Plant and Fungal Systematics最新文献

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The lichenized genus Cora (Basidiomycota: Hygrophoraceae) in Mexico: high species richness, multiple colonization events, and high endemism 墨西哥地衣菌属Cora(担子菌科:湿菌科):物种丰富度高、多次定殖事件和高度地方性
Plant and Fungal Systematics Pub Date : 2019-12-01 DOI: 10.2478/pfs-2019-0026
B. Moncada, R. Pérez‐Pérez, R. Lücking
{"title":"The lichenized genus Cora (Basidiomycota: Hygrophoraceae) in Mexico: high species richness, multiple colonization events, and high endemism","authors":"B. Moncada, R. Pérez‐Pérez, R. Lücking","doi":"10.2478/pfs-2019-0026","DOIUrl":"https://doi.org/10.2478/pfs-2019-0026","url":null,"abstract":"Abstract In a continued effort to catalog the numerous phylogenetically detected and predicted species of Cora in the Americas, we focus here on the diversity of the genus in Mexico and the phylogenetic relationships of the taxa present in this area. Based on previous results and new collections, 12 taxa are recognized in Mexico, including eight new species and one new subspecies. The 12 taxa form 11 unrelated lineages within the genus, indicating multiple independent colonization from Central and South America. While the new subspecies is nested within a species known from the northern Andes in South America, the other species are all putative endemics for Mexico, resulting in endemism of 92% at species level and 100% at taxon level. Considering the rather narrow area of origin of the sequenced specimens in southeastern Mexico and the previously documented range of Cora including the northwestern part of the country, plus the underlying topography, we predict that the 12 species and subspecies now known represent only about 20% of the total richness of Cora in the country, and that many more endemic lineages are to be found in the western and northwestern parts (Sierra Madre Occidental). The new taxa from Mexico formally introduced in this study are Cora benitoana sp. nov., with a strongly projecting, cyphelloid hymenophore; C. buapana sp. nov., with elongate, finger-like and partly branched appendages on the lower medullary hyphae; C. dewisanti subsp. mexicana subsp. nov., with a marginally protruding hymenophore; C. guzmaniana sp. nov., with a partly setose lobe surface; C. ixtlanensis sp. nov., a phenotypically cryptic species similar but unrelated to C. terrestris; C. lawreyana sp. nov., with globose hyphal appendages; C. marusae sp. nov., a phenotypically cryptic species similar but unrelated to C. comaltepeca; C. totonacorum sp. nov., a phenotypically cryptic species similar but phylogenetically distant to C. davidia; and C. zapotecorum sp. nov., with a very thinly pilose lobe surface.","PeriodicalId":52151,"journal":{"name":"Plant and Fungal Systematics","volume":"64 1","pages":"393 - 411"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41814834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Lichen species as element bioindicators for air pollution in the eastern United States of America 地衣物种作为美国东部空气污染的元素生物指标
Plant and Fungal Systematics Pub Date : 2019-12-01 DOI: 10.2478/pfs-2019-0015
S. Will-Wolf, Sarah E. Jovan
{"title":"Lichen species as element bioindicators for air pollution in the eastern United States of America","authors":"S. Will-Wolf, Sarah E. Jovan","doi":"10.2478/pfs-2019-0015","DOIUrl":"https://doi.org/10.2478/pfs-2019-0015","url":null,"abstract":"Abstract Lichen element (N, S, metals) indicators of local air pollution load (a widely used technique) are recommended for five predefined regions covering central and southern parts of the eastern United States. The final recommendations integrate the advice of regional lichenologists, information from regional floras, and species abundance data from a United States Forest Service Forest Inventory and Analysis Program (FIA) lichen database for 11 of the 21 covered eastern states. Recommended species were frequent in their region, easy for nonspecialists to distinguish in the field after training, and easy to handle using clean protocols. Regression models of species abundance in FIA plots from five southeastern states vs. climate, air pollution (both from a regional lichen response model) and type of nearby landcover (from the National Land Cover Database) identified species’ environmental limitations. Punctelia rudecta is recommended for cooler forested uplands of all regions, with three Physcia species combined and Punctelia missouriensis for isolated woodlands or urban areas of three regions. Parmotrema hypotropum and P. hypoleucinum combined (weak environmental limitation) or P. perforatum. and P. subrigidum combined (limited in more polluted areas) are recommended for warmer Coastal Plains in two regions each. Additional species are recommended for single regions. Each species must be quantitatively evaluated in each region, to demonstrate indication reliability in practice and to calculate element data conversions between species for region-wide bioindication.","PeriodicalId":52151,"journal":{"name":"Plant and Fungal Systematics","volume":"64 1","pages":"137 - 147"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46878684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
A first synopsis of lichenicolous fungi of Mongolia, with the description of five new species 蒙古地衣真菌首次概述,附五新种描述
Plant and Fungal Systematics Pub Date : 2019-12-01 DOI: 10.2478/pfs-2019-0023
M. Zhurbenko, Ochirbat Enkhtuya, Samiya Javkhlan
{"title":"A first synopsis of lichenicolous fungi of Mongolia, with the description of five new species","authors":"M. Zhurbenko, Ochirbat Enkhtuya, Samiya Javkhlan","doi":"10.2478/pfs-2019-0023","DOIUrl":"https://doi.org/10.2478/pfs-2019-0023","url":null,"abstract":"Abstract A first synopsis of lichenicolous fungi of Mongolia based on new collections and literature data is provided, including 114 species. Five new species are described: Capronia cogtii (on Vahliella leucophaea), Echinothecium hypogymniae (on Hypogymnia bitteri), Feltgeniomyces mongolicus (on H. bitteri), Phacopsis vulpicidae (on Vulpicida juniperina) and Roselliniella javkhlanae (on Rinodina turfacea var. ecrustacea). Two new combinations are proposed: Endococcus hafellneri (≡ Stigmidium hafellneri) and Sphaerellothecium taimyricum (≡ Sphaerellothecium thamnoliae var. taimyricum). Unidentified specimens of Acremonium (on Mycoblastus sanguinarioides), Cercidospora (on Rhizoplaca chrysoleuca s.lat.), Didymocyrtis (on Rhizoplaca chrysoleuca s.lat.), Lichenochora (on Physcia alnophila), Lichenostigma (on species of Xanthoparmelia), Phoma (on Vulpicida juniperina) and a leotialean fungus (on Cetraria laevigata) are characterized and discussed. Taxonomic notes are provided for Cercidospora macrospora s.lat., Didymocyrtis cf. melanelixiae, Minutoexcipula cf. beaglei, Nesolechia cetrariicola, Sphaerellothecium cf. parmeliae and Stigmidium cf. psorae. Sphaeropezia intermedia is newly reported for Eurasia. Didymocyrtis grumantiana is newly reported for Asia. Additionally, 71 species of lichenicolous fungi and five species of lichenicolous lichens are documented in Mongolia for the first time. Allocetraria is reported as a new host genus for Abrothallus peyritschii, Vulpicida for Arthonia triebeliae, and Anamylopsora for Muellerella pygmaea.","PeriodicalId":52151,"journal":{"name":"Plant and Fungal Systematics","volume":"64 1","pages":"345 - 366"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45484580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Differential responses to salt concentrations of lichen photobiont strains isolated from lichens occurring in different littoral zones 从不同海岸带地衣中分离的光生地衣菌株对盐浓度的差异反应
Plant and Fungal Systematics Pub Date : 2019-12-01 DOI: 10.2478/pfs-2019-0016
F. Gasulla, A. Guéra, A. de los Ríos, S. Pérez‐Ortega
{"title":"Differential responses to salt concentrations of lichen photobiont strains isolated from lichens occurring in different littoral zones","authors":"F. Gasulla, A. Guéra, A. de los Ríos, S. Pérez‐Ortega","doi":"10.2478/pfs-2019-0016","DOIUrl":"https://doi.org/10.2478/pfs-2019-0016","url":null,"abstract":"Abstract An interesting biota of lichen-forming fungi occurs along rocky seashores of cold and warm-temperate regions in both hemispheres. Most of the species belong to the family Verrucariaceae and form symbioses with an extraordinarily diverse group of photobionts. We isolated the photobionts of three species: Hydropunctaria maura and H. amphibia from the supralittoral zone, and Wahlenbergiella striatula from the upper intertidal zone. We characterized the isolated strains structurally by means of transmission electron microscopy, and molecularly using the nrSSU and nrITS and chloroplast RPL10A regions. Additionally, we studied the response of the strains to different salt concentrations, analyzed the concentration of osmoregulatory solutes, and measured photosynthesis performance by chlorophyll fluorescence and CO2 assimilation techniques. All strains belong to the recently described species Halofilum ramosum, although we found differences in the ITS and RPL10A regions among the strains shared by H. maura and H. amphibia and the strain isolated from W. striatula. Differences were also found in the main osmoregulatory response of the strains growing under high salt concentrations: W. striatula accumulated glycerol, while H. maura and H. amphibia synthetized sucrose. Analyses of photosynthesis performance also indicated differences in physiological behavior between supralittoral-dwelling and intertidal-dwelling species, W. striatula showing lower photosynthetic activity under high irradiance. Our results highlight the role of photobionts in determining lichen zonation on rocky seashores.","PeriodicalId":52151,"journal":{"name":"Plant and Fungal Systematics","volume":"64 1","pages":"149 - 162"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47364045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Lepraria juanfernandezii, a new lichen species from the Southern Hemisphere juanfernandezii Lepraria,一种来自南半球的地衣新物种
Plant and Fungal Systematics Pub Date : 2019-12-01 DOI: 10.2478/pfs-2019-0019
M. Kukwa
{"title":"Lepraria juanfernandezii, a new lichen species from the Southern Hemisphere","authors":"M. Kukwa","doi":"10.2478/pfs-2019-0019","DOIUrl":"https://doi.org/10.2478/pfs-2019-0019","url":null,"abstract":"Abstract Lepraria juanfernandezii is described as a new species. It differs from all other species of Lepraria by its aggregate thallus with sparse prothallus hyphae, the absence of a hypothallus, the presence of divaricatic acid and the absence of zeorin, and its occurrence in the Southern Hemisphere. A key to all species of Lepraria containing divaricatic acid is given.","PeriodicalId":52151,"journal":{"name":"Plant and Fungal Systematics","volume":"64 1","pages":"233 - 235"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46806916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
James Donald (‛Jim’) Lawrey: a tribute to a unique career in lichenology 詹姆斯·唐纳德(“吉姆”)劳雷:对地衣学独特职业生涯的致敬
Plant and Fungal Systematics Pub Date : 2019-12-01 DOI: 10.2478/pfs-2019-0014
R. Lücking, Manuela Dal Forno, S. Will-Wolf
{"title":"James Donald (‛Jim’) Lawrey: a tribute to a unique career in lichenology","authors":"R. Lücking, Manuela Dal Forno, S. Will-Wolf","doi":"10.2478/pfs-2019-0014","DOIUrl":"https://doi.org/10.2478/pfs-2019-0014","url":null,"abstract":"International Ecology Mycologia Mycological Mycological Phytologist ,","PeriodicalId":52151,"journal":{"name":"Plant and Fungal Systematics","volume":"64 1","pages":"117 - 135"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47195173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Biodiversity assessment of ascomycetes inhabiting Lobariella lichens in Andean cloud forests led to one new family, three new genera and 13 new species of lichenicolous fungi 对安第斯云雾林地衣中生长的子囊菌进行生物多样性评价,发现地衣真菌1新科、3新属、13新种
Plant and Fungal Systematics Pub Date : 2019-12-01 DOI: 10.2478/pfs-2019-0022
A. Flakus, J. Etayo, J. Miadlikowska, F. Lutzoni, M. Kukwa, N. Matura, P. Rodriguez-Flakus
{"title":"Biodiversity assessment of ascomycetes inhabiting Lobariella lichens in Andean cloud forests led to one new family, three new genera and 13 new species of lichenicolous fungi","authors":"A. Flakus, J. Etayo, J. Miadlikowska, F. Lutzoni, M. Kukwa, N. Matura, P. Rodriguez-Flakus","doi":"10.2478/pfs-2019-0022","DOIUrl":"https://doi.org/10.2478/pfs-2019-0022","url":null,"abstract":"Abstract Neotropical mountain forests are characterized by having hyperdiverse and unusual fungi inhabiting lichens. The great majority of these lichenicolous fungi (i.e., detectable by light microscopy) remain undescribed and their phylogenetic relationships are mostly unknown. This study focuses on lichenicolous fungi inhabiting the genus Lobariella (Peltigerales), one of the most important lichen hosts in the Andean cloud forests. Based on molecular and morphological data, three new genera are introduced: Lawreyella gen. nov. (Cordieritidaceae, for Unguiculariopsis lobariella), Neobaryopsis gen. nov. (Cordycipitaceae), and Pseudodidymocyrtis gen. nov. (Didymosphaeriaceae). Nine additional new species are described (Abrothallus subhalei sp. nov., Atronectria lobariellae sp. nov., Corticifraga microspora sp. nov., Epithamnolia rugosopycnidiata sp. nov., Lichenotubeufia cryptica sp. nov., Neobaryopsis andensis sp. nov., Pseudodidymocyrtis lobariellae sp. nov., Rhagadostomella hypolobariella sp. nov., and Xylaria lichenicola sp. nov.). Phylogenetic placements of 13 lichenicolous species are reported here for Abrothallus, Arthonia, Globonectria, Lawreyella, Monodictys, Neobaryopsis, Pseudodidymocyrtis, Sclerococcum, Trichonectria and Xylaria. The name Sclerococcum ricasoliae comb. nov. is reestablished for the neotropical populations formerly named S. lobariellum (Sclerococcales). A key to sexual and asexual states of 40 species of lobariellicolous ascomycetous fungi is provided. Teleomorph-anamorph connections were established for several species using molecular methods and/or visual observations in nature. Additionally, we found that the anamorphic species Cornutispora ophiurospora inhabiting Lobariella was often accompanied by ascomata of Spirographa. Results of phylogenetic analyses, including newly generated sequences of several Cornutispora and Spirographa species inhabiting various host lichens, support the conclusion that Cornutispora is a synonym of Spirographa. Our Maximum Likelihood inference based on multiple loci show that all studied Spirographa (including Cornutispora) belong to a new lineage within Ostropales. Based on these highly supported phylogenetic placements and the distinct character states of their conidiomata, in comparison with other Lecanoromycetes, a new family is proposed – Spirographaceae fam. nov. This new lineage includes broadly distributed mycoparasites, inhabiting various lichen and fungal hosts, and representing an early diversification event preceding the lichen-forming clade of Fissurinaceae, Gomphillaceae and Graphidaceae. Two lichenicolous species, Asteroglobulus giselae and Pleoscutula arsenii, were found to be nested within the Spirographa clade, and their teleomorph-anamorph connections were confirmed based on genotypic and phenotypic data. This phylogenetic result is corroborated by their highly similar ascomata anatomy. Together these results strongly indicate that both species are congeneric with Spiro","PeriodicalId":52151,"journal":{"name":"Plant and Fungal Systematics","volume":"64 1","pages":"283 - 344"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49209028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 30
Green and charophytic algae of the high-mountain Nesamovyte and Brebeneskul lakes (Eastern Carpathians, Ukraine) 高山Nesamovyte湖和Brebeneskul湖的绿藻和绿藻(乌克兰喀尔巴阡山脉东部)
Plant and Fungal Systematics Pub Date : 2019-07-01 DOI: 10.2478/pfs-2019-0007
P. Tsarenko, K. Wołowski, J. Lenarczyk, O. Bilous, Halyna Lilitska
{"title":"Green and charophytic algae of the high-mountain Nesamovyte and Brebeneskul lakes (Eastern Carpathians, Ukraine)","authors":"P. Tsarenko, K. Wołowski, J. Lenarczyk, O. Bilous, Halyna Lilitska","doi":"10.2478/pfs-2019-0007","DOIUrl":"https://doi.org/10.2478/pfs-2019-0007","url":null,"abstract":"Abstract A study of green and charophytic algae diversity in two high-mountain lakes in the Eastern Carpathians (Ukraine) identified 99 species (109 taxa at species and intraspecific rank) in 35 genera from different ecotopes of the studied lakes. Algal species composition was characterized, and the ecological parameters of the lakes were determined from monitoring data recorded over the last century. Environmental analyses using bioindication methods based only on data on the composition of green and charophytic algae confirmed that the environmental inferences were accurate. Degradation of the Nesamovyte and Brebeneskul lake ecosystems, as compared with their earlier states, was noted.","PeriodicalId":52151,"journal":{"name":"Plant and Fungal Systematics","volume":"64 1","pages":"53 - 64"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47819896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Morphology and molecular phylogeny of Gomphonemopsis sieminskae sp. nov. isolated from brackish waters of the East China Sea coast 中国东海沿岸半咸淡水Gomphonemopsis sieminskae sp. 11 .的形态和分子系统发育
Plant and Fungal Systematics Pub Date : 2019-07-01 DOI: 10.2478/pfs-2019-0003
M. Krzywda, R. Gastineau, M. Bąk, Przemysław Dąbek, E. Górecka, Zhou Cheng-xu, H. LANGE-BERTALOT, Chun L. Li, A. Witkowski
{"title":"Morphology and molecular phylogeny of Gomphonemopsis sieminskae sp. nov. isolated from brackish waters of the East China Sea coast","authors":"M. Krzywda, R. Gastineau, M. Bąk, Przemysław Dąbek, E. Górecka, Zhou Cheng-xu, H. LANGE-BERTALOT, Chun L. Li, A. Witkowski","doi":"10.2478/pfs-2019-0003","DOIUrl":"https://doi.org/10.2478/pfs-2019-0003","url":null,"abstract":"Abstract We describe the new species Gomphonemopsis sieminskae from brackish waters of the East China Sea littoral near Ningbo, China. Two diatom strains isolated from Ulva sp. were successfully grown, then analyzed by light (LM) and scanning electron (SEM) microscopy. The new species is compared to known Gomphonemopsis species, and similarities to G. pseudoexigua and G. obscurum are emphasized. Although the size metric data overlap and the external views are fairly similar, the two taxa differ in their valve interior. Molecular barcoding strongly discriminated G. sieminskae from G. cf. exigua, while rbcL gene-based phylogeny showed G. sieminskae to be sister to Phaeodactylum tricornutum. In this respect our results confirm the recent discovery, based on molecular data, that Gomphonemopsis is a close-relative taxon to Phaeodactylum, and place it in Phaeodactylaceae instead of Rhoicospheniaceae as inferred solely from morphology.","PeriodicalId":52151,"journal":{"name":"Plant and Fungal Systematics","volume":" 7","pages":"17 - 24"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2478/pfs-2019-0003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41254338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Auxospore wall structure and postsexual valve morphology in Rhabdonema minutum Kützing k<s:1> tzing横纹肌的副孢子壁结构和性后瓣膜形态
Plant and Fungal Systematics Pub Date : 2019-07-01 DOI: 10.2478/pfs-2019-0005
I. Kaczmarska, J. Ehrman
{"title":"Auxospore wall structure and postsexual valve morphology in Rhabdonema minutum Kützing","authors":"I. Kaczmarska, J. Ehrman","doi":"10.2478/pfs-2019-0005","DOIUrl":"https://doi.org/10.2478/pfs-2019-0005","url":null,"abstract":"Abstract Several decades ago, three members of the araphid pennate genus Rhabdonema (R. adriaticum, R. arcuatum, R. minutum) were the first araphid diatoms studied using cultures and electron microscopical methods to determine auxospore structure and development. Of these, R. minutum was the least documented at that time. None have been reinvestigated until now. Here we present the structural elements of the mature auxospore and the initial and postsexual valve characteristics of R. minutum. Although in general the auxospore wall of this diatom is similar to that of the two other species examined (to the extent that they were documented), there are intriguing differences. Most unanticipated is the structure of the primary band of the longitudinal perizonium, which shows remarkable similarities to the raphid pennate diatom valve. The evolutionary implications of such a similarity are considered.","PeriodicalId":52151,"journal":{"name":"Plant and Fungal Systematics","volume":"64 1","pages":"33 - 40"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46049620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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