Journal of Phycology最新文献

{"title":"Epitypification of Lyngbya confervoides C.Agardh ex Gomont (Cyanobacteria) after two centuries of troubled taxonomy and the description of Okeania gaditana sp. nov.","authors":"Forrest W. Lefler,&nbsp;David E. Berthold,&nbsp;Jéssica A. S. Moretto,&nbsp;H. Dail Laughinghouse IV","doi":"10.1111/jpy.70206","DOIUrl":"10.1111/jpy.70206","url":null,"abstract":"<p>The cyanobacterial genus <i>Lyngbya</i> was once thought to be a cosmopolitan genus, inhabiting nearly every biome across the globe. However, utilization of genetic, and more recently genomic, sequencing has revealed that this morphologically homogenous taxon in fact comprises distinct evolutionary clades, leading to the plethora of newly described Cyanobacterial genera split from <i>Lyngbya</i>. Despite this, no comparisons can be made to <i>L. confervoides</i>, and thus begging the question: who is <i>Lyngbya</i>? To answer this, we collected cyanobacterial tufts from intertidal pools in Cádiz, Spain, in line with the original descriptions of <i>L. confervoides</i> from Agardh and Gomont. Morphological and genetic characterization were conducted on two <i>Lyngbya</i>-like strains isolated from the type location. We identified strain BLCC-M349 to match the original description and iconograph, thereby designating it as the epitype of <i>L. confervoides</i> with BLCC-M349 serving as the reference strain. The descriptions of both <i>Lyngbya</i> and <i>L. confervoides</i> are emended and sequences of the 16S rRNA gene, the 16S-23S ITS rRNA region, and the genome are provided. Additionally, we describe a novel species of <i>Okeania</i> as well as synonymize select species of <i>Capilliphycus</i> to <i>Lyngbya</i>.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"62 5","pages":"1579-1596"},"PeriodicalIF":4.3,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148536242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Description of Flavicapitulum gen. nov. and two new species of Marmoreocelis from thermal habitats in the Americas","authors":"Jeffrey R. Johansen,&nbsp;Jan Pokorný,&nbsp;Radka Hauerová,&nbsp;Jan Kaštovský","doi":"10.1111/jpy.70212","DOIUrl":"10.1111/jpy.70212","url":null,"abstract":"<p>Three novel taxa in the Coleofasciculales were observed in hot springs in Yellowstone National Park, Wyoming, United States, and in the Tabaconcito thermal springs on the Rio Tabacón in Costa Rica. <i>Flavicapitulum vaporiphilum</i> gen. et sp. nov. was located in a supported clade with <i>Gracilinea</i> and <i>Marmoreocelis.</i> It is genetically distant from <i>Marmoreocelis</i>, but genetic separation from <i>Gracilinea</i> is ambiguous based on percent identity of the 16S rRNA gene. However, <i>Flavicapitulum</i> forms a phylogenetically supported monophyletic clade and is ecologically distinct from both other genera by inhabiting fumaroles. It is further distinguished by the possession of yellowish apices in mature trichomes. <i>Marmoreocelis minervensis</i> sp. nov. is distinguished from the type species by habitat preference (hot springs vs. biological soil crusts) and phylogeny and belongs to a large clade containing many other uncultured hot spring Cyanobacteria. <i>Marmoreocelis tabaconcitensis</i> sp. nov. was represented by a single strain isolated from a hot spring in Costa Rica. This study demonstrated that the resolution of the two families in the Coleofasciculales is unclear. Placement based on genomic phylogenies in the last major revision of cyanobacterial taxonomy is not in agreement with the phylogeny based on the 16S rRNA gene of this study. A synapomorphy defining the supported clade containing <i>Wilmottia</i> is the presence of only a single tRNA gene, tRNA^Ile, in the 16S–23S ITS rRNA region. <i>Coleofasciculus</i> contains two tRNA genes in its ITS rRNA region, tRNA^Ile and tRNA^Ala. This difference in ITS rRNA regions as well as the 16S rRNA gene phylogeny support tentative placement of <i>Flavicapitulum, Gracilinea</i>, and <i>Marmoreocelis</i> in Wilmottiaceae at present.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"62 5","pages":"1564-1578"},"PeriodicalIF":4.3,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.70212","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148604381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling of the geographical distribution of two forest-forming fucoids in the Strait–Alboran demarcation (southern Iberian Peninsula): Implications for conservation and restoration","authors":"Pablo Pérez-Castro,&nbsp;Elena Bañares-España,&nbsp;Antonio Flores-Moya,&nbsp;Ignacio J. Melero-Jiménez","doi":"10.1111/jpy.70209","DOIUrl":"10.1111/jpy.70209","url":null,"abstract":"<p>Marine forests formed by canopy-forming brown algae of the former <i>Cystoseira</i> complex are key habitat-forming components of Mediterranean coastal ecosystems, supporting biodiversity and multiple ecosystem functions. However, many populations have declined in recent decades due to increasing anthropogenic pressures and climate change, raising concerns about the persistence of these foundational species. Identifying the environmental drivers that shape their distribution is therefore essential for predicting future changes and guiding conservation actions. Here, we applied species distribution models to evaluate the environmental determinants, present habitat suitability, and potential future distribution of two emblematic fucoid species, <i>Gongolaria usneoides</i> and <i>Ericaria selaginoides</i>, in the Strait of Gibraltar–Alboran Sea region, a major Mediterranean biodiversity hotspot and climatic transition zone. Present-day models were projected to the end of the century under two contrasting climate scenarios (SSP1-1.9 and SSP5-8.5). Mixed layer depth was the dominant predictor structuring species distributions, highlighting the role of water column stratification and hydrographic dynamics in regulating benthic habitats. The two species exhibited contrasting responses: <i>Gongolaria usneoides</i> occupied a narrow environmental niche and showed spatially heterogeneous future responses, including localized suitability increases around the Strait of Gibraltar and western Alboran sectors together with suitability declines across portions of the eastern coastline under both climate scenarios. In contrast, <i>Ericaria selaginoides</i> showed broader environmental tolerance and generally positive, although spatially heterogeneous, suitability responses across large portions of the region. These results suggest that future environmental change may restructure Mediterranean marine forests through species-specific responses rather than through uniform decline.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"62 5","pages":"1606-1617"},"PeriodicalIF":4.3,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.70209","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148630234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Different iron availability to two marine diatoms revealed by different iron-uptake strategies","authors":"Tianhao Chen,&nbsp;Xinshi Feng,&nbsp;Anqi Zhang,&nbsp;Yu Liu,&nbsp;Liangliang Kong","doi":"10.1111/jpy.70204","DOIUrl":"10.1111/jpy.70204","url":null,"abstract":"<p>In the open ocean, extremely low iron (Fe) concentrations limit the growth of marine phytoplankton. To cope with Fe scarcity and its diverse chemical forms in seawater, phytoplankton have evolved distinct uptake strategies. Here, we compared two low-Fe-adapted diatoms, <i>Thalassiosira oceanica</i> and <i>Phaeodactylum tricornutum</i>, to assess the bioavailability of unchelated Fe and siderophore-bound forms, as well as their underlying Fe-uptake strategies. Growth inhibition assays with bathophenanthroline disulfonic acid (BPDS) indicated that both species acquired unchelated Fe at environmentally relevant concentrations by reductive pathways in which Fe(III) was reduced to Fe(II) prior to internalization. In contrast, their responses to hydroxamate siderophores, desferrioxamine B (DFB) and ferrichrome (FCH), diverged: <i>P. tricornutum</i> maintained substantial growth and Fe-uptake rates when reductive pathways were inhibited, consistent with a receptor-mediated non-reductive Fe-uptake pathway, whereas <i>T. oceanica</i> relied predominantly on reductive processes and transported FeDFB and FeFCH at much lower rates. These differences suggest that <i>P. tricornutum</i> may gain a competitive advantage in hydroxamate siderophore-rich waters. Overall, the diverse Fe-acquisition strategies among marine phytoplankton may determine their ecological success and spatial distribution in the ocean.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"62 5","pages":"1494-1509"},"PeriodicalIF":4.3,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148471352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The consequences of partial clonality on the spatiotemporal genetic structure of the red alga Chondria tumulosa (Ceramiales, Rhodophyta)","authors":"Taylor M. Williams,&nbsp;Heather L. Spalding,&nbsp;Solenn Stoeckel,&nbsp;Brian B. Hauk,&nbsp;Jonathan Plissner,&nbsp;Randall K. Kosaki,&nbsp;Stacy A. Krueger-Hadfield","doi":"10.1111/jpy.70214","DOIUrl":"10.1111/jpy.70214","url":null,"abstract":"<p>The relative rates of sexual versus clonal reproduction partition genetic diversity, but the quantification of these rates remains limited in natural populations. This knowledge gap is particularly acute among tropical macroalgae. <i>Chondria tumulosa</i> is a red macroalga that has been documented at high abundance in the three northernmost atolls in the Papahānaumokuākea Marine National Monument. We sampled thalli at Manawai (2021, 2023), at Kuaihelani (2022, 2023), and at Hōlanikū (2023) to characterize the reproductive mode and patterns of gene flow. Tetrasporophytes overwhelmingly dominated, although eight cystocarpic female gametophytes (&lt;1%) were documented. We observed evidence of very high clonal rates, accompanied by an increase in homozygosity. Surprisingly, our temporal analyses suggested site-specific trends in the predominance of selfing, outcrossing, or clonality. A very small haploid proportion combined with high genetic drift rendered temporal analyses of genotypic frequencies challenging to implement and interpret, such that point estimates were a better reflection of reproductive mode variation. Genetic differentiation increased with geographic distance, with strong temporal and spatial structure. The reduced genetic diversity, decreasing heterozygosity over time, and high spatial and temporal genetic discontinuities combined with the dominance of tetrasporophytes suggest a recent introduction of <i>C. tumulosa</i> in this region, possibly via marine debris rather than a regional opportunistic species undergoing population eruptions. Future studies should focus on identifying the native range to document the ecological and evolutionary shifts that have facilitated the rapid increase and spread of <i>C. tumulosa</i> and its potential similarities to other invasive haploid-diploid algae.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"62 5","pages":"1536-1563"},"PeriodicalIF":4.3,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.70214","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148604384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Giant kelp (Macrocystis pyrifera) gametophytes grow endophytically in red macroalgae: Implications for kelp restoration","authors":"Tamzin Gannon,&nbsp;Wouter Visch,&nbsp;Christopher P. Burridge,&nbsp;Adam Smolenski,&nbsp;Sharee McCammon,&nbsp;Ellen Gunn,&nbsp;Jeffrey T. Wright,&nbsp;Catriona L. Hurd,&nbsp;Scott Bennett","doi":"10.1111/jpy.70210","DOIUrl":"10.1111/jpy.70210","url":null,"abstract":"<p>Giant kelp (<i>Macrocystis pyrifera</i>) forests have declined by 95% in Australia since the 1970s due to climate change. Despite expanding restoration efforts, long-term recovery is still lacking. Factors influencing recruitment by the microscopic gametophyte phase may represent a key mechanism underpinning the successful recovery and restoration of <i>M. pyrifera</i>. In the northern hemisphere, kelp gametophytes grow epiphytically and endophytically in red macroalgae and may represent an important “propagule bank” for kelp gametophyte recruitment. Our goal was to determine if <i>M. pyrifera</i> recruitment might depend on endo- or epiphytic gametophyte growth with understory red macroalgae on reefs in Tasmania, Australia. We first examined the composition and biomass of understory macroalgae living under kelp forests in Tasmania. We then tested if <i>M. pyrifera</i> gametophytes were located epiphytically or endophytically within specific red macroalgal hosts of 13 common species. Digital polymerase chain reaction (PCR) with <i>M. pyrifera</i> primers found <i>M. pyrifera</i> gametophytes in eight species of red macroalgae (<i>Ballia callitricha</i>, <i>Gloiocladia halymenioides</i>, <i>Halopeltis australis</i>, <i>Phacelocarpus pepperocarpos</i>, <i>Plocamium angustum</i>, <i>Plocamium dilatatumi</i>, <i>Ptilonia australasica</i>, and <i>Ptilonia subulifera</i>), with <i>Ballia callitricha</i> being the most common host (66.7% positive detections). By sterilizing the surface of host tissue, the detection of <i>M. pyrifera</i> DNA was consistent with endophytic occurrence of kelp gametophytes within the red macroalgal hosts but did not exclude the possibility that they also live epiphytically. These results suggest that red macroalgae may provide an important propagule bank for <i>M. pyrifera</i> gametophytes, and maintaining healthy understory assemblages may facilitate recovery and restoration efforts of <i>M. pyrifera</i>.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"62 5","pages":"1633-1644"},"PeriodicalIF":4.3,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.70210","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148562252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 and phylogenetic analyses support the establishment of the new genus Neoverlaquea gen. nov. (Rhodophyta, Ceramiales, Rhodomelaceae) for the Mediterranean Polysiphonia sertularioides","authors":"Donatella Serio,&nbsp;Giovanni Furnari,&nbsp;Isabella Moro,&nbsp;Katia Sciuto","doi":"10.1111/jpy.70223","DOIUrl":"10.1111/jpy.70223","url":null,"abstract":"<p>Within the family Rhodomelaceae several taxa exhibit significant cryptic diversity and high phenotypic plasticity, requiring the employment of molecular data for the accurate delimitation of genera and species. Among these, the genus <i>Polysiphonia</i> sensu lato has been demonstrated to be polyphyletic, and several new genera have been separated from it over time. This study focuses on <i>Polysiphonia sertularioides</i>, a species with apparently worldwide distribution and a still uncertain taxonomic position. Indeed, previous molecular studies have indicated cryptic diversity within this species and the distinction of several <i>P. sertularioides</i> lineages within the family Rhodomelaceae. Aimed at resolving the taxonomic status of <i>P. sertularioides</i>, morphological and molecular analyses (<i>rbc</i>L and <i>cox</i>1 genes) were carried out on specimens attributable to this taxon and collected from the Mediterranean Sea, including sites near the probable type locality. The obtained results highlight that the Mediterranean <i>P. sertularioides</i> specimens form a phylogenetically well-supported clade, clearly separated from <i>Polysiphonia</i> sensu stricto and from the other Rhodomelacean genera so far described. This result allowed us to propose the establishment of the new genus <i>Neoverlaquea</i> and the new combination <i>Neoverlaquea sertularioides</i> to encompass this group of specimens. Detailed observation of <i>Neoverlaquea</i> morpho-reproductive characters and comparison with the <i>P</i>. <i>sertularioides</i> descriptions published so far allowed us also to find the unique phenotypic traits characterizing this new genus. Moreover, our phylogenetic results confirmed the existence of several phylogenetically distinct extra-Mediterranean lineages morphologically attributed to <i>P. sertularioides</i>, which require further investigation to be correctly identified.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"62 5","pages":"1461-1477"},"PeriodicalIF":4.3,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148813390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ecophysiological responses of boreal-temperate Atlantic kelp at their equatorial range limit","authors":"Tomás F. Pinheiro,&nbsp;Silvia Chemello,&nbsp;Isabel Sousa-Pinto,&nbsp;Tânia R. Pereira","doi":"10.1111/jpy.70216","DOIUrl":"10.1111/jpy.70216","url":null,"abstract":"<p>Portuguese kelp forests are the southernmost stronghold of boreal-temperate species in the Eastern North Atlantic, forming a key biogeographic boundary under rapid ocean warming. Within these forests, species such as <i>Laminaria hyperborea</i> and <i>Saccharina latissima</i> occupy distinct depth ranges, yet the physiological mechanisms underlying this zonation remain unclear. We compared their responses to temperature and light to test whether adult ecophysiology contributes to their vertical distribution and may also influence their latitudinal range limits. Both species displayed high tolerance to short-term thermal stress, maintaining positive net photosynthesis up to 30°C. <i>Saccharina latissima</i> showed moderate reductions in photosynthetic efficiency and productivity at this temperature, whereas <i>L. hyperborea</i> remained largely unaffected. Both species exhibited low light requirements, consistent with their persistence in deeper habitats. These results suggest that adult thermal and light tolerance alone do not constrain current distributions. However, processes acting at other life stages, such as reproduction, recruitment, habitat availability and other ecological drivers, are likely more influential in setting biogeographical and vertical range limits. These insights suggest that future changes in species dominance and community composition in southern kelp forests will be driven by shifts in ecological interactions and life-cycle dynamics, rather than by direct physiological constraints.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"62 5","pages":"1645-1655"},"PeriodicalIF":4.3,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148630263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genomic analyses of giant kelp reveal restricted connectivity across the Southern Hemisphere and striking diversity in Aotearoa (New Zealand)","authors":"Xiaoyue Pluto Liu,&nbsp;Alana Alexander,&nbsp;Narissa Bax,&nbsp;Donna Bond,&nbsp;Ceridwen I. Fraser","doi":"10.1111/jpy.70220","DOIUrl":"10.1111/jpy.70220","url":null,"abstract":"<p>The macroalga <i>Macrocystis pyrifera</i> (“giant” or “bladder” kelp) plays a vital role in cold-temperate marine ecosystems but faces increasing threats from ongoing environmental change. Understanding its population diversity and connectivity is essential for predicting future range shifts and assessing the ecological consequences of such shifts in both present and novel ranges. Here, we used high-resolution genotyping-by-sequencing (GBS) to investigate the population structure of <i>M. pyrifera</i> within and among populations in Aotearoa (New Zealand), Lutruwita (Tasmania), and Falkland Islands/Malvinas. Our results showed New Zealand and Tasmanian populations are more closely related to each other than to those from the Falklands, consistent with isolation by distance. Fine-scale population structure was detected within each of the three regions, especially New Zealand, where we could pinpoint genetically unique populations down to tens of kilometers. Our research provides insights on fine-scaled giant kelp diversity and connectivity patterns across three regions in the Southern Hemisphere, which contrast with previous studies that used traditional genetic markers, and will aid future conservation of this ecologically and economically important taxon.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"62 5","pages":"1618-1632"},"PeriodicalIF":4.3,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.70220","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148794692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Taxonomic advancements in the Calotrichaceae: Resolving phylogenetic ambiguities and describing five novel species of Dulcicalothrix from the Konkan region of India.","authors":"Harsh Pant, Prashant Singh","doi":"10.1111/jpy.70237","DOIUrl":"https://doi.org/10.1111/jpy.70237","url":null,"abstract":"<p><p>The taxonomy of heteropolar, tapering, and unbranched heterocytous cyanobacteria has undergone significant changes over time. Several novel species, genera, and families have been established using a polyphasic approach, which has provided a greater resolution in the systematics of these organisms. The Calotrichaceae, as of today, stands as a well-resolved and monophyletic clade with at least five genera. The family has had some major revisions as well as additions. In addition, parameters such as the comparison of the 16S-23S ITS rRNA regions for the separation of one species from another have also grown and evolved and been amended recently within the genus Dulcicalothrix of the family Calotrichaceae. This approach has created the need to compare orthologous 16S-23S ITS rRNA region operons for better resolution at the species level. This study reviews the taxonomic advancements within the family Calotrichaceae with a discussion on the taxonomic status of the ambiguous positioning of the genus Neocalothrix and Phayaothrix. Considering the illegitimate status of Neocalothrix based on morphological, ecological, molecular, and phylogenetic evidence and the rules and recommendations of the International Code of Nomenclature for Algae, Fungi, and Plants, we have hereby transferred Neocalothrix to the existing genus Fulbrightiella and describe five novel species of Dulcicalothrix, viz. D. epiphytica, D. tripathii, D. acuminata, D. bombayensis, and D. goaensis from the Konkan region of India identified using a polyphasic approach.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149137433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}