A new species of Cochemiea (Cactaceae, Cacteae) from Sinaloa, Mexico
Background and Aims: Cochemiea is a genus which currently comprises five species occurring in Mexico. It is morphologically characterized by cylindrical decumbent to prostrate stems and by a long red-scarlet zygomorphic perianth, presumably specialized for hummingbird pollination. As part of the ong...
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Formaat: | Online |
Taal: | eng |
Gepubliceerd in: |
Instituto de Ecología, A.C.
2020
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Online toegang: | https://abm.ojs.inecol.mx/index.php/abm/article/view/1626 |
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author | García Morales, Leccinum Jesús González González, Rodrigo Homero García Jiménez, Jesús Iamonico, Duilio |
author_facet | García Morales, Leccinum Jesús González González, Rodrigo Homero García Jiménez, Jesús Iamonico, Duilio |
author_sort | García Morales, Leccinum Jesús |
collection | ABM |
description | Background and Aims: Cochemiea is a genus which currently comprises five species occurring in Mexico. It is morphologically characterized by cylindrical decumbent to prostrate stems and by a long red-scarlet zygomorphic perianth, presumably specialized for hummingbird pollination. As part of the ongoing taxonomic studies on the North Mexican flora, a population discovered by Thomas Linzen in 2012 in central Sinaloa (Mexico), previously identified as Mammillaria sp., actually refers to a Cochemiea species and cannot be ascribed to any of the known species of that genus. As a consequence, we here propose to describe this population as a a new species for science.
Methods: The work is based on field surveys (autumn 2018 and spring 2019) in central Sinaloa, examination of herbarium specimens, and analysis of relevant literature. Its conservation status was assessed following the guidelines of the IUCN; AOO and EOO were calculated with the program GeoCAT.
Key results: Cochemiea thomasii is described and illustrated from Sinaloa. The new species is morphologically similar to C. halei from which it differs by the hanging stems, the larger conical tubercles, less numerous and shorter central spines, and the ovoid fruits. A diagnostic key of the known Cochemiea species is included.
Conclusions: Cochemiea thomasii is endemic to the state of Sinaloa where it occupies a small area. On the basis of the criteria B2a (geographic range) and C (small population) of IUCN, the new species can be assessed as Critically Endangered (CR) or Vulnerable (VU). Adopting the precautionary approach, Cochemiea thomasii is considered as Critically Endangered (CR). |
format | Online |
id | oai:oai.abm.ojs.inecol.mx:article-1626 |
institution | Acta Botanica Mexicana |
language | eng |
publishDate | 2020 |
publisher | Instituto de Ecología, A.C. |
record_format | ojs |
spelling | oai:oai.abm.ojs.inecol.mx:article-16262022-11-17T21:46:12Z A new species of Cochemiea (Cactaceae, Cacteae) from Sinaloa, Mexico Una nueva especie de Cochemiea (Cactaceae, Cacteae) de Sinaloa, México García Morales, Leccinum Jesús González González, Rodrigo Homero García Jiménez, Jesús Iamonico, Duilio Cochemiea halei Cochemiea thomasii endemic Sierra Madre Occidental Cochemiea halei Cochemiea thomasii endemic Sierra Madre Occidental. Background and Aims: Cochemiea is a genus which currently comprises five species occurring in Mexico. It is morphologically characterized by cylindrical decumbent to prostrate stems and by a long red-scarlet zygomorphic perianth, presumably specialized for hummingbird pollination. As part of the ongoing taxonomic studies on the North Mexican flora, a population discovered by Thomas Linzen in 2012 in central Sinaloa (Mexico), previously identified as Mammillaria sp., actually refers to a Cochemiea species and cannot be ascribed to any of the known species of that genus. As a consequence, we here propose to describe this population as a a new species for science. Methods: The work is based on field surveys (autumn 2018 and spring 2019) in central Sinaloa, examination of herbarium specimens, and analysis of relevant literature. Its conservation status was assessed following the guidelines of the IUCN; AOO and EOO were calculated with the program GeoCAT. Key results: Cochemiea thomasii is described and illustrated from Sinaloa. The new species is morphologically similar to C. halei from which it differs by the hanging stems, the larger conical tubercles, less numerous and shorter central spines, and the ovoid fruits. A diagnostic key of the known Cochemiea species is included. Conclusions: Cochemiea thomasii is endemic to the state of Sinaloa where it occupies a small area. On the basis of the criteria B2a (geographic range) and C (small population) of IUCN, the new species can be assessed as Critically Endangered (CR) or Vulnerable (VU). Adopting the precautionary approach, Cochemiea thomasii is considered as Critically Endangered (CR). Antecedentes y Objetivos: Cochemiea es un género que actualmente comprende cinco especies que se encuentran en México, y se caracteriza morfológicamente por sus tallos decumbentes cilíndricos o postrados y por su largo perianto zigomorfo rojo escarlata presumiblemente especializado para la polinización por colibríes. Como parte de los estudios taxonómicos en curso sobre la flora del norte de México proponemos como nueva especie una población descubierta por Thomas Linzen en 2012 en el centro de Sinaloa (México), previamente identificada como Mammillaria sp., se trata de una especie de Cochemiea que no concuerda con ninguna especie conocida del género, la cual proponemos como nueva especie para la ciencia. Métodos: Este trabajo se basa en estudios de campo (otoño 2018 y primavera 2019) en el centro de Sinaloa, la revisión de ejemplares de herbario y de literatura relevante. Se evaluó su estatus de conservación siguiendo los lineamientos propuestos por la IUCN; AOO y EOO fueron calculados usando el programa GeoCAT. Resultados clave: Cochemiea thomasii es descrita e ilustrada de Sinaloa. Esta nueva especie es morfológicamente similar a C. halei, de la cual difiere por sus tallos colgantes, los tubérculos cónicos más grandes, las espinas radiales menos numerosas y más cortas, y los frutos ovoides. Se incluye una clave diagnóstica de las especies conocidas de Cochemiea. Conclusiones: Cochemiea thomasii es endémica del estado de Sinaloa donde vive en un área reducida. Con base en los criterios B2a (distribución geográfica) y C (población pequeña) de la IUCN, esta especie se evalúa como En Peligro Crítico (CR) o Vulnerable (VU). Adoptando el principio de precaución, Cochemiea thomasii es considerada en Peligro Crítico (CR). Instituto de Ecología, A.C. 2020-02-18 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/epub+zip application/pdf application/xml https://abm.ojs.inecol.mx/index.php/abm/article/view/1626 10.21829/abm127.2020.1626 Acta Botanica Mexicana; No. 127 (2020) Acta Botanica Mexicana; Núm. 127 (2020) 2448-7589 0187-7151 eng https://abm.ojs.inecol.mx/index.php/abm/article/view/1626/4147 https://abm.ojs.inecol.mx/index.php/abm/article/view/1626/4148 https://abm.ojs.inecol.mx/index.php/abm/article/view/1626/2000 Derechos de autor 2020 Acta Botanica Mexicana https://creativecommons.org/licenses/by-nc/4.0 |
spellingShingle | García Morales, Leccinum Jesús González González, Rodrigo Homero García Jiménez, Jesús Iamonico, Duilio A new species of Cochemiea (Cactaceae, Cacteae) from Sinaloa, Mexico |
title | A new species of Cochemiea (Cactaceae, Cacteae) from Sinaloa, Mexico |
title_full | A new species of Cochemiea (Cactaceae, Cacteae) from Sinaloa, Mexico |
title_fullStr | A new species of Cochemiea (Cactaceae, Cacteae) from Sinaloa, Mexico |
title_full_unstemmed | A new species of Cochemiea (Cactaceae, Cacteae) from Sinaloa, Mexico |
title_short | A new species of Cochemiea (Cactaceae, Cacteae) from Sinaloa, Mexico |
title_sort | new species of cochemiea (cactaceae, cacteae) from sinaloa, mexico |
url | https://abm.ojs.inecol.mx/index.php/abm/article/view/1626 |
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