The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Li-bing Zhang - One of the best experts on this subject based on the ideXlab platform.
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Fern nothogenera and ×Lepinema, a new hybrid genus between Ellipinema and Lepisorus (Polypodiaceae)
Phytotaxa, 2020Co-Authors: Liang Zhang, Li-bing ZhangAbstract:The biological species concept is not exclusively applicable in many groups of organisms including ferns. Interspecific fern hybrids are not rare: there are 16 intergeneric hybrid genera in ferns confirmed with molecular data. Here we add one more hybrid genus in the tribe Lepisoreae of Polypodiaceae, ×Lepinema, formed via hybridization between parents in two genera: Ellipinema and Lepisorus.
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phylogeny and classification of the tribe lepisoreae Polypodiaceae pteridophyta with the description of a new genus ellipinema gen nov segregated from lepisorus
Molecular Phylogenetics and Evolution, 2020Co-Authors: Liang Zhang, Li-bing Zhang, Hang Sun, Xin-mao Zhou, Ralf Knapp, Zhenlong Liang, Xueping Fan, Minshu Song, Xinfen GaoAbstract:Lepisoroid ferns (tribe Lepisoreae, Polypodiaceae) are arguably one of the most confusing fern groups in Polypodiaceae in terms of delimitation of genera largely because of their simple morphology. Previous molecular studies either had very small taxon sampling of the non-Lepisorus genera and did not well resolve the relationships among these genera, or had a relatively large sampling at species level but the critical species were missing or their relationships were not well resolved. A recent study resolved the newly sampled Lepisorus jakonensis as sister to the remaining genera in Lepisoreae excluding Paragramma, and the authors lumped all the six well recognized genera into Lepisorus. In the present study, to infer a phylogeny we used DNA sequences of five plastid markers (matK, rbcL, rbcL-atpB, rps4 r (2) The Lepisorus jakonensis clade is confirmed to be the second earliest diverged lineage in Lepisoreae; (3) Neolepisorus is resolved as sister to the rest in a clade containing all non-Lepisorus genera except Paragramma; (4) Lemmaphyllum is sister to a clade containing Lepidomicrosorium, Neocheiropteris, and Tricholepidium; and (5) Ellipinema gen. nov. is segregated from Lepisorus based on the phylogeny and morphology in order to stabilize the current usage of the existing six non-Lepisorus genera and species names in these genera. A key to all eight genera of Lepisoreae is provided.
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leptochilus sarawakensis nom nov Polypodiaceae from malaysia
Phytotaxa, 2018Co-Authors: Liang Zhang, Li-bing ZhangAbstract:Recent molecular work has found that the fern genera Colysis C. Presl (1849: 146), Kontumia S.K. Wu & K.L. Phan (2005: 245), and Paraleptochilus Copeland (1947: 198) should be subsumed under Leptochilus Kaulfuss (1824: 147) (Dong et al. 2008, Kreier et al. 2008, Kim et al. 2012, Zhang et al. in press) so that Leptochilus can be maintained as monophyletic. The newly defined Leptochilus is then characterized by having an epiphytic habit, simple sterile leaves (except in Kontumia ), and much contracted fertile leaves fully covered (except in Kontumia ) with sori (acrostichoid sori). Following the results of a new molecular phylogeny (Zhang et al. in press) and morphological study nine new combinations in Leptochilus were made recently (Zhang et al. 2018) including L. fluviatili s (Lauterbach 1910: 507) Liang Zhang & Li Bing Zhang in Zhang et al. (2018: 173). However, the epithet “ fluviatili s” is not available when Polypodium fluviatile Lauterbach in Winkler (1910: 507) is transferred to Leptochilus . Here we provide a new name for Polypodium fluviatile in Leptochilus .
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A new species of Hypodematium (Polypodiaceae, Hypodematioideae) from a limestone cave in Thailand
Phytotaxa, 2016Co-Authors: Puttamon Pongkai, Li-bing Zhang, Rossarin PollawatnAbstract:A new fern species, Hypodematium boonkerdii (Polypodiaceae subfamily Hypodematioideae), is described and illustrated from a limestone area in northeastern Thailand. It is distinguished from its closest relative, H. crenatum , by having a membranous lamina texture, sessile or subsessile pinnae and only one sorus per pinnule segment.
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Leptochilus oblongus (Polypodiaceae), a new fern species from northern Vietnam
Phytotaxa, 2015Co-Authors: Liang Zhang, Li-bing ZhangAbstract:A new fern species, Leptochilus oblongus of Polypodiaceae is described and illustrated from Hoa Binh Province, northern Vietnam. Leptochilus oblongus is most similar to L. ellipticus, but the sori of the former are oblong, close to the lobe margins, and parallel with costule . In contrast, those of the latter are linear, located on main lateral veins, and forming a ca. 45 degree angle with costule.
Xin-mao Zhou - One of the best experts on this subject based on the ideXlab platform.
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phylogeny and classification of the tribe lepisoreae Polypodiaceae pteridophyta with the description of a new genus ellipinema gen nov segregated from lepisorus
Molecular Phylogenetics and Evolution, 2020Co-Authors: Liang Zhang, Li-bing Zhang, Hang Sun, Xin-mao Zhou, Ralf Knapp, Zhenlong Liang, Xueping Fan, Minshu Song, Xinfen GaoAbstract:Lepisoroid ferns (tribe Lepisoreae, Polypodiaceae) are arguably one of the most confusing fern groups in Polypodiaceae in terms of delimitation of genera largely because of their simple morphology. Previous molecular studies either had very small taxon sampling of the non-Lepisorus genera and did not well resolve the relationships among these genera, or had a relatively large sampling at species level but the critical species were missing or their relationships were not well resolved. A recent study resolved the newly sampled Lepisorus jakonensis as sister to the remaining genera in Lepisoreae excluding Paragramma, and the authors lumped all the six well recognized genera into Lepisorus. In the present study, to infer a phylogeny we used DNA sequences of five plastid markers (matK, rbcL, rbcL-atpB, rps4 r (2) The Lepisorus jakonensis clade is confirmed to be the second earliest diverged lineage in Lepisoreae; (3) Neolepisorus is resolved as sister to the rest in a clade containing all non-Lepisorus genera except Paragramma; (4) Lemmaphyllum is sister to a clade containing Lepidomicrosorium, Neocheiropteris, and Tricholepidium; and (5) Ellipinema gen. nov. is segregated from Lepisorus based on the phylogeny and morphology in order to stabilize the current usage of the existing six non-Lepisorus genera and species names in these genera. A key to all eight genera of Lepisoreae is provided.
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A plastid phylogeny and character evolution of the Old World fern genus Pyrrosia (Polypodiaceae) with the description of a new genus: Hovenkampia (Polypodiaceae).
Molecular phylogenetics and evolution, 2017Co-Authors: Xin-mao Zhou, Liang Zhang, Cheng-wei Chen, Yao-moan Huang, De-kui Chen, Daniele Cicuzza, Ralf Knapp, Thien Tam LuongAbstract:The Old World fern genus Pyrrosia (Polypodiaceae) offers a rare system in ferns to study morphological evolution because almost all species of this genus are well studied for their morphology, anatomy, and spore features, and various hypotheses have been proposed in terms of the phylogeny and evolution in this genus. However, the molecular phylogeny of the genus lags behind. The monophyly of the genus has been uncertain and a modern phylogenetic study of the genus based on molecular data has been lacking. In the present study, DNA sequences of five plastid markers of 220 accessions of Polypodiaceae representing two species of Drymoglossum, 14 species of Platycerium, 50 species of Pyrrosia, and the only species of Saxiglossum (subfamily Platycerioideae), and 12 species of other Polypodiaceae representing the remaining four subfamilies are used to infer a phylogeny of the genus. Major results and conclusions of this study include: (1) Pyrrosia as currently circumscribed is paraphyletic in relation to Platycerium and can be divided into two genera: Pyrrosia s.s. and Hovenkampia (gen. nov.), with Hovenkampia and Platycerium forming a strongly supported clade sister to Pyrrosia s.s.; (2) Subfamily Platycerioideae should contain three genera only, Hovenkampia, Platycerium, and Pyrrosia s.s.; (3) Based on the molecular phylogeny, macromorphology, anatomical features, and spore morphology, four major clades in the genus are identified and three of the four are further resolved into four, four, and six subclades, respectively; (4) Three species, P. angustissima, P. foveolata, and P. mannii, not assigned to any groups by Hovenkamp (1986) because of their unusual morphology, each form monospecific clades; (5) Drymoglossum is not monophyletic and those species previously assigned to this genus are resolved in two different subclades; (6) Saxiglossum is resolved as the first lineage in the Niphopsis clade; and (7) The evolution of ten major morphological characters in the subfamily is inferred based on the phylogeny and various morphological synapomorphies for various clades and subclades are identified.
Thien Tam Luong - One of the best experts on this subject based on the ideXlab platform.
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A plastid phylogeny and character evolution of the Old World fern genus Pyrrosia (Polypodiaceae) with the description of a new genus: Hovenkampia (Polypodiaceae).
Molecular phylogenetics and evolution, 2017Co-Authors: Xin-mao Zhou, Liang Zhang, Cheng-wei Chen, Yao-moan Huang, De-kui Chen, Daniele Cicuzza, Ralf Knapp, Thien Tam LuongAbstract:The Old World fern genus Pyrrosia (Polypodiaceae) offers a rare system in ferns to study morphological evolution because almost all species of this genus are well studied for their morphology, anatomy, and spore features, and various hypotheses have been proposed in terms of the phylogeny and evolution in this genus. However, the molecular phylogeny of the genus lags behind. The monophyly of the genus has been uncertain and a modern phylogenetic study of the genus based on molecular data has been lacking. In the present study, DNA sequences of five plastid markers of 220 accessions of Polypodiaceae representing two species of Drymoglossum, 14 species of Platycerium, 50 species of Pyrrosia, and the only species of Saxiglossum (subfamily Platycerioideae), and 12 species of other Polypodiaceae representing the remaining four subfamilies are used to infer a phylogeny of the genus. Major results and conclusions of this study include: (1) Pyrrosia as currently circumscribed is paraphyletic in relation to Platycerium and can be divided into two genera: Pyrrosia s.s. and Hovenkampia (gen. nov.), with Hovenkampia and Platycerium forming a strongly supported clade sister to Pyrrosia s.s.; (2) Subfamily Platycerioideae should contain three genera only, Hovenkampia, Platycerium, and Pyrrosia s.s.; (3) Based on the molecular phylogeny, macromorphology, anatomical features, and spore morphology, four major clades in the genus are identified and three of the four are further resolved into four, four, and six subclades, respectively; (4) Three species, P. angustissima, P. foveolata, and P. mannii, not assigned to any groups by Hovenkamp (1986) because of their unusual morphology, each form monospecific clades; (5) Drymoglossum is not monophyletic and those species previously assigned to this genus are resolved in two different subclades; (6) Saxiglossum is resolved as the first lineage in the Niphopsis clade; and (7) The evolution of ten major morphological characters in the subfamily is inferred based on the phylogeny and various morphological synapomorphies for various clades and subclades are identified.
Liang Zhang - One of the best experts on this subject based on the ideXlab platform.
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Fern nothogenera and ×Lepinema, a new hybrid genus between Ellipinema and Lepisorus (Polypodiaceae)
Phytotaxa, 2020Co-Authors: Liang Zhang, Li-bing ZhangAbstract:The biological species concept is not exclusively applicable in many groups of organisms including ferns. Interspecific fern hybrids are not rare: there are 16 intergeneric hybrid genera in ferns confirmed with molecular data. Here we add one more hybrid genus in the tribe Lepisoreae of Polypodiaceae, ×Lepinema, formed via hybridization between parents in two genera: Ellipinema and Lepisorus.
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phylogeny and classification of the tribe lepisoreae Polypodiaceae pteridophyta with the description of a new genus ellipinema gen nov segregated from lepisorus
Molecular Phylogenetics and Evolution, 2020Co-Authors: Liang Zhang, Li-bing Zhang, Hang Sun, Xin-mao Zhou, Ralf Knapp, Zhenlong Liang, Xueping Fan, Minshu Song, Xinfen GaoAbstract:Lepisoroid ferns (tribe Lepisoreae, Polypodiaceae) are arguably one of the most confusing fern groups in Polypodiaceae in terms of delimitation of genera largely because of their simple morphology. Previous molecular studies either had very small taxon sampling of the non-Lepisorus genera and did not well resolve the relationships among these genera, or had a relatively large sampling at species level but the critical species were missing or their relationships were not well resolved. A recent study resolved the newly sampled Lepisorus jakonensis as sister to the remaining genera in Lepisoreae excluding Paragramma, and the authors lumped all the six well recognized genera into Lepisorus. In the present study, to infer a phylogeny we used DNA sequences of five plastid markers (matK, rbcL, rbcL-atpB, rps4 r (2) The Lepisorus jakonensis clade is confirmed to be the second earliest diverged lineage in Lepisoreae; (3) Neolepisorus is resolved as sister to the rest in a clade containing all non-Lepisorus genera except Paragramma; (4) Lemmaphyllum is sister to a clade containing Lepidomicrosorium, Neocheiropteris, and Tricholepidium; and (5) Ellipinema gen. nov. is segregated from Lepisorus based on the phylogeny and morphology in order to stabilize the current usage of the existing six non-Lepisorus genera and species names in these genera. A key to all eight genera of Lepisoreae is provided.
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leptochilus sarawakensis nom nov Polypodiaceae from malaysia
Phytotaxa, 2018Co-Authors: Liang Zhang, Li-bing ZhangAbstract:Recent molecular work has found that the fern genera Colysis C. Presl (1849: 146), Kontumia S.K. Wu & K.L. Phan (2005: 245), and Paraleptochilus Copeland (1947: 198) should be subsumed under Leptochilus Kaulfuss (1824: 147) (Dong et al. 2008, Kreier et al. 2008, Kim et al. 2012, Zhang et al. in press) so that Leptochilus can be maintained as monophyletic. The newly defined Leptochilus is then characterized by having an epiphytic habit, simple sterile leaves (except in Kontumia ), and much contracted fertile leaves fully covered (except in Kontumia ) with sori (acrostichoid sori). Following the results of a new molecular phylogeny (Zhang et al. in press) and morphological study nine new combinations in Leptochilus were made recently (Zhang et al. 2018) including L. fluviatili s (Lauterbach 1910: 507) Liang Zhang & Li Bing Zhang in Zhang et al. (2018: 173). However, the epithet “ fluviatili s” is not available when Polypodium fluviatile Lauterbach in Winkler (1910: 507) is transferred to Leptochilus . Here we provide a new name for Polypodium fluviatile in Leptochilus .
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A plastid phylogeny and character evolution of the Old World fern genus Pyrrosia (Polypodiaceae) with the description of a new genus: Hovenkampia (Polypodiaceae).
Molecular phylogenetics and evolution, 2017Co-Authors: Xin-mao Zhou, Liang Zhang, Cheng-wei Chen, Yao-moan Huang, De-kui Chen, Daniele Cicuzza, Ralf Knapp, Thien Tam LuongAbstract:The Old World fern genus Pyrrosia (Polypodiaceae) offers a rare system in ferns to study morphological evolution because almost all species of this genus are well studied for their morphology, anatomy, and spore features, and various hypotheses have been proposed in terms of the phylogeny and evolution in this genus. However, the molecular phylogeny of the genus lags behind. The monophyly of the genus has been uncertain and a modern phylogenetic study of the genus based on molecular data has been lacking. In the present study, DNA sequences of five plastid markers of 220 accessions of Polypodiaceae representing two species of Drymoglossum, 14 species of Platycerium, 50 species of Pyrrosia, and the only species of Saxiglossum (subfamily Platycerioideae), and 12 species of other Polypodiaceae representing the remaining four subfamilies are used to infer a phylogeny of the genus. Major results and conclusions of this study include: (1) Pyrrosia as currently circumscribed is paraphyletic in relation to Platycerium and can be divided into two genera: Pyrrosia s.s. and Hovenkampia (gen. nov.), with Hovenkampia and Platycerium forming a strongly supported clade sister to Pyrrosia s.s.; (2) Subfamily Platycerioideae should contain three genera only, Hovenkampia, Platycerium, and Pyrrosia s.s.; (3) Based on the molecular phylogeny, macromorphology, anatomical features, and spore morphology, four major clades in the genus are identified and three of the four are further resolved into four, four, and six subclades, respectively; (4) Three species, P. angustissima, P. foveolata, and P. mannii, not assigned to any groups by Hovenkamp (1986) because of their unusual morphology, each form monospecific clades; (5) Drymoglossum is not monophyletic and those species previously assigned to this genus are resolved in two different subclades; (6) Saxiglossum is resolved as the first lineage in the Niphopsis clade; and (7) The evolution of ten major morphological characters in the subfamily is inferred based on the phylogeny and various morphological synapomorphies for various clades and subclades are identified.
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Leptochilus oblongus (Polypodiaceae), a new fern species from northern Vietnam
Phytotaxa, 2015Co-Authors: Liang Zhang, Li-bing ZhangAbstract:A new fern species, Leptochilus oblongus of Polypodiaceae is described and illustrated from Hoa Binh Province, northern Vietnam. Leptochilus oblongus is most similar to L. ellipticus, but the sori of the former are oblong, close to the lobe margins, and parallel with costule . In contrast, those of the latter are linear, located on main lateral veins, and forming a ca. 45 degree angle with costule.
Ralf Knapp - One of the best experts on this subject based on the ideXlab platform.
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phylogeny and classification of the tribe lepisoreae Polypodiaceae pteridophyta with the description of a new genus ellipinema gen nov segregated from lepisorus
Molecular Phylogenetics and Evolution, 2020Co-Authors: Liang Zhang, Li-bing Zhang, Hang Sun, Xin-mao Zhou, Ralf Knapp, Zhenlong Liang, Xueping Fan, Minshu Song, Xinfen GaoAbstract:Lepisoroid ferns (tribe Lepisoreae, Polypodiaceae) are arguably one of the most confusing fern groups in Polypodiaceae in terms of delimitation of genera largely because of their simple morphology. Previous molecular studies either had very small taxon sampling of the non-Lepisorus genera and did not well resolve the relationships among these genera, or had a relatively large sampling at species level but the critical species were missing or their relationships were not well resolved. A recent study resolved the newly sampled Lepisorus jakonensis as sister to the remaining genera in Lepisoreae excluding Paragramma, and the authors lumped all the six well recognized genera into Lepisorus. In the present study, to infer a phylogeny we used DNA sequences of five plastid markers (matK, rbcL, rbcL-atpB, rps4 r (2) The Lepisorus jakonensis clade is confirmed to be the second earliest diverged lineage in Lepisoreae; (3) Neolepisorus is resolved as sister to the rest in a clade containing all non-Lepisorus genera except Paragramma; (4) Lemmaphyllum is sister to a clade containing Lepidomicrosorium, Neocheiropteris, and Tricholepidium; and (5) Ellipinema gen. nov. is segregated from Lepisorus based on the phylogeny and morphology in order to stabilize the current usage of the existing six non-Lepisorus genera and species names in these genera. A key to all eight genera of Lepisoreae is provided.
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A plastid phylogeny and character evolution of the Old World fern genus Pyrrosia (Polypodiaceae) with the description of a new genus: Hovenkampia (Polypodiaceae).
Molecular phylogenetics and evolution, 2017Co-Authors: Xin-mao Zhou, Liang Zhang, Cheng-wei Chen, Yao-moan Huang, De-kui Chen, Daniele Cicuzza, Ralf Knapp, Thien Tam LuongAbstract:The Old World fern genus Pyrrosia (Polypodiaceae) offers a rare system in ferns to study morphological evolution because almost all species of this genus are well studied for their morphology, anatomy, and spore features, and various hypotheses have been proposed in terms of the phylogeny and evolution in this genus. However, the molecular phylogeny of the genus lags behind. The monophyly of the genus has been uncertain and a modern phylogenetic study of the genus based on molecular data has been lacking. In the present study, DNA sequences of five plastid markers of 220 accessions of Polypodiaceae representing two species of Drymoglossum, 14 species of Platycerium, 50 species of Pyrrosia, and the only species of Saxiglossum (subfamily Platycerioideae), and 12 species of other Polypodiaceae representing the remaining four subfamilies are used to infer a phylogeny of the genus. Major results and conclusions of this study include: (1) Pyrrosia as currently circumscribed is paraphyletic in relation to Platycerium and can be divided into two genera: Pyrrosia s.s. and Hovenkampia (gen. nov.), with Hovenkampia and Platycerium forming a strongly supported clade sister to Pyrrosia s.s.; (2) Subfamily Platycerioideae should contain three genera only, Hovenkampia, Platycerium, and Pyrrosia s.s.; (3) Based on the molecular phylogeny, macromorphology, anatomical features, and spore morphology, four major clades in the genus are identified and three of the four are further resolved into four, four, and six subclades, respectively; (4) Three species, P. angustissima, P. foveolata, and P. mannii, not assigned to any groups by Hovenkamp (1986) because of their unusual morphology, each form monospecific clades; (5) Drymoglossum is not monophyletic and those species previously assigned to this genus are resolved in two different subclades; (6) Saxiglossum is resolved as the first lineage in the Niphopsis clade; and (7) The evolution of ten major morphological characters in the subfamily is inferred based on the phylogeny and various morphological synapomorphies for various clades and subclades are identified.