Anais da Academia Brasileira de Ciencias最新文献

Bryophyte richness and floristic patterns in Caxiuanã National Forest, Lower Amazon: climatic associations with temperature and precipitation. 亚马逊河下游Caxiuanã国家森林苔藓植物丰富度和区系格局：气候与温度和降水的关系。

IF 1.2 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2026-11-02 eCollection Date: 2026-01-01 DOI: 10.1590/0001-3765202620260163

Jainara P Silva, Tássia T G Takashima, Lucival E Paixão-Jr, Anna Luiza Ilkiu-Borges

{"title":"Bryophyte richness and floristic patterns in Caxiuanã National Forest, Lower Amazon: climatic associations with temperature and precipitation.","authors":"Jainara P Silva, Tássia T G Takashima, Lucival E Paixão-Jr, Anna Luiza Ilkiu-Borges","doi":"10.1590/0001-3765202620260163","DOIUrl":"https://doi.org/10.1590/0001-3765202620260163","url":null,"abstract":"Although harboring high biodiversity, the Amazonian rainforest has lost 20% of its original vegetation. We assessed bryophyte richness, floristic patterns, and their relationships with environmental factors in the Caxiuanã National Forest. The dataset combined collections from 2024-2025 with herbarium and literature records. We identified 218 species, one subspecies, and four varieties, belonging to 27 families and 77 genera. Three species are endemic to Brazil (Micropterygium pterygophyllum, Zoopsidella serra, and Pycnolejeunea gradsteinii), with the latter endemic to the state of Pará. Approximately 38% of the species are shared among the Amazon, Atlantic Forest, and Cerrado domains. Terra firme forest was the richest vegetation type (195 spp.; 89% of all records), and corticolous species predominated (194 spp.). Similarity analyses grouped Caxiuanã with 16 other Amazonian lowland areas, whereas four mountainous areas formed a distinct group. Floristic composition was associated with mean temperature of the wettest quarter and precipitation of the coldest quarter. These findings highlight the importance of spatial and climatic variation in conservation planning and reinforce the role of bryophytes as bioindicators of forest functioning.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"98 4","pages":"e20260163"},"PeriodicalIF":1.2,"publicationDate":"2026-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149340375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Homogeneous pre-foliations of co-degree one and degree four on the projective plane. 射影平面上共一次和共四次的齐次预叶。

IF 1.2 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2026-11-02 eCollection Date: 2026-01-01 DOI: 10.1590/0001-3765202620260388

Carla Pracias, Maycol F Luza

引用次数: 0

Aerial parts of Stevia: extraction model, adjuvant potential in metabolic syndromes and bacteriostatic effect. 甜菊叶的空中部分：提取模型，代谢综合征的辅助作用和抑菌作用。

IF 1.2 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2026-10-30 eCollection Date: 2026-01-01 DOI: 10.1590/0001-3765202620250544

Paulo Leonardo M Siciliano, Cynthia Letícia S Cabeça, Natani Caroline Nogueira, Milena K Enokida, Adan R DE Oliveira, Oscar Oliveira Santos, Patricia Daniele S Santos, Isabela Maria R Paulino, Marcos Antonio Matiucci, Bianca R DE Albuquerque, Tânia C S P Pires, Adriana K Molina, Ana Borges, Antonio Sergio Dacome, Silvio Claudio DA Costa, Paula G M Fernandes

{"title":"Aerial parts of Stevia: extraction model, adjuvant potential in metabolic syndromes and bacteriostatic effect.","authors":"Paulo Leonardo M Siciliano, Cynthia Letícia S Cabeça, Natani Caroline Nogueira, Milena K Enokida, Adan R DE Oliveira, Oscar Oliveira Santos, Patricia Daniele S Santos, Isabela Maria R Paulino, Marcos Antonio Matiucci, Bianca R DE Albuquerque, Tânia C S P Pires, Adriana K Molina, Ana Borges, Antonio Sergio Dacome, Silvio Claudio DA Costa, Paula G M Fernandes","doi":"10.1590/0001-3765202620250544","DOIUrl":"https://doi.org/10.1590/0001-3765202620250544","url":null,"abstract":"This study investigated hydroethanolic extracts (70:30 v/v) from leaves and stems of Stevia rebaudiana (UEM-13 variety), obtained by Soxhlet and Shaker extraction, focusing on bioactive properties. UHPLC-MS/MS and FTIR characterization identified phenolic and sweetening compounds. Both extracts exhibited significant antioxidant activity in DPPH, TBARS, OxHLIA, and ORAC assays. Soxhlet extraction was more effective in preserving phytochemicals and inhibiting α-amylase, whereas Shaker extraction showed greater pancreatic lipase inhibition. Both extracts demonstrated antimicrobial activity against pathogenic and foodborne bacteria, as well as antifungal effects. These findings highlight Stevia biomass as a promising source of compounds with antioxidant, antidiabetic, antilipid, and antimicrobial potential.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"98 4","pages":"e20250544"},"PeriodicalIF":1.2,"publicationDate":"2026-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149340374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-hormone female rats exposed to crack cocaine exhibit behavioral alterations accompanied by changes in brain serotonin immunoreactivity. 暴露于快克可卡因的高激素雌性大鼠表现出行为改变，并伴有脑血清素免疫反应性的变化。

IF 1.2 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2026-10-30 eCollection Date: 2026-01-01 DOI: 10.1590/0001-3765202620260048

Barbara A Rosário, Daniel Vitor DE Souza, Jéssica A Lemes, Luciana Lesueur-Maluf, Daniel Araki Ribeiro, Milena B Viana

{"title":"High-hormone female rats exposed to crack cocaine exhibit behavioral alterations accompanied by changes in brain serotonin immunoreactivity.","authors":"Barbara A Rosário, Daniel Vitor DE Souza, Jéssica A Lemes, Luciana Lesueur-Maluf, Daniel Araki Ribeiro, Milena B Viana","doi":"10.1590/0001-3765202620260048","DOIUrl":"https://doi.org/10.1590/0001-3765202620260048","url":null,"abstract":"Crack cocaine induces marked behavioral and neurobiological alterations, including neuropsychiatric symptoms, with sex-dependent differences. This study examined the effects of crack cocaine in female rats in different phases of their estrous cycle. Animals were exposed to crack cocaine (100 mg) for five consecutive days and subsequently either euthanized for plasma cocaine and metabolite quantification or tested in the elevated T-maze (ETM, for avoidance and escape behaviors, related to generalized anxiety and panic disorder, respectively) and in an arena for locomotor activity evaluation (lines crossed). Given the role of serotonin (5-HT) in reward and anxiety/panic regulation, ΔFosB immunoreactivity was analyzed in serotonergic neurons of the dorsal raphe (DR). Plasma cocaine and metabolite concentrations did not differ across estrous cycle phases. Females in metestrus and diestrus showed no behavioral or immunohistochemical alterations following crack exposure. In contrast, proestrus females exhibited reduced avoidance, increased escape latencies, and enhanced locomotor activity, while estrus females showed decreased avoidance and increased locomotion. These effects were accompanied by reduced ΔFosB immunoreactivity in the lateral wings. Double immunoreactivity was increased in the region and in the ventral DR, but decreased in the dorsal DR. These findings reveal that DR neurons modulate crack-induced behavioral alterations in female rats.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"98 4","pages":"e20260048"},"PeriodicalIF":1.2,"publicationDate":"2026-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149340376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anais da Academia Brasileira de Ciências: past, present, and future. 巴西科学院年鉴：过去、现在和未来。

IF 1.2 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2026-10-26 eCollection Date: 2026-01-01 DOI: 10.1590/0001-3765202620260079

Concepta McManus, Abilio A Baeta Neves, Felipe Pimentel, Daniel Pimentel, Vanessa Peripolli, Vinícius Junqueira

{"title":"Anais da Academia Brasileira de Ciências: past, present, and future.","authors":"Concepta McManus, Abilio A Baeta Neves, Felipe Pimentel, Daniel Pimentel, Vanessa Peripolli, Vinícius Junqueira","doi":"10.1590/0001-3765202620260079","DOIUrl":"https://doi.org/10.1590/0001-3765202620260079","url":null,"abstract":"National flagship journals play a strategic yet often undervalued role in scientific systems outside the core centers of global knowledge production. This study analyzes the Annals of the Brazilian Academy of Sciences, Brazil's oldest continuously published scientific journal, to examine how long-standing multidisciplinary journals in emerging research systems navigate internationalization, evaluation regimes, and societal relevance. Using bibliometric and network analysis of Scopus and Web of Science data (1945-2025) we assess publication trends, thematic evolution, collaboration patterns, citation performance, and non-academic impact through policy and patent citations. Publication volume expanded sharply after 2000, alongside a complete transition to English and growing international collaboration, but citation impact remained modest relative to global multidisciplinary journals. Yet a substantial share of AABC Papers are cited in policy documents and patents across multiple countries, indicating relevance at the science-policy and science-technology interfaces. This discrepancy reflects structural limitations of conventional bibliometric indicators in capturing the contributions of nationally anchored, multidisciplinary journals. AABC occupies a hybrid position, supporting domestic scientific agendas while participating in global scholarly communication. The findings call for context-sensitive evaluation frameworks that recognize bibliodiversity, policy relevance, and the infrastructural role of national journals in emerging research systems.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"98 suppl 2","pages":"e20260079"},"PeriodicalIF":1.2,"publicationDate":"2026-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149294085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative study of gold nanoparticle synthesis routes using sodium citrate and tannic acid: Evaluation of biomedical applications. 柠檬酸钠和单宁酸合成金纳米粒子路线的比较研究：生物医学应用评价。

IF 1.2 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2026-10-26 eCollection Date: 2026-01-01 DOI: 10.1590/0001-3765202620250267

Taisa Lorene S Farias, Carlos Eduardo A Anzola, Jessica F Cunha, Ariamna Gandarilla, Thiago M DE Souza, Ivanildes Bastos, Yonny Romaguera-Barcelay, Mark D V Júnior, Karen Segala, Marcos M S Paula, Walter Ricardo Brito

{"title":"Comparative study of gold nanoparticle synthesis routes using sodium citrate and tannic acid: Evaluation of biomedical applications.","authors":"Taisa Lorene S Farias, Carlos Eduardo A Anzola, Jessica F Cunha, Ariamna Gandarilla, Thiago M DE Souza, Ivanildes Bastos, Yonny Romaguera-Barcelay, Mark D V Júnior, Karen Segala, Marcos M S Paula, Walter Ricardo Brito","doi":"10.1590/0001-3765202620250267","DOIUrl":"https://doi.org/10.1590/0001-3765202620250267","url":null,"abstract":"Gold nanoparticles (AuNPs) exhibit remarkable optical, electrical, and biological properties, making them highly desirable for biomedical applications. This study compared two distinct AuNPS synthesis routes: the Turkevich method, employing sodium citrate as a reducing agent, and a green synthesis method using tannic acid. UV-Vis spectroscopy and FTIR confirmed successful synthesis, revealing spherical, monodisperse AuNPs. Sodium citrate-synthesized AuNPs exhibited an average diameter of 19.40 ± 2.34 nm and demonstrated lower cytotoxicity, with cell viability of approximately 85.89%, suggesting suitability for drug delivery. In contrast, tannic acid-synthesized AuNPs had an average diameter of 9.56 ± 2.66 nm and reduced cell viability to approximately 40.56%, making them potential candidates for targeted anticancer therapies. Antibacterial assays revealed no significant activity for either type of AuNPs against tested bacteria, consistent with studies indicating that higher concentrations or larger particle sizes may be necessary for antibacterial effects. These findings emphasize the importance of tailoring AuNPs properties based on their intended biomedical use, with implications for enhancing sustainability and functionalization approaches.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"98 4","pages":"e20250267"},"PeriodicalIF":1.2,"publicationDate":"2026-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149294054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microplastics: Critical Evidence vs. Public Perception. 微塑料：关键证据vs.公众认知。

IF 1.2 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2026-10-26 eCollection Date: 2026-01-01 DOI: 10.1590/0001-3765202620260291

Sibele P Cestari

{"title":"Microplastics: Critical Evidence vs. Public Perception.","authors":"Sibele P Cestari","doi":"10.1590/0001-3765202620260291","DOIUrl":"https://doi.org/10.1590/0001-3765202620260291","url":null,"abstract":"To assess the reliability of current research on microplastics, this critical review evaluates the scientific soundness of pivotal studies influencing public and academic perceptions of this topic. A significant body of literature exhibits structural limitations, including conceptual fragilities, non-systematic theoretical frameworks, and a recurrent absence of expertise in polymer science, which collectively introduce analytical inaccuracies into both academic and media discourse. Although microplastics originate from the degradation of commodity polymers, they represent only about 1-3% of microparticles in the human body-rendering them substantially less prevalent than metallic or mineral particulates. Furthermore, empirical evidence demonstrating microplastic toxicity in humans remains unproven, and actual exposure levels are negligible. To ensure scientific credibility, future research must integrate interdisciplinary collaboration with polymer experts, apply rigorous analytical methods, and contextualize microplastics within the broader spectrum of microparticles. Adhering to ethical, evidence-based frameworks and objective methodological designs is essential to reinforce the analytical rigor of the field.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"98 suppl 2","pages":"e20260291"},"PeriodicalIF":1.2,"publicationDate":"2026-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149294100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a green nanoemulsion from the flavonoid-rich extract of Eugenia pruniformis for the control of the fasciolosis transmitter Lymnaea sp. 富黄酮类提取物绿色纳米乳剂的研制及防治片形虫病的研究。

IF 1.2 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2026-10-26 eCollection Date: 2026-01-01 DOI: 10.1590/0001-3765202620260063

Ricardo Diego D G DE Albuquerque, Adriana P Oliveira, Leonardo S Rangel, João Vitor C Batista, Francisco P Machado, José Augusto A Dos Santos, Robson Xavier, Leandro Rocha

{"title":"Development of a green nanoemulsion from the flavonoid-rich extract of Eugenia pruniformis for the control of the fasciolosis transmitter Lymnaea sp.","authors":"Ricardo Diego D G DE Albuquerque, Adriana P Oliveira, Leonardo S Rangel, João Vitor C Batista, Francisco P Machado, José Augusto A Dos Santos, Robson Xavier, Leandro Rocha","doi":"10.1590/0001-3765202620260063","DOIUrl":"https://doi.org/10.1590/0001-3765202620260063","url":null,"abstract":"Fasciolosis is one of the neglected tropical diseases, transmitted by the freshwater snails of the Lymnaea genus. In recent years, the control of these transmitters has been prioritized, and the search for effective and natural molluscicides aims to achieve a viable and eco-friendly alternative. In this sense, nanoemulsions are formulations that enhance the stability of active compounds, improve their delivery to their target site, and promote efficient dispersion of insoluble/immiscible substances. The development of a nanoemulsion containing a flavonoid-rich extract from Eugenia pruniformis for the biological control of Lymnaea sp. involved pre-formulation studies, as well as assessments of chemical and physicochemical stability. Biological assays evaluating the mortality of adult species of Lymnaea sp. upon contact with the most stable nanoemulsion during 72 h were performed. Additionally, the chemical composition of the extract was analyzed through UPLC-ESI-MS/MS, revealing a predominance of kaempferol, quercetin, and their derivatives, as well as gallic and ellagic tannins and chlorogenic acid isomers. The most stable formulation exhibited molluscicidal activity with LC₅₀/LC₉₀ values at 72 h of 20.38 ± 5.67 and 44.93 ± 9.06 ppm, respectively. These findings suggest the feasibility of employing a stable, active, biodegradable, and low-cost nanoformulation for the biological control of fascioliasis vectors.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"98 4","pages":"e20260063"},"PeriodicalIF":1.2,"publicationDate":"2026-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149294059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of abiotic variables on DNA degradation in a limnic environment. 湖泊环境中非生物变量对DNA降解的影响。

IF 1.2 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2026-10-26 eCollection Date: 2026-01-01 DOI: 10.1590/0001-3765202620250180

Ana Paula S Bertão, Raissa Vitória V Leite, Aline Horodesky, Camila Duarte Ritter, Paula Valeska Stica, Fabricio S Vidal, Otto Samuel Mader Netto, Marcio R Pie, Thiago Luis Zanin, Gisela Geraldine Castilho-Westphal, Giorgi Dal Pont, Antonio Ostrensky

{"title":"Effects of abiotic variables on DNA degradation in a limnic environment.","authors":"Ana Paula S Bertão, Raissa Vitória V Leite, Aline Horodesky, Camila Duarte Ritter, Paula Valeska Stica, Fabricio S Vidal, Otto Samuel Mader Netto, Marcio R Pie, Thiago Luis Zanin, Gisela Geraldine Castilho-Westphal, Giorgi Dal Pont, Antonio Ostrensky","doi":"10.1590/0001-3765202620250180","DOIUrl":"https://doi.org/10.1590/0001-3765202620250180","url":null,"abstract":"Environmental DNA (eDNA) has emerged as a powerful tool for biodiversity monitoring, yet the environmental factors influencing its persistence and degradation remain poorly understood. This study assessed the effects of light intensity, water column depth, turbidity, transparency, temperature, and exposure time on eDNA persistence under field conditions in a limnic environment. Two experiments were conducted. Experiment I used bottles containing DNA extracts of Limnoperna fortunei, whereas Experiment II used bottles containing reservoir water with naturally occurring eDNA from Cordylophora sp. and L. fortunei. Sampling units consisted of sterile glass tubes subjected to two treatments: transparent tubes exposed to sunlight and tubes covered with black tape to block light. Units were arranged in triplicate and attached to a guide rope positioned vertically in the water column at different depths, remaining submerged for 24, 72, 168, and 264 hours. eDNA remained detectable after 12 days under varying environmental conditions, although degradation was most pronounced during the first 24 hours. The rapid breakdown of eDNA in aquatic habitats highlights its potential for near real-time biodiversity monitoring, suggesting that detected DNA primarily reflects recent biological activity. These findings contribute to understanding eDNA dynamics and may improve interpretation of detection results in freshwater monitoring.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"98 4","pages":"e20250180"},"PeriodicalIF":1.2,"publicationDate":"2026-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149294071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novelties in Cosmarium (Zygnematophyceae, Desmidiaceae): a replacement name, a new synonym, and two new species from an Atlantic Forest Remnant. 海葵属（海葵科，海葵科）的新发现：一个替代名、一个新同义词和来自大西洋森林遗迹的两个新种。

IF 1.2 4区综合性期刊

Anais da Academia Brasileira de Ciencias Pub Date : 2026-10-26 eCollection Date: 2026-01-01 DOI: 10.1590/0001-3765202620250279

Bruna Fadul-Souza, Carlos Wallace N Moura, Geraldo José P Ramos

{"title":"Novelties in Cosmarium (Zygnematophyceae, Desmidiaceae): a replacement name, a new synonym, and two new species from an Atlantic Forest Remnant.","authors":"Bruna Fadul-Souza, Carlos Wallace N Moura, Geraldo José P Ramos","doi":"10.1590/0001-3765202620250279","DOIUrl":"https://doi.org/10.1590/0001-3765202620250279","url":null,"abstract":"Desmids comprise a diverse group of green algae inhabiting freshwater ecosystems. Among the main genera is the genus Cosmarium (Desmidiaceae, Zygnematophyceae), which has several species, including problematic taxa in terms of nomenclature or even unknown to science. In this paper, we propose two new species of Cosmarium, a replacement name, and a new synonym based on material collected in Serra do Conduru State Park (PESC), Bahia, Brazil. Periphytic and planktonic samples were collected in a pond from PESC, which is part of the Atlantic Forest Biome. As a result, Cosmarium moniliforme var. indentatum nom. inval. has been validated under a new name at the species level (C. pseudomoniliforme nom. & stat. nov.), and Cosmarium inaequalinotatum has been regarded as a heterotypic synonym of C. crenatiforme. In addition, we propose two new species, C. conduruense and C. pataxoum, expanding the knowledge of diversity within this genus. Overall, our results reinforce the Atlantic Forest as a hotspot of hidden desmid diversity and underscore the need for continued taxonomic investigation in understudied tropical ecosystems.","PeriodicalId":7776,"journal":{"name":"Anais da Academia Brasileira de Ciencias","volume":"98 4","pages":"e20250279"},"PeriodicalIF":1.2,"publicationDate":"2026-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149294079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0