Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil

Autores
Salas, Roberto Manuel; Viana, Pedro Lage; Cabral, Elsa Leonor; Dessein, Steven; Janssens, Steven
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Salas, Roberto Manuel. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina.
Fil: Salas, Roberto Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.
Fil: Viana, Pedro Lage. Museo Paraense Emílio Goeldi; Brasil.
Fil: Cabral, Elsa Leonor. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina.
Fil: Cabral, Elsa Leonor. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.
Fil: Dessein, Steven. Botanic Garden Meise; Bélgica.
Fil: Janssens, Steven. Botanic Garden Meise; Bélgica.
Carajasia is described as a new genus of Rubiaceae. It is so far known only from the mountain summits of Serra dos Carajás (Pará, Brazil), where it is part of a shrubby vegetation surrounded by tropical rainforest. The new genus belongs to the tribe Spermacoceae and is positioned within it to the Spermacoce clade. Carajasia is unique within the clade in having a very particular combination of characters: flowering branches with two axillary flowers per node, homostylous flowers, corollas with a fringe of moniliform hairs, pubescent styles with distinct stigma lobes, bilobed nectariferous discs covered by triangular papillae, pollen with a double reticulum and fruits with a peculiar type of dehiscence. A detailed description of Carajasia is presented, including observations of the fruit and pollen, along with distribution maps and images of the plant in its habitat. A dichotomous key to distinguish Carajasia from other genera with deeply divided stigmas is provided. A molecular phylogenetic study was carried out using ITS and ETS sequences to determine the phylogenetic position of the new genus within the Spermacoce clade. The results of the combined analyses demonstrated that Carajasia is sister to Galianthe with moderate to high support. Both genera form a weakly supported clade with Schwendenera. This clade is sister to the other genera of the Spermacoce clade studied in this work. Galianthe and Schwendenera share with Carajasia pollen with a double reticulum, but they are clearly differentiated by suffruticose habit, heterostylous flowers and the pattern of fruit dehiscence. To clarify the phylogenetic position of Carajasia, some morphological characters are discussed based on the molecular results: division of the stigma, pollen types and floral syndrome.
Fuente
Phytotaxa, 2015, vol. 206, no. 1, p. 14-29.
Materia
Galianthe
Spermacoce clade
Spermacoceae
phylogeny
taxonomy
pollen
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
Institución
Universidad Nacional del Nordeste
OAI Identificador
oai:repositorio.unne.edu.ar:123456789/28528

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network_acronym_str RIUNNE
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network_name_str Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
spelling Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, BrazilSalas, Roberto ManuelViana, Pedro LageCabral, Elsa LeonorDessein, StevenJanssens, StevenGaliantheSpermacoce cladeSpermacoceaephylogenytaxonomypollenFil: Salas, Roberto Manuel. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina.Fil: Salas, Roberto Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.Fil: Viana, Pedro Lage. Museo Paraense Emílio Goeldi; Brasil.Fil: Cabral, Elsa Leonor. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina.Fil: Cabral, Elsa Leonor. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.Fil: Dessein, Steven. Botanic Garden Meise; Bélgica.Fil: Janssens, Steven. Botanic Garden Meise; Bélgica.Carajasia is described as a new genus of Rubiaceae. It is so far known only from the mountain summits of Serra dos Carajás (Pará, Brazil), where it is part of a shrubby vegetation surrounded by tropical rainforest. The new genus belongs to the tribe Spermacoceae and is positioned within it to the Spermacoce clade. Carajasia is unique within the clade in having a very particular combination of characters: flowering branches with two axillary flowers per node, homostylous flowers, corollas with a fringe of moniliform hairs, pubescent styles with distinct stigma lobes, bilobed nectariferous discs covered by triangular papillae, pollen with a double reticulum and fruits with a peculiar type of dehiscence. A detailed description of Carajasia is presented, including observations of the fruit and pollen, along with distribution maps and images of the plant in its habitat. A dichotomous key to distinguish Carajasia from other genera with deeply divided stigmas is provided. A molecular phylogenetic study was carried out using ITS and ETS sequences to determine the phylogenetic position of the new genus within the Spermacoce clade. The results of the combined analyses demonstrated that Carajasia is sister to Galianthe with moderate to high support. Both genera form a weakly supported clade with Schwendenera. This clade is sister to the other genera of the Spermacoce clade studied in this work. Galianthe and Schwendenera share with Carajasia pollen with a double reticulum, but they are clearly differentiated by suffruticose habit, heterostylous flowers and the pattern of fruit dehiscence. To clarify the phylogenetic position of Carajasia, some morphological characters are discussed based on the molecular results: division of the stigma, pollen types and floral syndrome.Magnolia Press2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfSalas, Roberto Manuel, et al., 2015. Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil. Phytotaxa. Auckland: Magnolia Press, vol. 206, no. 1, p. 14-29. ISSN 1179-3163.1179-3155http://repositorio.unne.edu.ar/handle/123456789/28528Phytotaxa, 2015, vol. 206, no. 1, p. 14-29.reponame:Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)instname:Universidad Nacional del Nordesteenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/2.5/ar/Atribución-NoComercial-SinDerivadas 2.5 Argentina2025-09-04T11:14:13Zoai:repositorio.unne.edu.ar:123456789/28528instacron:UNNEInstitucionalhttp://repositorio.unne.edu.ar/Universidad públicaNo correspondehttp://repositorio.unne.edu.ar/oaiososa@bib.unne.edu.ar;sergio.alegria@unne.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:48712025-09-04 11:14:13.313Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) - Universidad Nacional del Nordestefalse
dc.title.none.fl_str_mv Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil
title Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil
spellingShingle Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil
Salas, Roberto Manuel
Galianthe
Spermacoce clade
Spermacoceae
phylogeny
taxonomy
pollen
title_short Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil
title_full Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil
title_fullStr Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil
title_full_unstemmed Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil
title_sort Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil
dc.creator.none.fl_str_mv Salas, Roberto Manuel
Viana, Pedro Lage
Cabral, Elsa Leonor
Dessein, Steven
Janssens, Steven
author Salas, Roberto Manuel
author_facet Salas, Roberto Manuel
Viana, Pedro Lage
Cabral, Elsa Leonor
Dessein, Steven
Janssens, Steven
author_role author
author2 Viana, Pedro Lage
Cabral, Elsa Leonor
Dessein, Steven
Janssens, Steven
author2_role author
author
author
author
dc.subject.none.fl_str_mv Galianthe
Spermacoce clade
Spermacoceae
phylogeny
taxonomy
pollen
topic Galianthe
Spermacoce clade
Spermacoceae
phylogeny
taxonomy
pollen
dc.description.none.fl_txt_mv Fil: Salas, Roberto Manuel. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina.
Fil: Salas, Roberto Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.
Fil: Viana, Pedro Lage. Museo Paraense Emílio Goeldi; Brasil.
Fil: Cabral, Elsa Leonor. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina.
Fil: Cabral, Elsa Leonor. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.
Fil: Dessein, Steven. Botanic Garden Meise; Bélgica.
Fil: Janssens, Steven. Botanic Garden Meise; Bélgica.
Carajasia is described as a new genus of Rubiaceae. It is so far known only from the mountain summits of Serra dos Carajás (Pará, Brazil), where it is part of a shrubby vegetation surrounded by tropical rainforest. The new genus belongs to the tribe Spermacoceae and is positioned within it to the Spermacoce clade. Carajasia is unique within the clade in having a very particular combination of characters: flowering branches with two axillary flowers per node, homostylous flowers, corollas with a fringe of moniliform hairs, pubescent styles with distinct stigma lobes, bilobed nectariferous discs covered by triangular papillae, pollen with a double reticulum and fruits with a peculiar type of dehiscence. A detailed description of Carajasia is presented, including observations of the fruit and pollen, along with distribution maps and images of the plant in its habitat. A dichotomous key to distinguish Carajasia from other genera with deeply divided stigmas is provided. A molecular phylogenetic study was carried out using ITS and ETS sequences to determine the phylogenetic position of the new genus within the Spermacoce clade. The results of the combined analyses demonstrated that Carajasia is sister to Galianthe with moderate to high support. Both genera form a weakly supported clade with Schwendenera. This clade is sister to the other genera of the Spermacoce clade studied in this work. Galianthe and Schwendenera share with Carajasia pollen with a double reticulum, but they are clearly differentiated by suffruticose habit, heterostylous flowers and the pattern of fruit dehiscence. To clarify the phylogenetic position of Carajasia, some morphological characters are discussed based on the molecular results: division of the stigma, pollen types and floral syndrome.
description Fil: Salas, Roberto Manuel. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv Salas, Roberto Manuel, et al., 2015. Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil. Phytotaxa. Auckland: Magnolia Press, vol. 206, no. 1, p. 14-29. ISSN 1179-3163.
1179-3155
http://repositorio.unne.edu.ar/handle/123456789/28528
identifier_str_mv Salas, Roberto Manuel, et al., 2015. Carajasia (rubiaceae), a new endangered genus from carajás mountain range, Pará, Brazil. Phytotaxa. Auckland: Magnolia Press, vol. 206, no. 1, p. 14-29. ISSN 1179-3163.
1179-3155
url http://repositorio.unne.edu.ar/handle/123456789/28528
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Atribución-NoComercial-SinDerivadas 2.5 Argentina
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Atribución-NoComercial-SinDerivadas 2.5 Argentina
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Magnolia Press
publisher.none.fl_str_mv Magnolia Press
dc.source.none.fl_str_mv Phytotaxa, 2015, vol. 206, no. 1, p. 14-29.
reponame:Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
instname:Universidad Nacional del Nordeste
reponame_str Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
collection Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
instname_str Universidad Nacional del Nordeste
repository.name.fl_str_mv Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) - Universidad Nacional del Nordeste
repository.mail.fl_str_mv ososa@bib.unne.edu.ar;sergio.alegria@unne.edu.ar
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