Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil

Autores
Salas, Roberto Manuel; Viana, Pedro L.; Cabral, Elsa Leonor; Dessein, Steven; Janssens, Steven
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Fil: Salas, Roberto Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Fil: Viana, Pedro L.. Museu Paraense Emílio Goeldi; Brasil
Fil: Cabral, Elsa Leonor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Fil: Dessein, Steven. Botanic Garden Meise; Bélgica
Fil: Janssens, Steven. Botanic Garden Meise; Bélgica
Materia
Galianthe
Spermacoce Clade
Filogenia
Taxonomia
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/30003
Acceder
id CONICETDig_bb5504d313d8cf3ce7c49891890d1bac
oai_identifier_str oai:ri.conicet.gov.ar:11336/30003
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, BrazilSalas, Roberto ManuelViana, Pedro L.Cabral, Elsa LeonorDessein, StevenJanssens, StevenGaliantheSpermacoce CladeFilogeniaTaxonomiahttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Carajasia 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.Fil: Salas, Roberto Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: Viana, Pedro L.. Museu Paraense Emílio Goeldi; BrasilFil: Cabral, Elsa Leonor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; ArgentinaFil: Dessein, Steven. Botanic Garden Meise; BélgicaFil: Janssens, Steven. Botanic Garden Meise; BélgicaMagnolia Press2015-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/30003Salas, Roberto Manuel; Viana, Pedro L.; Cabral, Elsa Leonor; Dessein, Steven; Janssens, Steven; Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil; Magnolia Press; Phytotaxa; 206; 1; 5-2015; 14-291179-31551179-3163CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://biotaxa.org/Phytotaxa/article/view/phytotaxa.206.1.4info:eu-repo/semantics/altIdentifier/doi/10.11646/phytotaxa.206.1.4info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:45:49Zoai:ri.conicet.gov.ar:11336/30003instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:45:49.395CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil
title Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil
spellingShingle Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil
Salas, Roberto Manuel
Galianthe
Spermacoce Clade
Filogenia
Taxonomia
title_short Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil
title_full Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil
title_fullStr Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil
title_full_unstemmed Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil
title_sort Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil
dc.creator.none.fl_str_mv Salas, Roberto Manuel
Viana, Pedro L.
Cabral, Elsa Leonor
Dessein, Steven
Janssens, Steven
author Salas, Roberto Manuel
author_facet Salas, Roberto Manuel
Viana, Pedro L.
Cabral, Elsa Leonor
Dessein, Steven
Janssens, Steven
author_role author
author2 Viana, Pedro L.
Cabral, Elsa Leonor
Dessein, Steven
Janssens, Steven
author2_role author
author
author
author
dc.subject.none.fl_str_mv Galianthe
Spermacoce Clade
Filogenia
Taxonomia
topic Galianthe
Spermacoce Clade
Filogenia
Taxonomia
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 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.
Fil: Salas, Roberto Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Fil: Viana, Pedro L.. Museu Paraense Emílio Goeldi; Brasil
Fil: Cabral, Elsa Leonor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina
Fil: Dessein, Steven. Botanic Garden Meise; Bélgica
Fil: Janssens, Steven. Botanic Garden Meise; Bélgica
description 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.
publishDate 2015
dc.date.none.fl_str_mv 2015-05
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 http://hdl.handle.net/11336/30003
Salas, Roberto Manuel; Viana, Pedro L.; Cabral, Elsa Leonor; Dessein, Steven; Janssens, Steven; Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil; Magnolia Press; Phytotaxa; 206; 1; 5-2015; 14-29
1179-3155
1179-3163
CONICET Digital
CONICET
url http://hdl.handle.net/11336/30003
identifier_str_mv Salas, Roberto Manuel; Viana, Pedro L.; Cabral, Elsa Leonor; Dessein, Steven; Janssens, Steven; Carajasia (Rubiaceae), a new and endangered genus from Carajás mountain range, Pará, Brazil; Magnolia Press; Phytotaxa; 206; 1; 5-2015; 14-29
1179-3155
1179-3163
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://biotaxa.org/Phytotaxa/article/view/phytotaxa.206.1.4
info:eu-repo/semantics/altIdentifier/doi/10.11646/phytotaxa.206.1.4
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
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 reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842268755613188096
score 13.13397

Publicaciones similares