Pub Date : 2024-05-16DOI: 10.11646/phytotaxa.649.1.5
Mehdi Mehrabi, B. Asgari, R. Zare
We describe Myxotrichum persicum sp. nov. as a seed endophyte of Aegilops triuncialis in Lorestan province of Iran, using morphological traits and sequences of the internal transcribed spacer regions 1 and 2 including the intervening 5.8S nuclear ribosomal DNA (ITS) and partial nuclear 28S ribosomal DNA (LSU) regions. Myxotrichum persicum is differentiated from its closest relative, M. deflexum, by possessing smaller ascomata bearing much shorter, usually unbranched appendages, and smaller, ellipsoidal to fusiform, smooth-walled ascospores. Based on morphology and the multilocus phylogeny of ITS, LSU, MCM7 and RPB1, we herein propose to combine two species of Malbranchea, namely M. circinata and M. flavorosea, into the genus Myxotrichum as Myxotrichum circinatum and M. flavoroseum, respectively.
{"title":"Myxotrichum persicum sp. nov., and two new combinations in the genus Myxotrichum","authors":"Mehdi Mehrabi, B. Asgari, R. Zare","doi":"10.11646/phytotaxa.649.1.5","DOIUrl":"https://doi.org/10.11646/phytotaxa.649.1.5","url":null,"abstract":"We describe Myxotrichum persicum sp. nov. as a seed endophyte of Aegilops triuncialis in Lorestan province of Iran, using morphological traits and sequences of the internal transcribed spacer regions 1 and 2 including the intervening 5.8S nuclear ribosomal DNA (ITS) and partial nuclear 28S ribosomal DNA (LSU) regions. Myxotrichum persicum is differentiated from its closest relative, M. deflexum, by possessing smaller ascomata bearing much shorter, usually unbranched appendages, and smaller, ellipsoidal to fusiform, smooth-walled ascospores. Based on morphology and the multilocus phylogeny of ITS, LSU, MCM7 and RPB1, we herein propose to combine two species of Malbranchea, namely M. circinata and M. flavorosea, into the genus Myxotrichum as Myxotrichum circinatum and M. flavoroseum, respectively.","PeriodicalId":20114,"journal":{"name":"Phytotaxa","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140970108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-16DOI: 10.11646/phytotaxa.649.1.4
WEI CHEN, PAN YU, GAOFEI SONG, REDIAT ABATE
A new freshwater diatom species, Achnanthes licunese sp. nov., was found on pebble samples collected from Licun River in Shandong Province, China. The various taxonomic characteristics of Achnanthes licunese sp. nov. is observed under light and scanning electron microscope. The living cells of A. licunese sp. nov. possesses two chloroplasts. Its valves exhibit a linear to linear-lanceolate outline, slightly constricted in the middle part, with uniseriate striae. The central area of the raphid valves is expanded into a linear and thickened stauros, and the raphe is filiform. On the araphid valves, there is no central area, and the axial area (sternum) is located in the valve margin. The valve of the A. licunese sp. nov. possesses the marginal spines, but no marginal ridge and terminal orbiculi. By comparing the new species with similar Achnanthes species, A. licunese sp. nov. was confirmed to be sufficiently different regarding valve size, striae density, and the presence of marginal spines. The discovery of this species increases the diversity of freshwater diatoms.
{"title":"A new freshwater species Achnanthes licunese sp. nov. (Achnanthaceae, Bacillariophyta) from pebbles of Licun River, Shandong Province, China","authors":"WEI CHEN, PAN YU, GAOFEI SONG, REDIAT ABATE","doi":"10.11646/phytotaxa.649.1.4","DOIUrl":"https://doi.org/10.11646/phytotaxa.649.1.4","url":null,"abstract":"A new freshwater diatom species, Achnanthes licunese sp. nov., was found on pebble samples collected from Licun River in Shandong Province, China. The various taxonomic characteristics of Achnanthes licunese sp. nov. is observed under light and scanning electron microscope. The living cells of A. licunese sp. nov. possesses two chloroplasts. Its valves exhibit a linear to linear-lanceolate outline, slightly constricted in the middle part, with uniseriate striae. The central area of the raphid valves is expanded into a linear and thickened stauros, and the raphe is filiform. On the araphid valves, there is no central area, and the axial area (sternum) is located in the valve margin. The valve of the A. licunese sp. nov. possesses the marginal spines, but no marginal ridge and terminal orbiculi. By comparing the new species with similar Achnanthes species, A. licunese sp. nov. was confirmed to be sufficiently different regarding valve size, striae density, and the presence of marginal spines. The discovery of this species increases the diversity of freshwater diatoms.","PeriodicalId":20114,"journal":{"name":"Phytotaxa","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140967909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-16DOI: 10.11646/phytotaxa.649.1.1
G. Lannuzel, J. Munzinger, Hervé Vandrot, Gildas Gâteblé
The genus Alyxia Banks ex R.Br. is partially revised for New Caledonia, with 31 species recognised. The species complex Alyxia tisserantii Montrouz. is discussed and divided into seven species with existing names, and the synonymy is updated accordingly. Alyxia loeseneriana var. macrocarpa Boiteau is elevated to species status due to new flowering material with the name A. paniensis Lannuzel nom. nov., stat. nov. created to accommodate it, due to the preexisting Alyxia macrocarpa Koord. Detailed study of Alyxia caletioides (Baill.) Guillaumin ex Däniker revealed it was in fact made up of two distinct taxa; a new separate species, Alyxia urceolata Lannuzel, sp.nov. is therefore described. Two new species are also described following their recent collection: Alyxia humboldtensis Lannuzel & Gâteblé, sp.nov. is restricted to the summit of Mount Humboldt, and Alyxia minimiflora Lannuzel, sp.nov. is known from schistaceous cliffs around Nouméa. Finally, several nomenclatural issues are discussed, and an updated key to the genus in New Caledonia is provided.
对新喀里多尼亚的 Alyxia Banks ex R.Br. 属进行了部分修订，确认了 31 个种。Alyxia tisserantii Montrouz.的种群进行了讨论，并将其划分为 7 个现有名称的种，同时对同义词进行了相应更新。Alyxia loeseneriana var. macrocarpa Boiteau 由于新的开花材料而被提升为种，名称为 A. paniensis Lannuzel nom.对 Alyxia caletioides (Baill.) Guillaumin ex Däniker 的详细研究表明，它实际上由两个不同的类群组成；因此描述了一个独立的新种 Alyxia urceolata Lannuzel, sp.nov.。此外还描述了最近采集到的两个新种：Alyxia humboldtensis Lannuzel & Gâteblé，sp.nov.仅限于洪堡山山顶，而 Alyxia minimiflora Lannuzel，sp.nov.则产于努美阿附近的片岩悬崖。最后，还讨论了几个命名问题，并提供了新喀里多尼亚该属的最新检索表。
{"title":"Alyxia Banks ex R.Br. in New Caledonia: a clarification of several species complexes, nomenclatural notes, and a description of three new species","authors":"G. Lannuzel, J. Munzinger, Hervé Vandrot, Gildas Gâteblé","doi":"10.11646/phytotaxa.649.1.1","DOIUrl":"https://doi.org/10.11646/phytotaxa.649.1.1","url":null,"abstract":"The genus Alyxia Banks ex R.Br. is partially revised for New Caledonia, with 31 species recognised. The species complex Alyxia tisserantii Montrouz. is discussed and divided into seven species with existing names, and the synonymy is updated accordingly. Alyxia loeseneriana var. macrocarpa Boiteau is elevated to species status due to new flowering material with the name A. paniensis Lannuzel nom. nov., stat. nov. created to accommodate it, due to the preexisting Alyxia macrocarpa Koord. Detailed study of Alyxia caletioides (Baill.) Guillaumin ex Däniker revealed it was in fact made up of two distinct taxa; a new separate species, Alyxia urceolata Lannuzel, sp.nov. is therefore described. Two new species are also described following their recent collection: Alyxia humboldtensis Lannuzel & Gâteblé, sp.nov. is restricted to the summit of Mount Humboldt, and Alyxia minimiflora Lannuzel, sp.nov. is known from schistaceous cliffs around Nouméa. Finally, several nomenclatural issues are discussed, and an updated key to the genus in New Caledonia is provided.","PeriodicalId":20114,"journal":{"name":"Phytotaxa","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140967683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-16DOI: 10.11646/phytotaxa.649.1.7
Leonarodo O. Alvarado-Cárdenas, A. GARCÍA-MENDOZA, Daniel Sandoval-Gutiérrez, Lucio Lozada-Pérez
We describe a new species of Polystemma endemic to Oaxaca, Mexico. Polystemma leopardum is similar to P. cordatum but differs in the shape of the corolla lobes, flower color pattern, shape of the gynostegial corona and stylar head, as well as its specialized habitat. We describe and discuss its morphology and provide illustrations and a distribution map. We propose its conservation status as Endangered under the criteria of the IUCN. This discovery increases the diversity of the genus in the country to ten species.
{"title":"A new species of Polystemma (Apocynaceae, Asclepiadoideae, Asclepiadeae, Gonolobineae) from the state of Oaxaca, Mexico","authors":"Leonarodo O. Alvarado-Cárdenas, A. GARCÍA-MENDOZA, Daniel Sandoval-Gutiérrez, Lucio Lozada-Pérez","doi":"10.11646/phytotaxa.649.1.7","DOIUrl":"https://doi.org/10.11646/phytotaxa.649.1.7","url":null,"abstract":"We describe a new species of Polystemma endemic to Oaxaca, Mexico. Polystemma leopardum is similar to P. cordatum but differs in the shape of the corolla lobes, flower color pattern, shape of the gynostegial corona and stylar head, as well as its specialized habitat. We describe and discuss its morphology and provide illustrations and a distribution map. We propose its conservation status as Endangered under the criteria of the IUCN. This discovery increases the diversity of the genus in the country to ten species.","PeriodicalId":20114,"journal":{"name":"Phytotaxa","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140967070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-16DOI: 10.11646/phytotaxa.649.1.6
Nivetha Manogaran, A. KAYALVIZHI A, Kumar Munuswamy
A new species of Hysterium, is described from tropical dry evergreen forest region of Chennai, Tamil Nadu, India, based on both morphological characteristics and molecular phylogenetic analysis using the Internal Transcribed Spacers (ITS) region of nuclear ribosomal DNA. The key morphological characters of the ascomata include the presence of a longitudinal slit remaining closed even at maturity. The ascospores biseriate having three septa with all the cells evenly pigmented including the terminal cells. The ascus measuring 115–122 × 20–22 μm. Ascospores initially two celled and finally become four celled, hyaline first, later changing to yellow and then dark brown, oblong to ellipsoid, 28–39 × 7–12 μm. The nrITS-based phylogenetic tree inferred from the Bayesian posterior probabilities indicate that H. madraspatanum is closely related to Hysterium pulicare, H. angustatum and H. rhizophorae. However, H. madraspatanum is morphologically distinct from them by having relatively larger spore size, shallow groove in the ascomata, spores with concolorous terminal cells. Therefore, is a novel species under the genus Hysterium. Azadirachta indica is reported in the study as a new host for the genus Hysterium.
{"title":"Hysterium madraspatanum (Hysteriaceae), a new species from Tropical Dry Evergreen Forest of Tamil Nadu, India","authors":"Nivetha Manogaran, A. KAYALVIZHI A, Kumar Munuswamy","doi":"10.11646/phytotaxa.649.1.6","DOIUrl":"https://doi.org/10.11646/phytotaxa.649.1.6","url":null,"abstract":"A new species of Hysterium, is described from tropical dry evergreen forest region of Chennai, Tamil Nadu, India, based on both morphological characteristics and molecular phylogenetic analysis using the Internal Transcribed Spacers (ITS) region of nuclear ribosomal DNA. The key morphological characters of the ascomata include the presence of a longitudinal slit remaining closed even at maturity. The ascospores biseriate having three septa with all the cells evenly pigmented including the terminal cells. The ascus measuring 115–122 × 20–22 μm. Ascospores initially two celled and finally become four celled, hyaline first, later changing to yellow and then dark brown, oblong to ellipsoid, 28–39 × 7–12 μm. The nrITS-based phylogenetic tree inferred from the Bayesian posterior probabilities indicate that H. madraspatanum is closely related to Hysterium pulicare, H. angustatum and H. rhizophorae. However, H. madraspatanum is morphologically distinct from them by having relatively larger spore size, shallow groove in the ascomata, spores with concolorous terminal cells. Therefore, is a novel species under the genus Hysterium. Azadirachta indica is reported in the study as a new host for the genus Hysterium.","PeriodicalId":20114,"journal":{"name":"Phytotaxa","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140970270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-15DOI: 10.11646/phytotaxa.648.1.1
Alan R. Franck
Sapindus (Sapindaceae) consists of 13–20 species of trees that are well known for their soap-making properties and the utility of their hard, spheroidal seeds for ornament or games. Section Sapindus has the most wide-ranging distribution within the genus, native to the Americas, Asia, Melanesia, and Polynesia. The number of species recognized in sect. Sapindus has ranged from only one species (S. saponaria) in several treatments to as many as seven species in Radlkofer’s monograph of the family. Undertaking a revision of Sapindus sect. Sapindus, over 1000 herbarium specimens were studied (physically or digitally) and four species were studied in in the field and/or in cultivation. Within sect. Sapindus, 12 species are here recognized, including three newly described species (S. marikuru, S. motu-koita, and S. standleyi), one new combination (S. tricarpus), one new subspecies (S. saponaria subsp. jardinianus), and one new variety (S. drummondii var. glabratus). Oceanic and animal-mediated dispersal are likely responsible for the wide distribution of sect. Sapindus, and human-aided dispersal is probably much more limited than has been suggested by prior authors. The native distribution of S. saponaria subsp. saponaria is emended to include only southern Florida (USA), Mexico, the Caribbean Islands, Central America, South America, and the Galápagos. Another two species of Sapindus from Vietnam that cannot confidently be assigned to any one section of Sapindus are briefly discussed.
{"title":"Revision of Sapindus sect. Sapindus (Sapindeae, Sapindoideae, Sapindaceae), including the description of three new species","authors":"Alan R. Franck","doi":"10.11646/phytotaxa.648.1.1","DOIUrl":"https://doi.org/10.11646/phytotaxa.648.1.1","url":null,"abstract":"Sapindus (Sapindaceae) consists of 13–20 species of trees that are well known for their soap-making properties and the utility of their hard, spheroidal seeds for ornament or games. Section Sapindus has the most wide-ranging distribution within the genus, native to the Americas, Asia, Melanesia, and Polynesia. The number of species recognized in sect. Sapindus has ranged from only one species (S. saponaria) in several treatments to as many as seven species in Radlkofer’s monograph of the family. Undertaking a revision of Sapindus sect. Sapindus, over 1000 herbarium specimens were studied (physically or digitally) and four species were studied in in the field and/or in cultivation. Within sect. Sapindus, 12 species are here recognized, including three newly described species (S. marikuru, S. motu-koita, and S. standleyi), one new combination (S. tricarpus), one new subspecies (S. saponaria subsp. jardinianus), and one new variety (S. drummondii var. glabratus). Oceanic and animal-mediated dispersal are likely responsible for the wide distribution of sect. Sapindus, and human-aided dispersal is probably much more limited than has been suggested by prior authors. The native distribution of S. saponaria subsp. saponaria is emended to include only southern Florida (USA), Mexico, the Caribbean Islands, Central America, South America, and the Galápagos. Another two species of Sapindus from Vietnam that cannot confidently be assigned to any one section of Sapindus are briefly discussed.","PeriodicalId":20114,"journal":{"name":"Phytotaxa","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140975837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The dividing lines between species in the Pteris fauriei group (Pteridaceae) are questionable and the systematic positions of some species in this group remain unclear. To help comprehensively understand the phylogenetic relationships and resolve the taxonomic problems in this group a phylogenetic tree was reconstructed based on five chloroplast DNA regions (atpA, matK, rbcL, rps4-trnS & trnL-trnF) from 22 Pteris taxa. Additionally, their spore morphology and type materials were studied. Based on the molecular and morphology evidence, we made treatments as follow: P. oshimensis Hieron. var. paraemeiensis Ching ex Ching et S.H. Wu was raised as a species from a variety of P. oshimensis Hieron; P. fauriei Hieron. var. chinensis Ching et S.H. Wu was treated as a synonym of P. austrotaiwanensis Y.S. Chao, rather than a synonym of P. latipinna Y.S. Chao & W.L. Chiou; and P. omeiensis Ching was restored to species status from a synonym of P. oshimensis Hieron.
蝶形花科（Pteridaceae）蝶形花属（Pteris fauriei）物种之间的分界线值得商榷，该属（Pteridaceae）中一些物种的系统位置仍不明确。为了帮助全面了解该组的系统发育关系并解决分类问题，我们根据 22 个翼手目类群的五个叶绿体 DNA 区域（atpA、matK、rbcL、rps4-trnS 和 trnL-trnF）重建了系统发生树。此外，还研究了它们的孢子形态和类型材料。根据分子和形态学证据，我们做出了如下处理：var. paraemeiensis Ching ex Ching et S.H. Wu 作为 P. oshimensis Hieron 的变种；P. fauriei Hieron.austrotaiwanensis Y.S. Chao，而不是 P. latipinna Y.S. Chao & W.L. Chiou 的异名；P. omeiensis Ching 从 P. oshimensis Hieron 的异名恢复为种。
{"title":"New taxonomic treatments in the Pteris fauriei group (Pteridaceae)","authors":"Dongmei Yang, JIA-MEI Wang, RUI GUO, HONGJUAN ZHU, CHANGWANG MA, Jing Yu, YA Liu, You-gen Wu, Hui Shang","doi":"10.11646/phytotaxa.647.3.2","DOIUrl":"https://doi.org/10.11646/phytotaxa.647.3.2","url":null,"abstract":"The dividing lines between species in the Pteris fauriei group (Pteridaceae) are questionable and the systematic positions of some species in this group remain unclear. To help comprehensively understand the phylogenetic relationships and resolve the taxonomic problems in this group a phylogenetic tree was reconstructed based on five chloroplast DNA regions (atpA, matK, rbcL, rps4-trnS & trnL-trnF) from 22 Pteris taxa. Additionally, their spore morphology and type materials were studied. Based on the molecular and morphology evidence, we made treatments as follow: P. oshimensis Hieron. var. paraemeiensis Ching ex Ching et S.H. Wu was raised as a species from a variety of P. oshimensis Hieron; P. fauriei Hieron. var. chinensis Ching et S.H. Wu was treated as a synonym of P. austrotaiwanensis Y.S. Chao, rather than a synonym of P. latipinna Y.S. Chao & W.L. Chiou; and P. omeiensis Ching was restored to species status from a synonym of P. oshimensis Hieron.","PeriodicalId":20114,"journal":{"name":"Phytotaxa","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140978961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14DOI: 10.11646/phytotaxa.647.3.3
Mailor Wellinton Wedig Amaral, G. Medeiros, Vanessa Daufenbach, S. C. Sampaio, R. R. Reis, T. A. Ludwig, N. C. Bueno
Epilithic diatom species in eight sampling sites of the Cascavel River, Southern Brazil, were taxonomically analyzed. The studied streams are located in a predominantly urban micro-watershed, with distroferric red latosol (rich in Fe and Al), being characterized by distinct metals, predominantly acidic pH, and high conductivity. Overall, 221 diatom species were identified at infrageneric level. Pinnularia was the most representative genus in number of species (28 spp.), followed by Eunotia (25 spp.), Gomphonema (17 spp.), Nitzschia (14 spp.), and Navicula (11 spp.). This is the first record of Fragilaria spectra, Fragilaria tenera var. nanana and Humidophila arcuatoides for the state of Paraná, and the first record of Pinnularia laucensis in Brazil. We found teratological valves in 34 taxa, containing modified outline, changes in the striae pattern, and doubled central area. The genus Eunotia showed the highest number of altered taxa (8 spp.). Mixed teratologies (deformed valve outline + unusual striae pattern) were found only in Ulnaria ulna, Encyonema neomesianum, and Gomphonema graciledictum. The metals and environmental variables in the Cascavel River micro-watershed likely contributed to the diatom teratologies. Our work contributes to the taxonomic knowledge of epilithic diatoms in the region, as well as extending the record of teratological taxa in the literature.
{"title":"Taxonomy of epilithic diatoms and teratological forms under the presence of metals in surface sediment","authors":"Mailor Wellinton Wedig Amaral, G. Medeiros, Vanessa Daufenbach, S. C. Sampaio, R. R. Reis, T. A. Ludwig, N. C. Bueno","doi":"10.11646/phytotaxa.647.3.3","DOIUrl":"https://doi.org/10.11646/phytotaxa.647.3.3","url":null,"abstract":"Epilithic diatom species in eight sampling sites of the Cascavel River, Southern Brazil, were taxonomically analyzed. The studied streams are located in a predominantly urban micro-watershed, with distroferric red latosol (rich in Fe and Al), being characterized by distinct metals, predominantly acidic pH, and high conductivity. Overall, 221 diatom species were identified at infrageneric level. Pinnularia was the most representative genus in number of species (28 spp.), followed by Eunotia (25 spp.), Gomphonema (17 spp.), Nitzschia (14 spp.), and Navicula (11 spp.). This is the first record of Fragilaria spectra, Fragilaria tenera var. nanana and Humidophila arcuatoides for the state of Paraná, and the first record of Pinnularia laucensis in Brazil. We found teratological valves in 34 taxa, containing modified outline, changes in the striae pattern, and doubled central area. The genus Eunotia showed the highest number of altered taxa (8 spp.). Mixed teratologies (deformed valve outline + unusual striae pattern) were found only in Ulnaria ulna, Encyonema neomesianum, and Gomphonema graciledictum. The metals and environmental variables in the Cascavel River micro-watershed likely contributed to the diatom teratologies. Our work contributes to the taxonomic knowledge of epilithic diatoms in the region, as well as extending the record of teratological taxa in the literature.","PeriodicalId":20114,"journal":{"name":"Phytotaxa","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140979881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14DOI: 10.11646/phytotaxa.647.3.1
LU Wang, Zhengli Kang, Hongmin Zhou, Changlin Zhao
Wood-inhabiting fungi are found in living trees, decorticated wood of dead tree branches and trunks as well as manufactured wood products, and play an important role in forest ecosystems as an important group of decomposers. In this present study, two new wood-inhabiting fungal taxa, Candelabrochaete yunnanensis and Hyphodermella sinensis are proposed based on a combination of the morphological features and molecular evidence. Candelabrochaete yunnanensis is characterized by the farinaceous basidiomata with the flesh-pinkish to brownish vinaceous hymenial surface, a monomitic hyphal system with simple-septate generative hyphae, presence of the cylindrical septocystidia and ellipsoid basidiospores (4–5 × 2.5–3 µm). Hyphodermella sinensis is characterized by the membranaceous basidiomata having the white to slightly greyish hymenial surface, a monomitic hyphal system with clamp generative hyphae, presence of the clavate cystidia and ellipsoid basidiospores (4–6 × 3–4 µm). The phylogenetic tree inferred from ITS+nLSU sequences revealed that Candelabrochaete yunnanensis was nested into the family Irpicaceae within the order Polyporales, in which it was closely related to the species C. africana; Hyphodermella sinensis grouped into the genus Hyphodermella and clustered into the family Phanerochaetaceae, in which it grouped with H. aurantiaca and H. zixishanensis.
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