Systematics of the Octopleura Clade of Miconia (Melastomataceae: Miconieae) in Tropical America

Gamba-Moreno, Diana Lucía; Almeda, Frank

doi:10.11646/phytotaxa.179.1.1

“…Este conjunto de caracteres también se presenta en el género Tococa Aublet, que se diferencia de Miconia principalmente por la presencia de mirmecodomacios en ambas hojas y los pétalos emarginados apicalmente (Michelangeli, 2005). Sin embargo, y con base en filogenias moleculares, se reconoce que Miconia es un grupo parafilético, al igual que la mayoría de los géneros más diversos de la tribu (Michelangeli, et al, 2004Goldenberg, et al, 2008), razón por la cual se ha propuesto incluir a Tococa, así como a la mayoría de los géneros de Miconiaeae, dentro de Miconia (ver Michelangeli y Meier, 2013; Gamba y Almeda, 2014;Michelangeli, et al, 2016Michelangeli, et al, , 2018. doi: http://dx.doi.org/10.18257/raccefyn.848 Rev.…”

Section: Introductionunclassified

Una nueva especie de Miconia (Melastomataceae) con anteras connadas de Colombia

Mendoza-Cifuentes

¹

,

Posada-H

²

,

David

³

2019

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

3

0

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ResumenLa tribu Miconieae comprende cerca de 1.900 especies neotropicales y en recientes trabajos se propone solo un género para la tribu, Miconia, que incluye la totalidad de los géneros considerados previamente, entre los que se incluye el Tococa. En el presente trabajo se describe e ilustra una nueva especie bajo el género Miconia, que presenta anteras lateralmente connadas, procedente del departamento del Chocó, Colombia, la cual se asocia con las especies de la tribu Miconieae con anteras coherentes tales como Tococa symphyandra y Miconia croatii. Este nuevo taxón se identifica por el indumento de las ramas de tricomas elongados y alveolados, haz foliar bullada, el cáliz cerrado en botones y con grandes dientes dorsales, los pétalos y el estilo más grandes que las anteriores especies, y el ápice del ovario truncado. Crece en áreas muy húmedas de bosque subandino en la región central de la cordillera Occidental y hasta ahora solo se conoce de la localidad tipo. A new species of Miconia (Melastomataceae) with connate anthers from Colombia AbstractThe Miconieae tribe comprises about 1,900 Neotropical species and recent studies propose only one genus for the tribe, Miconia, which includes all of the genera previously considered including Tococa. Here we describe and illustrate a new species of the genus Miconia with lateral connate anthers from the department of Chocó, Colombia. This new taxon is associated with the species of the Miconieae tribe with laterally coherent anthers in a ring stamens such as Tococa symphyandra and Miconia croatii. This new taxon is characterized by the indument on branches with elongate and alveolate trichomes, bullate leaves, closed calyx in buds and with large dorsal teeth, bigger petals and style, and a truncated ovary apex. This new species grows in very humid areas of the sub-Andean forest in the central region of the Western Cordillera and at present, it is known only from the type locality.

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“…Early studies have consolidated the sister relationship of Olisbeoideae and the remaining Melastomataceae, settling on the currently accepted family circumscription (Conti, Litt & Systma, 1996;APG, 1998; but see Clausing & Renner, 2001 for a different perspective). Latter studies focused in some tribal re-arrangements (Fritsch et al, 2004;Penneys et al, 2010, Michelangeli et al, 2011, generic placement (Amorim, Goldenberg & Michelangeli, 2009;Goldenberg et al, 2012;Michelangeli, Ulloa & Sosa, 2014;Goldenberg et al, 2015;Kriebel, 2016;Rocha et al, 2016;Zeng et al, 2016), phylogenetic evaluation of higher species-rich lineages (Michelangeli et al, 2004, Stone, 2006Goldenberg et al, 2008;Martin et al, 2008;Michelangeli et al, 2013), and lower taxon phylogenies (Bécquer-Granados et al, 2008;Reginato, Michelangeli & Goldenberg, 2010;Penneys, 2013;Kriebel, Michelangeli & Kelly, 2015;Gamba-Moreno & Almeda, 2014;Majure et al, 2015;Reginato & Michelangeli, 2016). Even in family-wide phylogenies, the level of variation across these few sampled plastid markers is unsatisfactory, as evidenced by low statistical support among many relationships in different published analyses.…”

Section: Introductionmentioning

confidence: 99%

Peer Review #2 of "The first complete plastid genomes of Melastomataceae are highly structurally conserved (v0.1)"

2016

0

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Background. In the past three decades, several studies have predominantly relied on a small sample of the plastome to infer deep phylogenetic relationships in the species-rich Melastomataceae. Here, we report the first full plastid sequences of this family, compare general features of the sampled plastomes to other sequenced Myrtales, and survey the plastomes for highly informative regions for phylogenetics. Methods. Genome skimming was performed for 16 species spread across the Melastomataceae. Plastomes were assembled, annotated and compared to eight sequenced plastids in the Myrtales. Phylogenetic inference was performed using Maximum Likelihood on six different data sets, where putative biases were taken into account. Summary statistics were generated for all introns and intergenic spacers with suitable size for PCR amplification and used to rank the markers by phylogenetic information. Results. The majority of the plastomes sampled are conserved in gene content and order, as well as in sequence length and GC content within plastid regions and sequence classes. Departures include the putative presence of rps16 and rpl2 pseudogenes in some plastomes. Phylogenetic analyses of the majority of the schemes analyzed resulted in the same topology with high values of bootstrap support. Although there is still uncertainty in some relationships, in the highest supported topologies only two nodes received bootstrap values lower than 95%. Discussion. Melastomataceae plastomes are no exception for the general patterns observed in the genomic structure of land plant chloroplasts, being highly conserved and structurally similar to most other Myrtales. Despite the fact that the full plastome phylogeny shares most of the clades with the previously widely used and reduced data set, some changes are still observed and bootstrap support is higher. The plastome data set presented here is a step towards phylogenomic analyses in the Melastomataceae and will be a useful resource for future studies.

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“…Early studies have consolidated the sister relationship of Olisbeoideae and the remaining Melastomataceae, settling on the currently accepted family circumscription (Conti, Litt & Systma, 1996;APG, 1998; but see Clausing & Renner, 2001 for a different perspective). Latter studies focused in some tribal re-arrangements (Fritsch et al, 2004;Penneys et al, 2010, Michelangeli et al, 2011, generic placement (Amorim, Goldenberg & Michelangeli, 2009;Goldenberg et al, 2012;Michelangeli, Ulloa & Sosa, 2014;Goldenberg et al, 2015;Kriebel, 2016;Rocha et al, 2016;Zeng et al, 2016), phylogenetic evaluation of higher species-rich lineages (Michelangeli et al, 2004, Stone, 2006Goldenberg et al, 2008;Martin et al, 2008;Michelangeli et al, 2013), and lower taxon phylogenies (Bécquer-Granados et al, 2008;Reginato, Michelangeli & Goldenberg, 2010;Penneys, 2013;Kriebel, Michelangeli & Kelly, 2015;Gamba-Moreno & Almeda, 2014;Majure et al, 2015;Reginato & Michelangeli, 2016). Even in family-wide phylogenies, the level of variation across these few sampled plastid markers is unsatisfactory, as evidenced by low statistical support among many relationships in different published analyses.…”

Section: Introductionmentioning

confidence: 99%

Peer Review #1 of "The first complete plastid genomes of Melastomataceae are highly structurally conserved (v0.1)"

Kerr¹

2016

0

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Background. In the past three decades, several studies have predominantly relied on a small sample of the plastome to infer deep phylogenetic relationships in the species-rich Melastomataceae. Here, we report the first full plastid sequences of this family, compare general features of the sampled plastomes to other sequenced Myrtales, and survey the plastomes for highly informative regions for phylogenetics. Methods. Genome skimming was performed for 16 species spread across the Melastomataceae. Plastomes were assembled, annotated and compared to eight sequenced plastids in the Myrtales. Phylogenetic inference was performed using Maximum Likelihood on six different data sets, where putative biases were taken into account. Summary statistics were generated for all introns and intergenic spacers with suitable size for PCR amplification and used to rank the markers by phylogenetic information. Results. The majority of the plastomes sampled are conserved in gene content and order, as well as in sequence length and GC content within plastid regions and sequence classes. Departures include the putative presence of rps16 and rpl2 pseudogenes in some plastomes. Phylogenetic analyses of the majority of the schemes analyzed resulted in the same topology with high values of bootstrap support. Although there is still uncertainty in some relationships, in the highest supported topologies only two nodes received bootstrap values lower than 95%. Discussion. Melastomataceae plastomes are no exception for the general patterns observed in the genomic structure of land plant chloroplasts, being highly conserved and structurally similar to most other Myrtales. Despite the fact that the full plastome phylogeny shares most of the clades with the previously widely used and reduced data set, some changes are still observed and bootstrap support is higher. The plastome data set presented here is a step towards phylogenomic analyses in the Melastomataceae and will be a useful resource for future studies.

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Systematics of the Octopleura Clade of Miconia (Melastomataceae: Miconieae) in Tropical America

Cited by 24 publications

References 58 publications

Una nueva especie de Miconia (Melastomataceae) con anteras connadas de Colombia

Una nueva especie de Miconia (Melastomataceae) con anteras connadas de Colombia

Peer Review #2 of "The first complete plastid genomes of Melastomataceae are highly structurally conserved (v0.1)"

Peer Review #1 of "The first complete plastid genomes of Melastomataceae are highly structurally conserved (v0.1)"

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