Naming the long-known: a new species of Desmopsis (Annonaceae) endemic to Mexico
Background and Aims: A frequently collected species of Desmopsis (Annonaceae) in Mexico has remained indeterminate for more than 30 years. Its floral characteristics are similar to those present in the Asian genus Guamia (now Meiogyne), and for many years it has been named “Guamia mexicana”, but not...
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| Format: | Online |
| Langue: | eng spa |
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Instituto de Ecología, A.C.
2022
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| Accès en ligne: | https://abm.ojs.inecol.mx/index.php/abm/article/view/2110 |
| _version_ | 1799771421817176064 |
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| author | Ortiz-Rodriguez, Andrés Ernesto |
| author_facet | Ortiz-Rodriguez, Andrés Ernesto |
| author_sort | Ortiz-Rodriguez, Andrés Ernesto |
| collection | ABM |
| description | Background and Aims: A frequently collected species of Desmopsis (Annonaceae) in Mexico has remained indeterminate for more than 30 years. Its floral characteristics are similar to those present in the Asian genus Guamia (now Meiogyne), and for many years it has been named “Guamia mexicana”, but not formally described. Recently, it was shown that “Guamia mexicana” is phylogenetically related to Desmopsis and Stenanona and not to Guamia. However, and despite being frequently collected, its taxonomic status has not been clarified. Here, the phylogenetic relationships and the morphological and ecological characteristics that distinguish “Guamia mexicana” from other species were studied. As a result, this new species is herein described.
Methods: The new species was recognized using the unique combination of features through comparisons with morphologically similar species and a literature review. Its pollen characteristics were analysed using scanning electron microscopy. Its phylogenetic relationships were determined based on previously published phylogenies. Lastly, its conservation status was tentatively assessed by calculating extent of occurrence (EOO) and area of occupancy (AOO) using the GeoCAT tool and applying the IUCN Red List categories and criteria.
Key results: A new species of Annonaceae endemic to Mexico, namely Desmopsis ibarrarum, is described and illustrated. It is distinguished from other Desmopsis species by the combination of long and cylindrical fruits with many seeds, with a hard and woody testa and densely covered by very small sericeous hairs (velvety), glabrous leaves with percurrent tertiary venation, the absence of leafy bracts on the pedicels, the morphological differentiation of internal and external petals, and the partial fusion of the sepals.
Conclusions: Desmopsis ibarrarum is only closely related to Desmopsis dubia and both species are here considered members of a particular lineage within the Desmopsis-Stenanona clade, the “Desmopsis dubia group”. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-2110 |
| institution | Acta Botanica Mexicana |
| language | eng spa |
| publishDate | 2022 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-21102023-01-12T07:02:28Z Naming the long-known: a new species of Desmopsis (Annonaceae) endemic to Mexico Nombrando lo conocido: una nueva especie de Desmopsis (Annonaceae) endémica de México Ortiz-Rodriguez, Andrés Ernesto bosque kárstico Chiapas granos de polen Lista Roja de la UICN región neotropical tribu Miliuseae. Chiapas IUCN Red List karst forests Neotropical region pollen grains tribe Miliuseae. Background and Aims: A frequently collected species of Desmopsis (Annonaceae) in Mexico has remained indeterminate for more than 30 years. Its floral characteristics are similar to those present in the Asian genus Guamia (now Meiogyne), and for many years it has been named “Guamia mexicana”, but not formally described. Recently, it was shown that “Guamia mexicana” is phylogenetically related to Desmopsis and Stenanona and not to Guamia. However, and despite being frequently collected, its taxonomic status has not been clarified. Here, the phylogenetic relationships and the morphological and ecological characteristics that distinguish “Guamia mexicana” from other species were studied. As a result, this new species is herein described. Methods: The new species was recognized using the unique combination of features through comparisons with morphologically similar species and a literature review. Its pollen characteristics were analysed using scanning electron microscopy. Its phylogenetic relationships were determined based on previously published phylogenies. Lastly, its conservation status was tentatively assessed by calculating extent of occurrence (EOO) and area of occupancy (AOO) using the GeoCAT tool and applying the IUCN Red List categories and criteria. Key results: A new species of Annonaceae endemic to Mexico, namely Desmopsis ibarrarum, is described and illustrated. It is distinguished from other Desmopsis species by the combination of long and cylindrical fruits with many seeds, with a hard and woody testa and densely covered by very small sericeous hairs (velvety), glabrous leaves with percurrent tertiary venation, the absence of leafy bracts on the pedicels, the morphological differentiation of internal and external petals, and the partial fusion of the sepals. Conclusions: Desmopsis ibarrarum is only closely related to Desmopsis dubia and both species are here considered members of a particular lineage within the Desmopsis-Stenanona clade, the “Desmopsis dubia group”. Antecedentes y Objetivos: Una especie de Desmopsis (Annonaceae) colectada frecuentemente en México ha permanecido indeterminada durante más de 30 años. Sus características florales son similares a las del género asiático Guamia (actualmente Meiogyne), y desde hace muchos años se le ha nombrado como “Guamia mexicana”, pero no ha sido descrita formalmente. Recientemente se demostró que “Guamia mexicana” está filogenéticamente emparentada con Desmopsis y Stenanona y no con Guamia. Sin embargo, y a pesar de ser colectada con frecuencia, no se ha aclarado su estatus taxonómico. En este artículo se estudiaron las relaciones filogenéticas y las características morfológicas y ecológicas que distinguen a “Guamia mexicana” de otras especies. Como resultado, esta especie nueva es aquí descrita. Métodos: El reconocimiento de la especie nueva se basó en la correlación de varios caracteres morfológicos, a través de comparaciones con especies morfológicamente similares y de la revisión de literatura. Las características de su polen se analizaron mediante microscopía electrónica de barrido. Sus relaciones filogenéticas se determinaron con base en filogenias publicadas previamente. Finalmente, a partir de sus localidades conocidas se calculó extensión de ocurrencia (EOO) y área de ocupación (AOO) en GeoCAT, y aplicando las categorías y criterios de la Lista Roja de la UICN se determinó su estado de conservación. Resultados clave: Desmopsis ibarrarum, una nueva especie de Annonaceae endémica de México, es descrita e ilustrada. Se distingue de otras especies de Desmopsis por la combinación de frutos largos y cilíndricos con muchas semillas, con una testa dura y leñosa y densamente cubierta por pelos seríceos muy pequeños (aterciopelados), por sus hojas glabras con venación terciaria percurrente, la ausencia de brácteas foliosas en los pedicelos, la diferenciación morfológica de los pétalos internos y externos, y por la fusión parcial de los sépalos. Conclusiones: Desmopsis ibarrarum esta únicamente relacionada a Desmopsis dubia y las dos especies se consideran aquí miembros de un linaje particular dentro del clado Desmopsis-Stenanona, el "grupo Desmopsis dubia". Instituto de Ecología, A.C. 2022-10-25 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf text/xml application/epub+zip https://abm.ojs.inecol.mx/index.php/abm/article/view/2110 10.21829/abm129.2022.2110 Acta Botanica Mexicana; No. 129 (2022) Acta Botanica Mexicana; Núm. 129 (2022) 2448-7589 0187-7151 eng spa https://abm.ojs.inecol.mx/index.php/abm/article/view/2110/4285 https://abm.ojs.inecol.mx/index.php/abm/article/view/2110/4350 https://abm.ojs.inecol.mx/index.php/abm/article/view/2110/4286 https://creativecommons.org/licenses/by-nc/4.0 |
| spellingShingle | Ortiz-Rodriguez, Andrés Ernesto Naming the long-known: a new species of Desmopsis (Annonaceae) endemic to Mexico |
| title | Naming the long-known: a new species of Desmopsis (Annonaceae) endemic to Mexico |
| title_full | Naming the long-known: a new species of Desmopsis (Annonaceae) endemic to Mexico |
| title_fullStr | Naming the long-known: a new species of Desmopsis (Annonaceae) endemic to Mexico |
| title_full_unstemmed | Naming the long-known: a new species of Desmopsis (Annonaceae) endemic to Mexico |
| title_short | Naming the long-known: a new species of Desmopsis (Annonaceae) endemic to Mexico |
| title_sort | naming the long-known: a new species of desmopsis (annonaceae) endemic to mexico |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/2110 |
| work_keys_str_mv | AT ortizrodriguezandresernesto namingthelongknownanewspeciesofdesmopsisannonaceaeendemictomexico AT ortizrodriguezandresernesto nombrandoloconocidounanuevaespeciededesmopsisannonaceaeendemicademexico |
