Results 11 to 20 of about 209 (128)
What is Ceratozamia mexicana (Zamiaceae)? [PDF]
Botanical Sciences, 2016 Explorations in central Veracruz on the Transvolcanic Mexican Belt and regions explored by 19th century botanists we found various populations of Ceratozamia whose taxonomic status is not yet completely clear. Especially two populations of C.
Andrew P. Vovides +4 more
doaj +2 more sources
Lectotipificación de Ceratozamia mixeorum (Zamiaceae)
Revista Mexicana de Biodiversidad, 2011 En 1997 fue descrita Ceratozamia mixeorum de la Sierra Mixe en el estado de Oaxaca, región de la cual esta especie es endémica. Sin embargo, se detectaron algunos errores al momento de designar el holotipo y los isotipos respectivos.
Fernando Nicolalde-Morejón +1 more
doaj +4 more sources
Cronología reproductora de Ceratozamia mexicana (Cycadales)
Botanical Sciences, 2000 En Cemtozamia mexicana Brongn. el desarrollo de la semilla se cumple en 24 meses desde la iniciación de los óvulos en agosto hasta el desarrollo completo del cuerpo del embrión.
María Ydelia Sánchez-Tinoco +2 more
doaj +3 more sources
Revista Mexicana de Biodiversidad, 2011 En 1997 fue descrita Ceratozamia mixeorum de la Sierra Mixe en el estado de Oaxaca, región de la cual esta especie es endémica. Sin embargo, se detectaron algunos errores al momento de designar el holotipo y los isotipos respectivos.
Fernando Nicolalde-Morejón +1 more
doaj +1 more source
Reconciling fossils with phylogenies reveals the origin and macroevolutionary processes explaining the global cycad biodiversity. [PDF]
New Phytol, 2023 Summary The determinants of biodiversity patterns can be understood using macroevolutionary analyses. The integration of fossils into phylogenies offers a deeper understanding of processes underlying biodiversity patterns in deep time. Cycadales are considered a relict of a once more diverse and globally distributed group but are restricted to low ...
Coiro M +4 more
europepmc +2 more sources
Loss of the IR region in conifer plastomes: Changes in the selection pressure and substitution rate of protein-coding genes. [PDF]
Ecol Evol, 2022 There are significant differences in the selection pressure of 12 genes and the evolution rate of 9 genes between conifer and non‐conifer. This difference seems to be not related to the loss of typical IR regions but related to habitat. And the newly obtained short IR region plays a role in stabilizing the genome.
Ping J +5 more
europepmc +2 more sources
Mega-sized pericentromeric blocks of simple telomeric repeats and their variants reveal patterns of chromosome evolution in ancient Cycadales genomes. [PDF]
Plant J, 2022 Significance Statement Telomeric sequences, typically found at chromosome ends, play an essential role in genome integrity. We studied their abundance across land plants and observe large blocks of telomeric repeats at centromere positions, particularly on telocentric chromosomes of cycads.
Vozárová R +7 more
europepmc +2 more sources
Spermatophyta Molecular Clock: Time Drift and Recent Acceleration. [PDF]
Plant Environ InteractExponential increase in the base substitution rate in recent geologic time. ABSTRACT Angiospermae radiation is widely recognized as a mid‐Cretaceous event, but the adaptive radiation of Asarum and Viola as spring ephemerals also occurred during the Quaternary. To better understand the evolution of Angiospermae through geological time, a robust and well‐
Osozawa S.
europepmc +2 more sources
Unraveling Biogeographic Boundaries Within the Sierra Madre Oriental, México: An Endemicity Analysis Using a Taxonomically Diverse Dataset. [PDF]
Ecol EvolWe provide boundaries of the Sierra Madre Oriental in Mexico through a multi‐taxa endemicity analysis. ABSTRACT The Sierra Madre Oriental (SMO) is a significant mountain range and one of Mexico's 14 biogeographical provinces. Its delimitation has been debated.
Goyenechea Mayer-Goyenechea I +5 more
europepmc +2 more sources
Cycad phylogeny predicts host plant use of Eumaeus butterflies. [PDF]
Ecol Evol, 2023 A case of tight evolution between Eumaeus herbivorous butterflies and cycads, pointing to the generality of correlated evolution and phylogenetic tracking in plant–herbivore interactions across seed plants. Abstract Eumaeus butterflies are obligate herbivores of Zamia, the most diverse neotropical genus of cycads.
Sierra-Botero L +6 more
europepmc +2 more sources