Daniel Sánchez

CONACYT - University of Guadalajara · Laboratorio Nacional de Identificación y Caracterización Vegetal

Stenocactus × irregularis, a new hybrid from the Bajío region of Mexico, is described and illustrated. The hybrid is proposed based on morphometric analyses of the hybrid and parental taxa. The number of ribs and the presence of incomplete ribs distinguish the new nothospecies from the parental species. In addition, we provide an updated identifica...

We describe a new endemic densely spined Mammillaria from San Luis Potosí, Mexico. The new species, named M. morentiniana, is distinctive by the presence of a globose to shortly cylindric stem with several glabrous, reddish central spines, radial spines that protrude from the plant like white needle-bristles, and small flowers with pale yellow, lan...

Background: The Mammillaria series Stylothelae (Cactaceae) includes 16 taxa distributed mostly among the limits of the Chihuahuan Desert (CD) with the Sierra Madre Oriental and the Transmexican Volcanic Belt (TVB). In Jalisco, four pink flowered species occur at the southwestern end of the CD where it meets the TVB. The boundaries and recognition o...

Biotic pollination is typically a mutualism between plants and their pollina-tors, where each partner receives a benefit. However, plants can resort to various reproductive strategies to attract pollinators. Within angiosperms, a group of plants known as endoparasites is comprised of only flowers or inflores-cences. These plants exhibit various rep...

The spatial distribution of the species richness is not aleatory. It responds to evolutionary, geographical, and climatic events, and it is important to establish biodiversity management and conservation priorities. The mountainous zones around the globe have been identified as centers of plant diversification. In Mexico, the Mexican Transition Zon...

The genus Coryphantha includes plants with globose to cylindrical stems bearing furrowed tubercles, flowers arising at the apex, and seeds with flattened testa cells. Coryphantha is the second richest genus in the tribe Cacteae. Nevertheless, the genus lacks a phylogenetic framework. The limits of Coryphantha with its sister genus Escobaria and the...

Background: Aporocactus is an epiphytic or saxicolous genus that is endemic to Mexico and has a distribution restricted to cloud forests and pine-oak forests. As with many cacti, Aporocactus presents taxonomic conflicts, especially regarding species delimitation, since five species in this genus have been described and accepted by some authors, whi...

The genus Peniocereus contains distinctive cacti with slender stems and thickened roots. The phylogenetic relationship of Peniocereus to other members of the subtribe Pachycereinae is unresolved, and a sister group for the genus has not been suggested in previous molecular phylogenies. Therefore, this study aims to corroborate the monophyly of Peni...

A new species of Acanthocereus, endemic from southern Jalisco, is described and illustrated. Acanthocereus atropurpureus distinguishes by the diameter of mature stems, presence of low ribs with sinuate margins, dull green stem epidermis turning purple during dry season, and the occurrence of four small central spines. We discuss the morphological d...

This data paper presents a largely phylogeny-based online taxonomic backbone for the Cactaceae compiled from literature and online sources using the tools of the EDIT Platform for Cybertaxonomy. The data will form a contribution of the Caryophyllales Network for the World Flora Online and serve as the base for further integration of research result...

Acanthocereus paradoxus sp. nov., an endemic narrow cylindrical cactus from the state of Jalisco is described and illustrated. The species can be distinguished by its narrow cylindrical mature stems, stem epidermis dull green with some dark green margins, the presence of four central spines, and a greater number of ribs and spines in young stems. A...

Species delimitation in Cactaceae is a challenging task due to the proliferation of species and subspecies names. Echinocereus pulchellus occurs across a wide geographical range in Mexico and presents numerous polymorphisms. The species complex has been considered to comprise five subspecies. In the present work, we analyze morphological variation...

Species delimitation in Cactaceae is a challenging task due to the proliferation of species and subspecies names. Echinocereus pulchellus occurs across a wide geographical range in Mexico and presents numerous polymorphisms. The species complex has been considered to comprise five subspecies. In the present work, we analyze morphological variation...

Phylogenies based on molecular characters has dominated publications rather than those based on morphological characters. Some authors have defended the use of morphology in phylogenetic reconstruction. In Cactaceae few studies have been made combining molecular and morphological characters. A good example about the use of morphology in phylogeneti...

Generic circumscription and species relationships in several lineages in Cactaceae tribe Cacteae remain unresolved. Turbinicarpus s.l. is one of the most species-rich genera in Cacteae, with its centre of distribution in the Chihuahuan Desert, Mexico. We reconstructed a phylogenetic tree of Turbinicarpus s.l. with Bayesian inference, using plastid...

Generic circumscription and species relationships in several lineages in Cactaceae tribe Cacteae remain unresolved. Turbinicarpus s.l. is one of the most species-rich genera in Cacteae, with its centre of distribution in the Chihuahuan Desert, Mexico. We reconstructed a phylogenetic tree of Turbinicarpus s.l. with Bayesian inference, using plastid...

Premise of research. Dioecy has evolved numerous times among unrelated Cactaceae taxa. Changes in ontogenetic patterns determine final floral morphology and breeding system. It has not been established whether these changes share a common pattern in the cactus family, which would allow inferences to be made in the evolutionary process that underlie...

Echinocereus is a morphologically diverse genus that includes 64 species grouped into eight taxonomic sections based on morphological traits. In previous molecular phylogenetic analyses, the relationships amongst Echinocereus species were not entirely revealed and useful characters to recognize clades were not provided. The inclusion of several sou...

Background and aims: In Cactaceae, the areole is the organ that forms the leaves, spines and buds. Apparently, the genus Echinocereus develops enclosed buds that break through the epidermis of the stem adjacent to the areole; this trait most likely represents a synapomorphy of Echinocereus. The development of the areole is investigated here in ord...

Abstract— Echinocereus is the third most species-rich genus in the Cactaceae. It is distributed in North America from Mexico to the central U. S. A. Previous molecular phylogenetic studies have indicated that the genus is polyphyletic, but incomplete taxon sampling and unclear resolution have hindered the formal re-evaluation of generic and infrag...

Echinocereus sección Triglochidiati ha sido aceptada en los más recientes tratamientos taxonómicos del género, sin embargo el número de especies que incluye ha variado entre una y 14. El presente trabajo tiene como objetivo delimitar el número de especies de la sección Triglochidiati para México a través de análisis multivariados, así como identifi...