Ceratozamia dominguezii (Zamiaceae): A New Cycad Species from Southeastern Mexico

Taxonomy

Pedro Díaz-Jiménez¹  José Said Gutiérrez-Ortega²  Miguel Angel Pérez-Farrera³  Michael Calonje⁴  Andrew P. Vovides⁵ 

[1] Centro de Investigaciones Tropicales, Universidad Veracruzana, Xalapa 91000, Mexico;Institute for Excellence in Educational Innovation, Chiba University, Chiba 263-8522, Japan;Laboratorio de Ecología Evolutiva, Herbario Eizi Matuda, Instituto de Ciencias Biológicas, Universidad de Ciencias y Artes de Chiapas, Tuxtla Gutiérrez 29039, Mexico;Montgomery Botanical Center, Coral Gables, FL 33156, USA;Red de Biología Evolutiva, Instituto de Ecología, A.C., Xalapa 91073, Mexico;

关键词: cycads;    endangered species;    floristic refugia;    Mesoamerica;    morphological analyses;    species complex;   

DOI  :  10.3390/taxonomy1040026

来源: DOAJ

【 摘 要 】

Ceratozamia dominguezii (Zamiaceae), a new species endemic to the lowland karstic tropical rainforests of southeastern Veracruz, Mexico, is described. The new species is part of the C. robusta species complex, a group of closely related species that share unique characteristics in the genus, such as robust trunks, large strobili, and long leaves. Compared with the other species in the complex (i.e., C. robusta, C. leptoceras, C. aurantiaca and C. subroseophylla), C. dominguezii has the longest rachides, and is characterized by having papyraceous leaflets, a unique caramel color in emerging leaves, and a dark-violet color in the central portion of distal faces of male and female sporophylls. Ceratozamia dominguezii occurs within the Uxpanapa floristic refuge, which is hypothesized to have sheltered a numerous group of tropical elements during the Neogene glaciations. The recognition of C. dominguezii contributes to clarifying the present diversity of cycads in the genus Ceratozamia, and adds discussion on the role of floristic refugia in the divergence of Neotropical plants in Mexico.

【 授权许可】

Unknown