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M. Amalia Scataglini - One of the best experts on this subject based on the ideXlab platform.

  • Further progress towards the delimitation of Cheilanthes (Cheilanthoideae, Pteridaceae), with emphasis on South American species
    Organisms Diversity & Evolution, 2018
    Co-Authors: M. Mónica Ponce, M. Amalia Scataglini
    Abstract:

    Cheilanthoid ferns (Cheilanthoideae sensu PPG 1 2016) constitute an important group within the Pteridaceae and are cosmopolitan in distribution. In South America, there are 155 species distributed in 13 genera, among which the largest are Adiantopsis (35), Cheilanthes (27), and Doryopteris (22). Most of the cheilanthoid species are morphologically adapted to grow in arid to semi-arid conditions and show convergent evolution, which has implied difficulties in defining the genera throughout their taxonomic history (Copeland 1947 , Tryon & Tryon 1973 , Gastony & Rollo 1995 , 1998 , Kirkpatrick Systematic Botany , 32 : 504–518, 2007 , Rothfels et al. Taxon , 57 : 712–724, 2008 ). Here, we sequenced two plastid markers ( rbcL  +  trnL - F ) of 33 South American cheilanthoid species, most of which have not been included in phylogenetic analyses previously. The South American species were analyzed together with South African and Australasian Cheilanthes and representatives of related cheilanthoid genera. The phylogenetic analysis showed that most Cheilanthes species are related to the genus Hemionitis , constituting different groups according to their distribution; moreover, three species— C. hassleri , C. pantanalensis , and C. obducta —appear as the sister clade of Hemionitis . Cheilanthes micropteris , the type species, is strongly supported in a clade with Australasian Cheilanthes plus five South American Cheilanthes species, all of which show a reduction in the number of spores per sporangium; this feature would be a synapomorphy for core Cheilanthes s.s. We found no support uniting other South American Cheilanthes to either the group of South African Cheilanthes or to core Cheilanthes s.s. On the other hand, C. geraniifolia , C. goyazensis , and C. bradei formed a clade related to Doryopteris that, with further study, could be considered as a new genus. The phylogenetic hypotheses presented here contribute substantially to the delimitation of Cheilanthes s.s. and related groups and provide the basis for re-examining the generic taxonomy.

M. Mónica Ponce - One of the best experts on this subject based on the ideXlab platform.

  • Further progress towards the delimitation of Cheilanthes (Cheilanthoideae, Pteridaceae), with emphasis on South American species
    Organisms Diversity & Evolution, 2018
    Co-Authors: M. Mónica Ponce, M. Amalia Scataglini
    Abstract:

    Cheilanthoid ferns (Cheilanthoideae sensu PPG 1 2016) constitute an important group within the Pteridaceae and are cosmopolitan in distribution. In South America, there are 155 species distributed in 13 genera, among which the largest are Adiantopsis (35), Cheilanthes (27), and Doryopteris (22). Most of the cheilanthoid species are morphologically adapted to grow in arid to semi-arid conditions and show convergent evolution, which has implied difficulties in defining the genera throughout their taxonomic history (Copeland 1947 , Tryon & Tryon 1973 , Gastony & Rollo 1995 , 1998 , Kirkpatrick Systematic Botany , 32 : 504–518, 2007 , Rothfels et al. Taxon , 57 : 712–724, 2008 ). Here, we sequenced two plastid markers ( rbcL  +  trnL - F ) of 33 South American cheilanthoid species, most of which have not been included in phylogenetic analyses previously. The South American species were analyzed together with South African and Australasian Cheilanthes and representatives of related cheilanthoid genera. The phylogenetic analysis showed that most Cheilanthes species are related to the genus Hemionitis , constituting different groups according to their distribution; moreover, three species— C. hassleri , C. pantanalensis , and C. obducta —appear as the sister clade of Hemionitis . Cheilanthes micropteris , the type species, is strongly supported in a clade with Australasian Cheilanthes plus five South American Cheilanthes species, all of which show a reduction in the number of spores per sporangium; this feature would be a synapomorphy for core Cheilanthes s.s. We found no support uniting other South American Cheilanthes to either the group of South African Cheilanthes or to core Cheilanthes s.s. On the other hand, C. geraniifolia , C. goyazensis , and C. bradei formed a clade related to Doryopteris that, with further study, could be considered as a new genus. The phylogenetic hypotheses presented here contribute substantially to the delimitation of Cheilanthes s.s. and related groups and provide the basis for re-examining the generic taxonomy.

  • A New Species and Two New Records of the Fern Genus Cheilanthes (Pteridaceae) from Southwestern Brazil
    American Fern Journal, 2008
    Co-Authors: M. Mónica Ponce, Elton Luis Monteiro De Assis, Paulo H. Labiak
    Abstract:

    Abstract Cheilanthes pantanalensis, a new species from the Brazilian Pantanal is described. A complete morphological description is presented, as well as illustrations and comments on the most similar species. This species is distinguished by its (2-)3-pinnate leaves and by having ultimate segments that are ovate to suborbicular. We also report Cheilanthes hassleri and C. obducta as new records for Brazil, both from Mato Grosso do Sul.

Kathleen M. Pryer - One of the best experts on this subject based on the ideXlab platform.

  • Baja: A New Monospecific Genus Segregated from Cheilanthes s. l. (Pteridaceae)
    Systematic Botany, 2019
    Co-Authors: Lisa O. George, Kathleen M. Pryer, Layne Huiet, Tzu-tong Kao, Michael D. Windham
    Abstract:

    The phylogenetic position of Cheilanthes brandegeei, a fern endemic to the Baja California Peninsula of Mexico, was investigated using three plastid markers (atpA, rbcL, trnG-R) and comparative morphology. Here we present robust evidence for the recognition of C. brandegeei as a member of the bommeriids, the sister clade to all other cheilanthoid ferns, and evidence that it is sister to all Bommeria species within that clade. Because of its distinctive morphology within the bommeriid clade (pinnate leaf architecture, well-developed pseudoindusium, and narrow, concolorous red-brown rhizome scales), here we propose the new genus Baja to accommodate it. Our results place Baja brandegeei together with other taxa that have a distribution in the Baja California Peninsula and mainland Mexico, rather than with hypothesized congeners in South America and Africa. Morphological characters traditionally used to classify this species as a Cheilanthes (patterns of sporangial distribution, presence of a well-developed pseudoindusium, and fractiferous petioles) are extensively homoplasious across cheilanthoids. We identify three characters that unite the newly expanded bommeriid clade: leaf indument of acicular trichomes, reticulate-cristate perispore morphology, and lateral initiation of the gametophyte meristem.

  • Gaga, a new fern genus segregated from Cheilanthes (pteridaceae)
    Systematic Botany, 2012
    Co-Authors: Kathleen M. Pryer, Michael D. Windham
    Abstract:

    Abstract Ongoing molecular phylogenetic studies of cheilanthoid ferns confirm that the genus Cheilanthes (Pteridaceae) is polyphyletic. A monophyletic group of species within the hemionitid clade informally called the “C. marginata group” is here shown to be distinct from its closest relatives (the genus Aspidotis) and phylogenetically distant from the type species of Cheilanthes. This group is here segregated from Cheilanthes as the newly described genus, Gaga . In this study, we use molecular data from four DNA regions (plastid: matK, rbcL, trnG-R; and nuclear: gapCp) together with spore data to circumscribe the morphological and geographical boundaries of the new genus and investigate reticulate evolution within the group. Gaga is distinguished from Aspidotis by its rounded to attenuate (vs. mucronate) segment apices, minutely bullate margins of mature leaves (vs. smooth at 40 ×), and less prominently lustrous and striate adaxial blade surfaces. The new genus is distinguished from Cheilanthes s. s. by ...

  • Gaga, a new fern genus segregated from Cheilanthes (pteridaceae)
    2012
    Co-Authors: Kathleen M. Pryer
    Abstract:

    Ongoing molecular phylogenetic studies of cheilanthoid ferns confirm that the genus Cheilanthes (Pteridaceae) is polyphyletic. A monophyletic group of species within the hemionitid clade informally called the "C. marginata group" is here shown to be distinct from its closest relatives (the genus Aspidotis) and phylogenetically distant from the type species of Cheilanthes. This group is here segregated from Cheilanthes as the newly described genus, Gaga . In this study, we use molecular data from four DNA regions (plastid: matK, rbcL, trnG-R; and nuclear: gapCp) together with spore data to circumscribe the morphological and geographical boundaries of the new genus and investigate reticulate evolution within the group. Gaga is distinguished from Aspidotis by its rounded to attenuate (vs. mucronate) segment apices, minutely bullate margins of mature leaves (vs. smooth at 40 ×), and less prominently lustrous and striate adaxial blade surfaces. The new genus is distinguished from Cheilanthes s. s. by its strongly differentiated, inframarginal pseudoindusia, the production of 64 small or 32 large spores (vs. 32 small or 16 large) per sporangium, and usually glabrous leaf blades. A total of nineteen species are recognized within Gaga; seventeen new combinations are made, and two new species, Gaga germanotta and Gaga monstraparva , are described. © Copyright 2012 by the American Society of Plant Taxonomists

  • DNA barcoding exposes a case of mistaken identity in the fern horticultural trade.
    Molecular ecology resources, 2010
    Co-Authors: Kathleen M. Pryer, Amanda L. Grusz, Carl J. Rothfels, Eric Schuettpelz, Layne Huiet, Tony Avent, David Schwartz, Michael D. Windham
    Abstract:

    Using cheilanthoid ferns, we provide an example of how DNA barcoding approaches can be useful to the horticultural community for keeping plants in the trade accurately identified. We use plastid rbcL, atpA, and trnG-R sequence data to demonstrate that a fern marketed as Cheilanthes wrightii (endemic to the southwestern USA and northern Mexico) in the horticultural trade is, in fact, Cheilanthes distans (endemic to Australia and adjacent islands). Public and private (accessible with permission) databases contain a wealth of DNA sequence data that are linked to vouchered plant material. These data have uses beyond those for which they were originally generated, and they provide an important resource for fostering collaborations between the academic and horticultural communities. We strongly advocate the barcoding approach as a valuable new technology available to the horticulture industry to help correct plant identification errors in the international trade.

  • Deciphering the origins of apomictic polyploids in the Cheilanthes yavapensis complex (Pteridaceae)
    American journal of botany, 2009
    Co-Authors: Amanda L. Grusz, Michael D. Windham, Kathleen M. Pryer
    Abstract:

    Deciphering species relationships and hybrid origins in polyploid agamic species complexes is notoriously diffi cult. In this study of cheilanthoid ferns, we demonstrate increased resolving power for clarifying the origins of polyploid lineages by integrating evidence from a diverse selection of biosystematic methods. The prevalence of polyploidy, hybridization, and apomixis in ferns suggests that these processes play a signifi cant role in their evolution and diversifi cation. Using a combination of systematic approaches, we investigated the origins of apomictic polyploids belonging to the Cheilanthes yavapensis complex. Spore studies allowed us to assess ploidy levels; plastid and nuclear DNA sequencing revealed evolutionary relationships and confi rmed the putative progenitors (both maternal and paternal) of taxa of hybrid origin; enzyme electrophoretic evidence provided information on genome dosage in allopolyploids. We fi nd here that the widespread apomictic triploid, Cheilanthes lindheimeri , is an autopolyploid derived from a rare, previously undetected sexual diploid. The apomictic triploid Cheilanthes wootonii is shown to be an interspecifi c hybrid between C. fendleri and C. lindheimeri , whereas the apomictic tetraploid C. yavapensis is comprised of two cryptic and geographically distinct lineages. We show that earlier morphology-based hypotheses of species relationships, while not altogether incorrect, only partially explain the complicated evolutionary history of these ferns.

Herrera Monsivais, María Concepción - One of the best experts on this subject based on the ideXlab platform.

  • COMPOSICIÓN TAXONÓMICA Y DATOS ECOLÓGICOS DE LAS LICOFITAS Y MONILOFITAS DE LA SIERRA DE TAMAULIPAS, TAMAULIPAS, MÉXICO
    Escuela Nacional de Ciencias Biológicas. Instituto Politécnico Nacional. México, 2017
    Co-Authors: Hernández-mendoza, Ana María, Arreguín Sánchez, María De La Luz, García Jiménez Jesús, Herrera Monsivais, María Concepción
    Abstract:

    En el presente estudio se enlistan las licofitas y monilofitas que habitan en la sierra de Tamaulipas, registrándose un total de 18 familias, 38 géneros, 91 especies y ocho variedades. La familia Pteridaceae es la más representativa tanto en géneros (13) como en especies (36), siendo el género Cheilanthes el más sobresaliente, además se registran por primera vez 23 taxones para el estado de Tamaulipas. Se recolectó una especie que se consideraba había desaparecido de la zona como es el caso de Schaffneria nigripes Fée, que desde hace 30 años no se había vuelto a encontrar. El único taxón endémico para el estado fue Notholaena brevistipes Mickel. Los ejemplares que se mencionan en el trabajo como Anemia sp., Elaphoglossum sp. y Selaginella hansenii Hieron. vel. aff., Cheilanthes eatonii Baker vel. aff. y Ch. lozanoi (Maxon) R.M. Tryon & A.F. Tryon podrían tratarse de nuevas especies. En este trabajo se incluye la distribución de las especies por tipos de vegetación, microhábitats y algunos datos ecológicos. Se identificaron cinco tipos de vegetación y tres asociaciones vegetales en el área de estudio

  • Composición taxonómica y datos ecológicos de las licofitas y monilofitas de la Sierra de Tamaulipas, Tamaulipas, México
    2015
    Co-Authors: Hernández, Ana Maria, Arreguín Sánchez, María De La Luz, García Jiménez Jesús, Herrera Monsivais, María Concepción
    Abstract:

    In the present study are recorded a total of 18 families, 38 genera, 91 species and eight varieties of lycophytes and monilophytes. The family Pteridaceae is the most representative with (13) genera and (36) species, being the genus Cheilanthes the best represented, also recorded for first time 23 taxa for the state of Tamaulipas. We collected Schaffneria nigripes Fée, a species that had not been seen more than 30 years ago in Tamaulipas. I was found as the only species endemic to Tamaulipas Notholaena brevistipes Mickel. The examples mentioned in this paper as Anemia sp., Elaphoglossum sp. and Selaginella hansenii Hieron. vel. aff., Cheilanthes eatonii Baker vel. aff. y Ch. lozanoi (Maxon) R.M. Tryon & A.F. Tryon could be considered new species. This work includes the distribution of species by vegetation types, micro-habitats and some ecological data. We identified five vegetation types and three plant associations in the study area.En el presente estudio se enlistan las licofitas y monilofitas que habitan en la sierra de Tamaulipas, registrándose un total de 18 familias, 38 géneros, 91 especies y ocho variedades. La familia Pteridaceae es la más representativa tanto en géneros (13) como en especies (36), siendo el género Cheilanthes el más sobresaliente, además se registran por primera vez 23 taxones para el estado de Tamaulipas. Se recolectó una especie que se consideraba había desaparecido de la zona como es el caso de Schaffneria nigripes Fée, que desde hace 30 años no se había vuelto a encontrar. El único taxón endémico para el estado fue Notholaena brevistipes Mickel. Los ejemplares que se mencionan en el trabajo como Anemia sp., Elaphoglossum sp. y Selaginella hansenii Hieron. vel. aff., Cheilanthes eatonii Baker vel. aff. y Ch. lozanoi (Maxon) R.M. Tryon & A.F. Tryon podrían tratarse de nuevas especies. En este trabajo se incluye la distribución de las especies por tipos de vegetación, microhábitats y algunos datos ecológicos. Se identificaron cinco tipos de vegetación y tres asociaciones vegetales en el área de estudio

Scataglini, María Amalia - One of the best experts on this subject based on the ideXlab platform.

  • Further progress towards the delimitation of Cheilanthes (Cheilanthoideae, Pteridaceae), with emphasis on South American species
    'Springer Science and Business Media LLC', 2018
    Co-Authors: Ponce, Marta Monica, Scataglini, María Amalia
    Abstract:

    Cheilanthoid ferns (Cheilanthoideae sensu PPG 1 2016) constitute an important group within the Pteridaceae and are cosmopolitan in distribution. In South America, there are 155 species distributed in 13 genera, among which the largest are Adiantopsis (35), Cheilanthes (27), and Doryopteris (22). Most of the cheilanthoid species are morphologically adapted to grow in arid to semi-arid conditions and show convergent evolution, which has implied difficulties in defining the genera throughout their taxonomic history (Copeland 1947, Tryon & Tryon 1973, Gastony & Rollo 1995, 1998, Kirkpatrick Systematic Botany, 32: 504–518, 2007, Rothfels et al. Taxon, 57: 712–724, 2008). Here, we sequenced two plastid markers (rbcL + trnL-F) of 33 South American cheilanthoid species, most of which have not been included in phylogenetic analyses previously. The South American species were analyzed together with South African and Australasian Cheilanthes and representatives of related cheilanthoid genera. The phylogenetic analysis showed that most Cheilanthes species are related to the genus Hemionitis, constituting different groups according to their distribution; moreover, three species—C. hassleri, C. pantanalensis, and C. obducta—appear as the sister clade of Hemionitis. Cheilanthes micropteris, the type species, is strongly supported in a clade with Australasian Cheilanthes plus five South American Cheilanthes species, all of which show a reduction in the number of spores per sporangium; this feature would be a synapomorphy for core Cheilanthes s.s. We found no support uniting other South American Cheilanthes to either the group of South African Cheilanthes or to core Cheilanthes s.s. On the other hand, C. geraniifolia, C. goyazensis, and C. bradei formed a clade related to Doryopteris that, with further study, could be considered as a new genus. The phylogenetic hypotheses presented here contribute substantially to the delimitation of Cheilanthes s.s. and related groups and provide the basis for re-examining the generic taxonomy.Fil: Ponce, Marta Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; ArgentinaFil: Scataglini, María Amalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; Argentin

  • Do two South American species of Cheilanthes (Pteridaceae) traditionally linked to the Cheilanthes marginata group, belong to Gaga?
    'Magnolia Press', 2016
    Co-Authors: Ponce, Marta Monica, Scataglini, María Amalia
    Abstract:

    The phylogenetic positions of Cheilanthes hieronymi and C. poeppgiana are tested using DNA sequences of plastid matK and rbcL markers. These South American species are historically linked to Cheilanthes marginata, now transferred to the new genus Gaga. The results showed that C. hieronymi and C. poeppgiana are located outside Gaga. The study corroborated that the morphological similarities between the two species and the genus Gaga were resulted from convergencesFil: Ponce, Marta Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; ArgentinaFil: Scataglini, María Amalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; Argentin