylus</i> and <i>Pseudonotocotylus</i> n. gen. The criteria are based on, first, having the Pulmonata or Prosobranchia group of snails as the first intermediate host and, second, molecular properties, as shown by substitutions specific to genus at various nucleotide locations in alignments for 28S and <i>cox1</i>.</p>\u0000 </div>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/5550780","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140609480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two New Species of Freshwater Planarian (Platyhelminthes, Tricladida, Dugesiidae, Dugesia) from Southern China Exhibit Unusual Karyotypes, with a Discussion on Reproduction in Aneuploid Species","authors":"Lei Wang,&nbsp;Shi-Qing Zhu,&nbsp;Fu-Hao Ma,&nbsp;Xiang-Jun Li,&nbsp;Yu-Hao Zhao,&nbsp;Xin-Xin Sun,&nbsp;Ning Li,&nbsp;Ronald Sluys,&nbsp;De-Zeng Liu,&nbsp;Zi-Mei Dong,&nbsp;Guang-Wen Chen","doi":"10.1155/2024/8299436","DOIUrl":"10.1155/2024/8299436","url":null,"abstract":"<div>\u0000 <p>Two new species of the genus <i>Dugesia</i> from Southern China are described by applying an integrative approach, including morphological, karyological, histological, and molecular information. In the molecular phylogenetic tree, the two new species, <i>Dugesia pendula</i> Chen &amp; Dong, sp. nov. and <i>Dugesia musculosa</i> Chen &amp; Dong, sp. nov., fall into an Eastern Palearctic/Oriental clade and an Oriental/Australasian clade, respectively, while sharing only a rather distant relationship. The separate specific status of the two new species is supported also by their genetic distances. <i>Dugesia pendula</i> is characterized by the following features: symmetrical openings of the oviducts into the bursal canal, a duct between seminal vesicle and diaphragm, small diaphragm, dorsally located seminal vesicle, a penis papilla suspended from the dorsal wall of the male atrium, and mixoploid karyotype with diploid complements of 2<i>n</i> = 2<i>x</i> = 14 + 0 − 1 B-chromosome and triploid complements of 2<i>n</i> = 3<i>x</i> = 21 + 0 − 1 B-chromosome, with all chromosomes being metacentric. <i>Dugesia musculosa</i> is characterized by the following features: asymmetrical openings of the oviducts into the bursal canal; a ventrally displaced ejaculatory duct with a terminal opening; two diaphragms; a bursal canal provided with a strong, thick layer of circular muscle, which extends from the copulatory bursa to the common atrium and gonoduct; the left vas deferens opening at the midlateral wall of the seminal vesicle, while the right sperm duct opens at the dorsolateral wall of the seminal vesicle; and karyotype consisting of complicated diploid and aneuploid mosaicism, with diploid complements of 2<i>n</i> = 2<i>x</i> = 16 and 2<i>n</i> = 2<i>x</i> = 16 − 1^7th-1^8th, with all chromosomes being metacentric. The uncommon karyotypes, combined with the asexual reproduction of aneuploid animals, are evaluated in the context of the relationship between ploidy levels and reproductive modalities in the genus <i>Dugesia</i>.</p>\u0000 </div>","PeriodicalId":54751,"journal":{"name":"Journal of Zoological Systematics and Evolutionary Research","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/8299436","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139918329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}