On the taxonomy and nomenclature of the annual species of the Brachypodium distachyon grass complex (Gramineae, Pooideae)

The taxonomy and nomenclature of the type material potentially linked to the three recognized annual species of the grass genus Brachypodium (B. distachyon, B. stacei, B. hybridum) have been investigated. We performed a statistical discriminant analysis of twelve quantitative morphological traits on...

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Autores: Ferrer Gallego, P. Pablo, Fabado, Javier, Catalán, Pilar
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:163748
Acceso en línea:http://zaguan.unizar.es/record/163748
Access Level:acceso abierto
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spelling On the taxonomy and nomenclature of the annual species of the Brachypodium distachyon grass complex (Gramineae, Pooideae)Ferrer Gallego, P. PabloFabado, JavierCatalán, PilarThe taxonomy and nomenclature of the type material potentially linked to the three recognized annual species of the grass genus Brachypodium (B. distachyon, B. stacei, B. hybridum) have been investigated. We performed a statistical discriminant analysis of twelve quantitative morphological traits on eight herbarium types, corresponding to heterotypic synonyms and newly designated types of each treated name, along with the lectotype and the epitype of B. distachyon, the holotypes of B. stacei and B. hybridum, plus 50 additional representative specimens of the currently recognized taxa. This was complemented by a comprehensive nomenclatural review. The possible taxonomic assignments of types to these names, as well as the nomenclatural priority of Brachypodium distachyon and ten related names: B. hybridum, B. macrostachyum, B. megastachyum, B. stacei, Bromus pentastachyos, Festuca monostachyos, F. rigida, Trachynia platystachya, Triticum schimperi, and T. subtile, have been discussed. Lectotypes are designated for Festuca monostachyos, F. rigida, Triticum schimperi, and T. subtile. Based on our taxonomic and nomenclatural study, the names Festuca monostachyos and Triticum subtile can be considered conspecific and heterotypic synonyms of the Linnaean name Bromus distachyos (≡ Brachypodium distachyon). Furthermore, the names Brachypodium macrostachyum, Brachypodium megastachyum, Bromus pentastachyos, Festuca rigida, and Brachypodium distachyon var. platystachyon (≡ Trachynia platystachya) are conspecific with Brachypodium hybridum, and Triticum schimperi is conspecific with Brachypodium stacei. Since the names B. hybridum and B. stacei are widely used but are later heterotypic synonyms according to results of our study, proposals to conserve these names are necessary. On the other hand, the application of the names Bromus pauper, Brachypodium geniculatum, Festuca pseudistachya, Bromus paradoxus, and Triticum flabellatum is uncertain, and as such, they are treated as nomina ambigua. Finally, Festuca ciliata and Triticum asperum are two illegitimate names, and Triticum brevisetum is recognized as a new synonym of Brachypodium retusum, with a lectotype designated in this paper.2025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://zaguan.unizar.es/record/163748reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/DGA-FSE/A01-23Rinfo:eu-repo/grantAgreement/ES/MICINN/PDC2022- 133712-I00info:eu-repo/grantAgreement/ES/MICINN/PID2022-140074NB-I00info:eu-repo/grantAgreement/EUR/MICINN/TED2021-131073B-I00info:eu-repo/semantics/openAccessoai:zaguan.unizar.es:1637482026-05-29T13:59:51Z
dc.title.none.fl_str_mv On the taxonomy and nomenclature of the annual species of the Brachypodium distachyon grass complex (Gramineae, Pooideae)
title On the taxonomy and nomenclature of the annual species of the Brachypodium distachyon grass complex (Gramineae, Pooideae)
spellingShingle On the taxonomy and nomenclature of the annual species of the Brachypodium distachyon grass complex (Gramineae, Pooideae)
Ferrer Gallego, P. Pablo
title_short On the taxonomy and nomenclature of the annual species of the Brachypodium distachyon grass complex (Gramineae, Pooideae)
title_full On the taxonomy and nomenclature of the annual species of the Brachypodium distachyon grass complex (Gramineae, Pooideae)
title_fullStr On the taxonomy and nomenclature of the annual species of the Brachypodium distachyon grass complex (Gramineae, Pooideae)
title_full_unstemmed On the taxonomy and nomenclature of the annual species of the Brachypodium distachyon grass complex (Gramineae, Pooideae)
title_sort On the taxonomy and nomenclature of the annual species of the Brachypodium distachyon grass complex (Gramineae, Pooideae)
dc.creator.none.fl_str_mv Ferrer Gallego, P. Pablo
Fabado, Javier
Catalán, Pilar
author Ferrer Gallego, P. Pablo
author_facet Ferrer Gallego, P. Pablo
Fabado, Javier
Catalán, Pilar
author_role author
author2 Fabado, Javier
Catalán, Pilar
author2_role author
author
description The taxonomy and nomenclature of the type material potentially linked to the three recognized annual species of the grass genus Brachypodium (B. distachyon, B. stacei, B. hybridum) have been investigated. We performed a statistical discriminant analysis of twelve quantitative morphological traits on eight herbarium types, corresponding to heterotypic synonyms and newly designated types of each treated name, along with the lectotype and the epitype of B. distachyon, the holotypes of B. stacei and B. hybridum, plus 50 additional representative specimens of the currently recognized taxa. This was complemented by a comprehensive nomenclatural review. The possible taxonomic assignments of types to these names, as well as the nomenclatural priority of Brachypodium distachyon and ten related names: B. hybridum, B. macrostachyum, B. megastachyum, B. stacei, Bromus pentastachyos, Festuca monostachyos, F. rigida, Trachynia platystachya, Triticum schimperi, and T. subtile, have been discussed. Lectotypes are designated for Festuca monostachyos, F. rigida, Triticum schimperi, and T. subtile. Based on our taxonomic and nomenclatural study, the names Festuca monostachyos and Triticum subtile can be considered conspecific and heterotypic synonyms of the Linnaean name Bromus distachyos (≡ Brachypodium distachyon). Furthermore, the names Brachypodium macrostachyum, Brachypodium megastachyum, Bromus pentastachyos, Festuca rigida, and Brachypodium distachyon var. platystachyon (≡ Trachynia platystachya) are conspecific with Brachypodium hybridum, and Triticum schimperi is conspecific with Brachypodium stacei. Since the names B. hybridum and B. stacei are widely used but are later heterotypic synonyms according to results of our study, proposals to conserve these names are necessary. On the other hand, the application of the names Bromus pauper, Brachypodium geniculatum, Festuca pseudistachya, Bromus paradoxus, and Triticum flabellatum is uncertain, and as such, they are treated as nomina ambigua. Finally, Festuca ciliata and Triticum asperum are two illegitimate names, and Triticum brevisetum is recognized as a new synonym of Brachypodium retusum, with a lectotype designated in this paper.
publishDate 2025
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dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/163748
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dc.language.none.fl_str_mv Inglés
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instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
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