{"title":"New records of the colonial chrysophyte <i>Urostipulosphaeraarticulata</i> (Chrysophyceae, Ochromonadales) in China.","authors":"Yalu An, Junxue Hao, Fangru Nan, Junping Lv, Qi Liu, Xudong Liu, Shulian Xie, Jia Feng","doi":"10.3897/BDJ.13.e150900","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>The genus <i>Urostipulosphera</i> was established in 2019. Its morphological characteristics are similar to <i>Uroglena</i> and <i>Uroglenopsis</i>, but it differs from both. This genus connects individual cells into communities through a dichotomous branching structure, which distinguishes it from <i>Uroglena</i> and <i>Uroglenopsis</i>. Although there are nine species in this genus, molecular data are available for only four species. Molecular data and species distribution records for <i>Urostipulosphaera</i> are severely lacking. Species of this genus have been recorded in a few locations in Europe and North America.</p><p><strong>New information: </strong>We identified three samples that were discovered in Shanxi Province, China, based on morphological characteristics and molecular phylogenetic analysis. Results of the polygenic phylogenetic tree, based on SSU, <i>rbc</i>L and ITS sequences, showed that the three samples were clustered with <i>Urostipulosphaeraarticulata</i> U5-5 from Czechia, with a high support rate of 100/1.00. Morphological observations further supported this result. Therefore, the three samples were identified as <i>Urostipulosphaeraarticulata</i>. This is the first report in China and enriches the geographic diversity of this species. Moreover, we found the long flagellum with mastigonemes under the scanning electron microscope complementing the description of the morphological characteristics of this species. The ITS2 secondary structure of the specimens differed from that of <i>Urostipulosphaeraarticulata</i> U5-5, which exhibited a loop and five-arm structure. A Bayesian relaxed clock analysis indicated that the genus <i>Urostipulosphaera</i> originated in the Early Cretaceous, approximately 109.85 million years ago (Ma) and diverged into two clades around 79.81 Ma.</p>","PeriodicalId":55994,"journal":{"name":"Biodiversity Data Journal","volume":"13 ","pages":"e150900"},"PeriodicalIF":1.0000,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12179645/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biodiversity Data Journal","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.3897/BDJ.13.e150900","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/1 0:00:00","PubModel":"eCollection","JCR":"Q3","JCRName":"BIODIVERSITY CONSERVATION","Score":null,"Total":0}
引用次数: 0
Abstract
Background: The genus Urostipulosphera was established in 2019. Its morphological characteristics are similar to Uroglena and Uroglenopsis, but it differs from both. This genus connects individual cells into communities through a dichotomous branching structure, which distinguishes it from Uroglena and Uroglenopsis. Although there are nine species in this genus, molecular data are available for only four species. Molecular data and species distribution records for Urostipulosphaera are severely lacking. Species of this genus have been recorded in a few locations in Europe and North America.
New information: We identified three samples that were discovered in Shanxi Province, China, based on morphological characteristics and molecular phylogenetic analysis. Results of the polygenic phylogenetic tree, based on SSU, rbcL and ITS sequences, showed that the three samples were clustered with Urostipulosphaeraarticulata U5-5 from Czechia, with a high support rate of 100/1.00. Morphological observations further supported this result. Therefore, the three samples were identified as Urostipulosphaeraarticulata. This is the first report in China and enriches the geographic diversity of this species. Moreover, we found the long flagellum with mastigonemes under the scanning electron microscope complementing the description of the morphological characteristics of this species. The ITS2 secondary structure of the specimens differed from that of Urostipulosphaeraarticulata U5-5, which exhibited a loop and five-arm structure. A Bayesian relaxed clock analysis indicated that the genus Urostipulosphaera originated in the Early Cretaceous, approximately 109.85 million years ago (Ma) and diverged into two clades around 79.81 Ma.
Biodiversity Data JournalAgricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
2.20
自引率
7.70%
发文量
283
审稿时长
6 weeks
期刊介绍:
Biodiversity Data Journal (BDJ) is a community peer-reviewed, open-access, comprehensive online platform, designed to accelerate publishing, dissemination and sharing of biodiversity-related data of any kind. All structural elements of the articles – text, morphological descriptions, occurrences, data tables, etc. – will be treated and stored as DATA, in accordance with the Data Publishing Policies and Guidelines of Pensoft Publishers.
The journal will publish papers in biodiversity science containing taxonomic, floristic/faunistic, morphological, genomic, phylogenetic, ecological or environmental data on any taxon of any geological age from any part of the world with no lower or upper limit to manuscript size.