A5089171434- Plant and animal studies
- Plant Diversity and Evolution
- Plant Taxonomy and Phylogenetics
- Insect and Arachnid Ecology and Behavior
- Plant Parasitism and Resistance
- Chromosomal and Genetic Variations
- Plant tissue culture and regeneration
- Plant and Fungal Species Descriptions
- Animal and Plant Science Education
- Evolution and Paleontology Studies
- Scarabaeidae Beetle Taxonomy and Biogeography
- Fern and Epiphyte Biology
- Insect-Plant Interactions and Control
- Botanical Research and Chemistry
- Botanical Research and Applications
- Ecology and biodiversity studies
- African Botany and Ecology Studies
- Genetic diversity and population structure
- Ecology and Vegetation Dynamics Studies
- Natural product bioactivities and synthesis
- Plant Pathogens and Fungal Diseases
- Insect and Pesticide Research
- Animal Ecology and Behavior Studies
Universidad Nacional Autónoma de México
2009-2023
Autonomous University of Tlaxcala
2018-2023
Instituto de Ecología
2010-2011
The establishment of modern terrestrial life is indissociable from angiosperm evolution. While available molecular clock estimates age range the Paleozoic to Late Cretaceous, fossil record consistent with diversification in Early Cretaceous. time-frame evolution here estimated using a sample representing 87% families and sequences five plastid nuclear markers, implementing penalized likelihood Bayesian relaxed clocks. A literature-based review palaeontological yielded calibrations for 137...
As angiosperms became one of the megadiverse groups macroscopic eukaryotes, they forged modern ecosystems and promoted evolution extant terrestrial biota. Unequal distribution species among lineages suggests that diversification, process ultimately determines richness, acted differentially through angiosperm evolution.
Mexico is one of the most biodiverse countries in world, with an important proportion endemism mainly because convergence Nearctic and Neotropical biogeographic regions, which generate great diversity species turnover at different spatial scales. However, our knowledge Mexican ant biota limited to a few well-studied taxa, we lack comprehensive synthesis biodiversity information. For instance, available literature on fauna refers only lists by states, or focused regions country, prevents...
The complete sequence of floral development in three species Acacia was analysed. These were sampled from each the subgenera. berlandieri Benth. (subg. Aculeiferum), A. pennatula (Schltdl. & Cham.) Acacia) and saligna (Labill.) H.L.Wendl. Phyllodineae). aim study to determine whether different subgenera share developmental pathways during flower formation. This showed that genus is heterogeneous. Each studied inception patterns calyx androecium, whereas corolla gynoecium similar....
Se utilizó la técnica de splash para analizar las características citogenéticas Tamarindus indica en meristemos radiculares semillas provenientes individuos silvestres y variedades cultivadas México. El número cromosómico observado metafases mitóticas 2n = 2x 24 concuerda con recuentos anteriores, aunque difiere otros obtenidos algunas zonas paleotropicales, por lo que se discute el papel disploidía evolución del género. La fórmula cariotípica establecida aquí como 16m + 6sm 2stsat los...
Antecedentes: Acaciella (Mill.) Britton & Rose es un género neotropical, cuyas especies se encontraban dentro del subgénero Aculeiferum (tribu Acacieae) debido a similitudes morfológicas. Estudios moleculares reflejan relaciones filogenéticas cercanas con el Calliandra Ingeae). Actualmente carece de estudios desarrollo floral para , lo cual podría proveer evidencias morfológicas relacionadas la historia evolutiva ambas tribus. Preguntas: ¿Los patrones angustissima serán similares...
Summary As angiosperms became one of the megadiverse groups macroscopic eukaryotes, they forged modern ecosystems and promoted evolution extant terrestrial biota. Unequal distribution species among lineages suggests that diversification, process which ultimately determines species-richness, acted differentially through angiosperm evolution. We investigate how by identifying phylogenetic temporal placement exceptional radiations, combining most densely fossil-calibrated molecular clock...
The karyotypes and NOR condition of the secondary constrictions chromosome pair 1 in two populations Crotalaria incana from Atlantic Pacific slopes Mexico are described. Both exhibited same number 2n=14 which shared a constriction on short arm 1. Differences were found position centromere 5 size proximal region In addition, marked differences observed total haploid length (THC) mean (MC), without this affecting asymmetry indexes. population fragments fragile sites at prometaphase. These data...
Se realizo un estudio citogenetico en celulas provenientes de meristemos radiculares cinco individuos Pithecellobium dulce (Leguminosae) Canon Lobos, Morelos, Mexico (18°51´20´´N, 99°06´W, 1105 m s.m.) utilizando metodo extendido y secado al aire. Sobre analisis 456 se confirmo numero cromosomico diploide 2n= 26 con baja frecuencia tetraploides (4,38%). obtuvo ademas, por primera vez, la formula cariotipica para una poblacion esta especie (14m+10sm+2st), longitud cromosomica total (42,13...
A team of 79 scientists from more than 50 institutions partnered to gather all available information regarding Mexican ants since 1894, the year in which first geographical record an ant is known for country. In this new study, including 21,000 records, we showed that there are ~900 species Mexico, distributed unevenly across Mexico one relatively few countries along interface tropical and temperate zones, a megadiverse These photographs illustrate article “Mexico ants: incidence abundance...
The richness of spider species on the foliage Mexican ant-acacias in Los Tuxtlas (Veracruz), and Santiago Pinotepa Nacional (Oaxaca) was documented. A total 11 species, grouped into five families were found; representing two identified, whereas Nacional, number taxa eight, belonging to families. spiders higher than that found Tuxtlas. In both locations Nephila clavipes Linnaeus Eustala illicita O. Pickard-Cambridge, from Araneidae, these had been previously reported as common inhabitants...
Background: The Neotropical ant-acacias show morphological variations in their vegetative characteristics as a consequence of relationship with ants. However, there is no information regarding whether floral organs have also undergone any modification that prevents resident ants from approaching the inflorescences anthesis.
 Questions: Are patterns development affected by ants? Is organ or structure involved avoiding presence during flowering period? At what stage do these modifications...
Background: Celastraceae is a morphologically heterogeneous family. For this reason, the inclusion of some taxa within group controversial. Recently problem has become significant since its fossil record recognized as an important source information for evolutionary studies, especially those using molecular clocks which require robust, reliable record. Questions: What are most records Celastraceae? morphological characters used to assign fossils in family? Study site and dates: Compilation...
Se presenta una nueva localidad con el registro de la langosta fósil Atherfieldastacus magnus en los alrededores San Martín Atexcal, dentro Formación Juan Raya estado Puebla. Dicho amplía distribución espacial especie región. Adicionalmente, se reporta probable asociación simbiótica entre este crustáceo bivalvos, misma que ha sido confirmada para depósitos sedimentarios del Reino Unido.
Climatic conditions affect the richness of ants resulting in number variation throughout year. The present Neotropical system Acacia-Pseudomyrmex have been previously studied considering only one sampling season. In contrast, this study we analyze two ant-acacia systems during rainy and dry seasons. was carried out on a plot located state Oaxaca, Mexico where 14 ant species, 3 mutualistic 11 non-mutualistic were found, which 2 represent new records for state. Ant species differed between...