Gonolobus lozadae, a new species of Apocynaceae from the state of Oaxaca, Mexico

  • Leonardo O. Alvarado-Cárdenas Departamento de Biología Comparada, Laboratorio de Plantas Vasculares, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México https://orcid.org/0000-0002-4938-8339
  • Ericka B. Cortez Departamento de Biología Comparada, Laboratorio de Plantas Vasculares, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México http://orcid.org/0000-0003-0707-163X
  • Christopher O. Cervantes Departamento de Biología Comparada, Laboratorio de Plantas Vasculares, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México https://orcid.org/0000-0003-1419-3854
keywords: endemism, gynostegial corona, morphological diversity, Oaxaca


Background: Gonolobus is a morphologically diverse genus with 38 species in Mexico. During the development of an inventory of the Gonolobinae at the national level, some herbarium specimens of Gonolobus were encountered that couldn’t be assigned to any of the previously described species for Mexico

Questions and/or hypotheses: The color and morphologic pattern of the corolla (form, reticulation, callus on the margin of the lobes), and the structure of gynostegial corona are elements that allow distinguishing from other Gonolobus species. Here, it is proposed as a new species based on these attributes.

Species study: Apocynaceae, Gonolobus lozadae.

Study site and dates: Mexico.

Methods: A bibliographic search was carried out and specimens from 11 herbaria were consulted for Gonolobus species in Mexico. An analysis of the characters that allow differentiating the new taxon from the other species was carried out. Conservation status for the new species was evaluated according to International Union for Conservation of Nature criteria.

Results: From the analysis, Gonolobus lozadae is described as a new species.

Conclusions: Gonolobus lozadae is morphologically similar to G. erianthus, G. grandiflorus, G. incerianus and G. triflorus in its size and color of the flowers, but it differs in the corolla and corona morphology. This discovery highlights Mexico as a center of diversity for the genus, with 39 species, and endemism with 48.7 % of the species restricted to the country.


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<em>Gonolobus lozadae</em>, a new species of Apocynaceae from the state of Oaxaca, Mexico


Alvarado-Cárdenas LO, Lozada-Pérez L, Islas-Hernández CS, Cortez EB, Maya-Mandujano KG, Chávez-Hernández MG. 2020. Apocináceas de ayer y hoy. Conocimiento histórico y reevaluación de la diversidad y distribución de Apocynaceae en México. Botanical Sciences 98: 393-416. DOI: https://doi.org/10.17129/botsci.2525
Harris JG, Woolf M. 1994. Plant identification terminology: an illustrated glossary. Estados Unidos, Utah: Spring Lake Publishing. ISBN-13: 978-0964022164.
Hickey LJ. 1973. Classification of the architecture of dicotyledonous leaves. American Journal of Botany 60: 17-33. DOI: https://doi.org/10.2307/2441319
IBdata. 2020. Base de Datos de las Colecciones Biológicas Nacionales, UNAM (en línea), Instituto de Biología, Universidad Nacional Autónoma de México. México. http://ibdata.ib.unam.mx (accessed May 2020).
IUCN. 2019. The IUCN Red List of Threatened Species. Version 2019-1. Available from: http://www.iucnredlist.org (accessed May, 2020)
Juárez-Jaimes V, Lozada-Pérez L. 2003. Asclepiadaceae. Flora del Valle de Tehuacán-Cuicatlán. 37: 1-57. ISBN: 970-32-1293-X
Juárez-Jaimes V, Stevens WD, Lozada-Pérez L. 2009. Gonolobus spiranthus (Apocynaceae, Asclepiadoideae), una Nueva Especie de la Vertiente del Pacífico Mexicano. Novon 19: 479-481. DOI: https://doi.org/10.3417/2008023
Krings A. 2008. Revision of Gonolobus s.s. (Apocynaceae, Asclepiadoideae) in the West Indies. Journal of the Botanical Research Institute of Texas 2: 95–138.
Krings A, Xiang QY. 2004. The Gonolobus complex (Apocynaceae: Asclepiadoideae) in the southeastern United States. SIDA, Contributions to Botany 21: 103–116.
Krings A, Axelrod FS. 2013. Gonolobus aloiensis (Apocynaceae, Asclepiadoideae), a new species from St. Eustatius. Systematic Botany 38: 1132-1137. DOI: https://doi.org/10.1600/036364413X674904
Krings A, Thomas DT, Xiang Q. 2008. On the generic circumscription of Gonolobus (Apocynaceae, Asclepiadoideae): Evidence from molecules and morphology. Systematic Botany 33: 403-415. DOI: https://doi.org/10.1600/036364408784571527
Kunze H. 1995. Floral morphology of some Gonolobeae (Asclepiadaceae). Botanische Hajrbücher fuur Systematik. Pflanzengeschichte und Pflanzengeographie 117: 211–238.
Liede S, Kunze H. 1993. A descriptive system for corona analysis in Asclepiadaceae and Periplocaceae. Plant Systematics and Evolution 185: 275–284. DOI: https://doi.org/10.1007/BF00937663
Martens M, Galeotti HG. 1844. Enumeratio synoptica plantarum phanerogamicarum ab Henrico Galeotti in regionibus mexicanis collectarum. Bulletin de l'Academie Royale des Sciences et Belles-lettres de Bruxelles 11: 365. 1844.
McDonnell A, Parks M, Fishbein M. 2018. Multilocus Phylogenetics of New World Milkweed Vines (Apocynaceae, Asclepiadoideae, Gonolobinae). Systematic Botany 43: 77–96. https://doi.org/10.1600/036364418X697021
Morillo G. 2015. Aportes al conocimiento de las Gonolobinae Parte III (Apocynaceae, Asclepiadoideae). Pittieria 39: 191-258.
NaturaLista. 2019. https://www.naturalista.mx (accessed April, 2020).
QGIS Development Team.2020. QGIS Geographic Information System. Open Source Geospatial Foundation Project. http://qgis.osgeo.org (accessed May 2020)
Rosatti TJ. 1989. The genera of the suborder Apocynineae (Apocynaceae and Asclepiadaceae) in the southeastern United States. Journal of the Arnold Arboretum 70: 444-514. DOI: https://doi.org/10.5962/bhl.part.19792
Stevens WD. 2001a Asclepiadaceae. In: Stevens, WD, Ulloa C, Pool A, Montiel OM, eds. Flora de Nicaragua, Monographs in Systematic Botany Vol. 85, St. Louis: Missouri Botanical Garden. pp. 234–270. ISBN 10: 0915279959; ISBN 13: 9780915279951
Stevens WD. 2001b. Asclepiadaceae. In: Rzedowski J, Calderón de Rzedowski G, eds. Flora fanerogámica del Valle de México. México, Michoacán: Instituto de Ecología – Comisión Nacional para el Conocimiento y Uso de la Biodiversidad, pp: 564-576. ISBN 970-9000-17-9.
Stevens WD. 2005. Fourteen new species of Gonolobus (Apocynaceae, Asclepiadoideae) from Mexico and Central America. Novon 15: 222-244.
Stevens WD, Montiel OM. 2004. Gonolobus incerianus (Apocynaceae, Asclepiadoideae), Una nueva especie de Mesoamérica. Novon 14: 350-353.
Stevens WD, Morales JF. 2009. Apocynaceae. In: Davidse G, Sousa SM, Knapp M, Chiang F, Barrie FR, eds. Flora Mesoamericana: Cucurbitaceae a Polemoniaceae. México: Universidad Nacional Autónoma de México, Instituto de Biología; Saint Louis: Missouri Botanical Garden; London: The Natural History Museum, pp. 662-768. ISBN 979-607-02-0901-7
Templeton AR. 1989. The meaning of species and speciation: a genetic perspective. In: Otte D, Endler J, eds. Speciation and its Consequences. Estados Unidos, Massachusetts: Sinauer Associates, pp. 3-27. ISBN-13: 978-0878936588.
Thiers B. 2019. Index herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available at: http://sweetgum.nybg.org/ih (Accessed February, 2019)
How to Cite
Alvarado-Cárdenas, L. O., Cortez, E. B., & Cervantes, C. O. (2021). Gonolobus lozadae, a new species of Apocynaceae from the state of Oaxaca, Mexico. Botanical Sciences, 99(2), 447-454. https://doi.org/10.17129/botsci.2783