Zamia multidentata (Cycadales, Zamiaceae), a new arborescent species of Zamia from Acre, Brazil

SEGALLA, ROSANE; PIMENTA, RICARDO SOARES; CALONJE, MICHAEL

doi:10.11646/phytotaxa.598.1.2

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…During the last decade, several new species of Zamia have been discovered (Segalla and Calonje, 2019;Segalla et al, 2023). However, the morphological and phenological patterns of the widely distributed species in Zamia has received limited attention.…”

Section: Discussionmentioning

confidence: 99%

Reestablishment of Zamia lawsoniana (Zamiaceae, Cycadales), an endemic species of Mexico, with first description of the ovulate strobilus

Nicolalde-Morejón,

Martínez-Domínguez,

González-Aguilar

et al. 2024

Acta Bot. Mex.

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Background and Aims: Zamia, with 86 species, is the most diverse Neotropical cycad genus. In Mexico, 18 species occur, of which 15 are endemics. These taxa are distributed from sea level to 1200 m a.s.l. Recently, the phenology of Zamia in wild populations from southern Veracruz and Tabasco was studied to evaluate the morphological patterns of reproductive structures. While these records have been considered as Z. loddigesii, a species with a wide distribution along the Gulf of Mexico, different populations do possess morphological differences. Based on these data, we reevaluated the synonymy of Z. lawsoniana, which was described in 1884 and synonymized with Z. loddigesii in 1995. Methods: Botanical material was collected from three populations in Tabasco, ten in Veracruz and two in Oaxaca previously considered part of Z. loddigesii. Reproductive structures were measured at maturity in habitat. Populations were visited during 2022 and 2023 to record reproductive phenology. Herbarium specimens of Zamia lawsoniana and morphologically similar species (Z. loddigesii, Z. spartea and Z. stenophyllidia) were examined. A morphological description and an illustration for Z. lawsoniana were prepared. In addition, an identification key that included related species in terms of morphology, geography and phylogenetics was made. Key results: Zamia lawsoniana is removed from synonymy and some taxonomic clarifications are made. In this context, we provide a complete description of pollen strobili, including the microsporophylls, range of vegetative morphological variation, and a botanical illustration. Additionally, the ovulate strobilus is described for the first time and a preliminary conservation status is proposed. Conclusions: Based on morphological evidence of reproductive structures and vegetative characters, we propose the reestablishment of Zamia lawsoniana and its removal from synonymy with Z. loddigesii.

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Section: Discussionmentioning

confidence: 99%

Reestablishment of Zamia lawsoniana (Zamiaceae, Cycadales), an endemic species of Mexico, with first description of the ovulate strobilus

Nicolalde-Morejón,

Martínez-Domínguez,

González-Aguilar

et al. 2024

Acta Bot. Mex.

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A Review of Taxonomic Concepts and Species Delimitation in Cycadales

Martínez-Domínguez,

Nicolalde-Morejón,

Vergara-Silva

et al. 2023

Bot. Rev.

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Taxonomic data is essential to advance the discovery and description of biodiversity, as well as the study of evolutionary processes. Emerging large-scale datasets and new methods of analysis have provided different approaches to describe biodiversity. Here, we present a review of the taxonomic history in Cycadales including an analysis of historical taxonomic concepts and approaches used for species delimitation. We examine the trends in the publication of new species following taxonomic works in books, journals and horticultural catalogues, monographic projects and floras where species treatments were published. In addition, we review the studies concerning species delimitations using the literature available in scientific journals appearing in the database ISI Web of Knowledge. The approaches used were discussed throughout all research focused on empirical and theoretical considerations in each study. We review the current state of the studies on causal processes that have given rise to the currently recognized diversity. The trend shows that taxonomic work on discovery and description of species has been intensive in the last 40 years culminating in 38.8% of binomials published. As a result, we consider the relevance of the monographs and floras for identification of species for other biological disciplines and the content of these contributions is compared and discussed. A total of six criteria (diagnosability, phenetic, phylogenetic, genotypic cluster, niche specialization and coalescent) were detected from the following three approaches to species delimitation within Cycadales: traditional, integrative taxonomy, and monophyletic. In all cases, the results from these species delimitations not only provided a taxonomic treatment or proposed a new species, but also supposedly clarified the other species involved as a result of the new taxonomic concept of the new species described. Most investigations of species delimitation used the traditional approach or a phenetic criteria. Finally, we discuss evolutionary studies on causal processes involved in cycad diversity. This is considered in the context of species delimitation as hypothesis testing for a successful evaluation of variation in both genetic and morphological understanding.

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Zamia multidentata (Cycadales, Zamiaceae), a new arborescent species of Zamia from Acre, Brazil

Cited by 2 publications

References 13 publications

Reestablishment of Zamia lawsoniana (Zamiaceae, Cycadales), an endemic species of Mexico, with first description of the ovulate strobilus

Reestablishment of Zamia lawsoniana (Zamiaceae, Cycadales), an endemic species of Mexico, with first description of the ovulate strobilus

A Review of Taxonomic Concepts and Species Delimitation in Cycadales

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