Sotoa, a new genus of Spiranthinae (Orchidaceae) from Mexico and the southern United States

Generic placement of “Deiregyne” confusa and “D.” durangesis has been inconsistent among several recent classifications of subtribe Spiranthinae based mainly on floral characters. In this work, we assessed the systematic position of these two species by means of cladistic parsimony analyses of nucle...

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Autores principales:	Salazar, Gerardo, Ballesteros-Barrera, Claudia
Formato:	Online
Idioma:	eng
Publicado:	Universidad de Costa Rica 2010
Acceso en línea:	https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/52260

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spelling	LANKESTERIANA522602022-08-26T15:08:18Z Sotoa, a new genus of Spiranthinae (Orchidaceae) from Mexico and the southern United States Sotoa, a new genus of Spiranthinae (Orchidaceae) from Mexico and the southern United States Salazar, Gerardo Ballesteros-Barrera, Claudia Molecular phylogenetics niche modeling Orchidaceae Sotoa Spiranthinae Generic placement of “Deiregyne” confusa and “D.” durangesis has been inconsistent among several recent classifications of subtribe Spiranthinae based mainly on floral characters. In this work, we assessed the systematic position of these two species by means of cladistic parsimony analyses of nuclear (nrITS) and plastid (trnL-trnF) DNA sequences of 36 species/21 genera of Spiranthinae. Additionally, perceived differences in habitat preference between the two species were evaluated using geographic information system and niche modeling tools. Our results show that, in spite of their striking similarity in overall flower morphology, “D.” confusa and “D.” durangensis are only distantly related to one another. Instead, the former species is strongly supported as sister to Svenkoeltzia, whereas the latter groups with Schiedeella. Niche modeling revealed noticeable differences in the two species’ ecological preferences; no overlap of their potential distribution areas (as inferred using the Maxent modeling method) was predicted. A new monotypic genus, Sotoa, is proposed to accommodate “Deiregyne” confusa on the basis of genetic, morphological and (inferred) reproductive differences from other genera of the subtribe. The main morphological feature distinguishing Sotoa from other Spiranthinae is the folding of the bottom surface of the nectary, which is deeply concave from outside, resulting in an internally convex surface that is covered by dense pubescence. Generic placement of “Deiregyne” confusa and “D.” durangesis has been inconsistent among several recent classifications of subtribe Spiranthinae based mainly on floral characters. In this work, we assessed the systematic position of these two species by means of cladistic parsimony analyses of nuclear (nrITS) and plastid (trnL-trnF) DNA sequences of 36 species/21 genera of Spiranthinae. Additionally, perceived differences in habitat preference between the two species were evaluated using geographic information system and niche modeling tools. Our results show that, in spite of their striking similarity in overall flower morphology, “D.” confusa and “D.” durangensis are only distantly related to one another. Instead, the former species is strongly supported as sister to Svenkoeltzia, whereas the latter groups with Schiedeella. Niche modeling revealed noticeable differences in the two species’ ecological preferences; no overlap of their potential distribution areas (as inferred using the Maxent modeling method) was predicted. A new monotypic genus, Sotoa, is proposed to accommodate “Deiregyne” confusa on the basis of genetic, morphological and (inferred) reproductive differences from other genera of the subtribe. The main morphological feature distinguishing Sotoa from other Spiranthinae is the folding of the bottom surface of the nectary, which is deeply concave from outside, resulting in an internally convex surface that is covered by dense pubescence. Universidad de Costa Rica 2010-01-04 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/52260 10.15517/lank.v9i3.52260 Lankesteriana: International Journal on Orchidology; 2009: Lankesteriana: Volumen 9, Número 3; 491—504 Lankesteriana: International Journal on Orchidology; 2009: Lankesteriana: Volumen 9, Número 3; 491—504 2215-2067 1409-3871 eng https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/52260/52447 Copyright (c) 2010 Lankesteriana: International Journal on Orchidology
institution	Universidad de Costa Rica
collection	Lankesteriana: International Journal on Orchidology
language	eng
format	Online
author	Salazar, Gerardo Ballesteros-Barrera, Claudia
spellingShingle	Salazar, Gerardo Ballesteros-Barrera, Claudia Sotoa, a new genus of Spiranthinae (Orchidaceae) from Mexico and the southern United States
author_facet	Salazar, Gerardo Ballesteros-Barrera, Claudia
author_sort	Salazar, Gerardo
description	Generic placement of “Deiregyne” confusa and “D.” durangesis has been inconsistent among several recent classifications of subtribe Spiranthinae based mainly on floral characters. In this work, we assessed the systematic position of these two species by means of cladistic parsimony analyses of nuclear (nrITS) and plastid (trnL-trnF) DNA sequences of 36 species/21 genera of Spiranthinae. Additionally, perceived differences in habitat preference between the two species were evaluated using geographic information system and niche modeling tools. Our results show that, in spite of their striking similarity in overall flower morphology, “D.” confusa and “D.” durangensis are only distantly related to one another. Instead, the former species is strongly supported as sister to Svenkoeltzia, whereas the latter groups with Schiedeella. Niche modeling revealed noticeable differences in the two species’ ecological preferences; no overlap of their potential distribution areas (as inferred using the Maxent modeling method) was predicted. A new monotypic genus, Sotoa, is proposed to accommodate “Deiregyne” confusa on the basis of genetic, morphological and (inferred) reproductive differences from other genera of the subtribe. The main morphological feature distinguishing Sotoa from other Spiranthinae is the folding of the bottom surface of the nectary, which is deeply concave from outside, resulting in an internally convex surface that is covered by dense pubescence.
title	Sotoa, a new genus of Spiranthinae (Orchidaceae) from Mexico and the southern United States
title_short	Sotoa, a new genus of Spiranthinae (Orchidaceae) from Mexico and the southern United States
title_full	Sotoa, a new genus of Spiranthinae (Orchidaceae) from Mexico and the southern United States
title_fullStr	Sotoa, a new genus of Spiranthinae (Orchidaceae) from Mexico and the southern United States
title_full_unstemmed	Sotoa, a new genus of Spiranthinae (Orchidaceae) from Mexico and the southern United States
title_sort	sotoa, a new genus of spiranthinae (orchidaceae) from mexico and the southern united states
title_alt	Sotoa, a new genus of Spiranthinae (Orchidaceae) from Mexico and the southern United States
publisher	Universidad de Costa Rica
publishDate	2010
url	https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/52260
work_keys_str_mv	AT salazargerardo sotoaanewgenusofspiranthinaeorchidaceaefrommexicoandthesouthernunitedstates AT ballesterosbarreraclaudia sotoaanewgenusofspiranthinaeorchidaceaefrommexicoandthesouthernunitedstates
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Sotoa, a new genus of Spiranthinae (Orchidaceae) from Mexico and the southern United States

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