Phylogenetics of Gratioleae (Plantaginaceae) : paraphyly of Stemodia and its implications for generic circumscriptions, with insights from floral evolution

Gratioleae are the most species-rich tribe of Plantaginaceae in the tropics, spanning c. 30 genera and > 300 species, with a wide range of morphological variation and ecological strategies. As a first effort towards a phylogenetic classification of Gratioleae we generated a new phylogenetic hypot...

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Autores principales: Scatigna, André Vito, Castro Souza, Vinicius, Sosa, María de las Mercedes, Dalla Colletta, Gabriel, Moura Machado, Raquel, Olmos Simões, André
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Publicado: Wiley Blackwell Publishing, Inc 2025
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/59958
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spelling I48-R184-123456789-599582025-12-15T15:20:18Z Phylogenetics of Gratioleae (Plantaginaceae) : paraphyly of Stemodia and its implications for generic circumscriptions, with insights from floral evolution Scatigna, André Vito Castro Souza, Vinicius Sosa, María de las Mercedes Dalla Colletta, Gabriel Moura Machado, Raquel Olmos Simões, André Gratioleae are the most species-rich tribe of Plantaginaceae in the tropics, spanning c. 30 genera and > 300 species, with a wide range of morphological variation and ecological strategies. As a first effort towards a phylogenetic classification of Gratioleae we generated a new phylogenetic hypothesis with improved taxa sampling, based on one nuclear and three plastid markers, using maximum parsimony and Bayesian inference approaches, and performed ancestral state reconstructions of ten morphological characters of flowers. The paraphyly of Stemodia s.l. was corroborated with members being retrieved in four clades; Bacopa, Conobea, Leucospora and Schistophragma are non-monophyletic. As actions towards recognizing only monophyletic genera in Gratioleae, we propose Stemodia s.s. as a monophyletic and morphological cohesive group, describe Umbraria as a new genus to accommodate two species segregated from Stemodia, transfer Stemodia vandelliodes to Darcya, merge Conobea with Bacopa and re-establish the names Chodaphyton ericifolium and Geochorda glechomoides. Traits used to define Stemodia s.l. are plesiomorphic in the tribe; the flower type (composed of seven floral characters) constitutes a good diagnostic set of traits for almost all genera in the tribe. Our study sheds light on the urgent need to reassess generic circumscriptions towards a unified classification in Gratioleae. 2025-12-15T14:21:34Z 2025-12-15T14:21:34Z 2022 Artículo Scatigna, André Vito, et al., 2022. Phylogenetics of Gratioleae (Plantaginaceae) : paraphyly of Stemodia and its implications for generic circumscriptions, with insights from floral evolution. Reino Unido: Wiley Blackwell Publishing, Inc, vol. 200, no. 2, p. 1-24. E-ISSN 1095-8339. 0024-4074 http://repositorio.unne.edu.ar/handle/123456789/59958 eng https://academic.oup.com/botlinnean/article/200/2/194/6554044?searchresult=1&login=false openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 1-24 application/pdf Wiley Blackwell Publishing, Inc Botanical Journal of the Linnean Society, 2022, vol. 200, no. 2, p. 1-24.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
description Gratioleae are the most species-rich tribe of Plantaginaceae in the tropics, spanning c. 30 genera and > 300 species, with a wide range of morphological variation and ecological strategies. As a first effort towards a phylogenetic classification of Gratioleae we generated a new phylogenetic hypothesis with improved taxa sampling, based on one nuclear and three plastid markers, using maximum parsimony and Bayesian inference approaches, and performed ancestral state reconstructions of ten morphological characters of flowers. The paraphyly of Stemodia s.l. was corroborated with members being retrieved in four clades; Bacopa, Conobea, Leucospora and Schistophragma are non-monophyletic. As actions towards recognizing only monophyletic genera in Gratioleae, we propose Stemodia s.s. as a monophyletic and morphological cohesive group, describe Umbraria as a new genus to accommodate two species segregated from Stemodia, transfer Stemodia vandelliodes to Darcya, merge Conobea with Bacopa and re-establish the names Chodaphyton ericifolium and Geochorda glechomoides. Traits used to define Stemodia s.l. are plesiomorphic in the tribe; the flower type (composed of seven floral characters) constitutes a good diagnostic set of traits for almost all genera in the tribe. Our study sheds light on the urgent need to reassess generic circumscriptions towards a unified classification in Gratioleae.
format Artículo
author Scatigna, André Vito
Castro Souza, Vinicius
Sosa, María de las Mercedes
Dalla Colletta, Gabriel
Moura Machado, Raquel
Olmos Simões, André
spellingShingle Scatigna, André Vito
Castro Souza, Vinicius
Sosa, María de las Mercedes
Dalla Colletta, Gabriel
Moura Machado, Raquel
Olmos Simões, André
Phylogenetics of Gratioleae (Plantaginaceae) : paraphyly of Stemodia and its implications for generic circumscriptions, with insights from floral evolution
author_facet Scatigna, André Vito
Castro Souza, Vinicius
Sosa, María de las Mercedes
Dalla Colletta, Gabriel
Moura Machado, Raquel
Olmos Simões, André
author_sort Scatigna, André Vito
title Phylogenetics of Gratioleae (Plantaginaceae) : paraphyly of Stemodia and its implications for generic circumscriptions, with insights from floral evolution
title_short Phylogenetics of Gratioleae (Plantaginaceae) : paraphyly of Stemodia and its implications for generic circumscriptions, with insights from floral evolution
title_full Phylogenetics of Gratioleae (Plantaginaceae) : paraphyly of Stemodia and its implications for generic circumscriptions, with insights from floral evolution
title_fullStr Phylogenetics of Gratioleae (Plantaginaceae) : paraphyly of Stemodia and its implications for generic circumscriptions, with insights from floral evolution
title_full_unstemmed Phylogenetics of Gratioleae (Plantaginaceae) : paraphyly of Stemodia and its implications for generic circumscriptions, with insights from floral evolution
title_sort phylogenetics of gratioleae (plantaginaceae) : paraphyly of stemodia and its implications for generic circumscriptions, with insights from floral evolution
publisher Wiley Blackwell Publishing, Inc
publishDate 2025
url http://repositorio.unne.edu.ar/handle/123456789/59958
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