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
Ceratozamia aurantiaca (Zamiaceae): A New Cycad Species from the Northern Rainforests of Oaxaca, Mexico [PDF]
Taxonomy, 2021 Ceratozamia aurantiaca, a new cycad species from Oaxaca, Mexico, is described. The new species is endemic to lowland karst tropical rainforests of the northern mountains (Sierra Norte region). This species is related to C. subroseophylla and C.
Miguel Angel Pérez-Farrera +6 more
doaj +3 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
Eobowenia gen. nov. from the Early Cretaceous of Patagonia: indication for an early divergence of Bowenia? [PDF]
BMC Evol Biol, 2017 Background: Even if they are considered the quintessential "living fossils", the fossil record of the extant genera of the Cycadales is quite poor, and only extends as far back as the Cenozoic.
Coiro M, Pott C.
europepmc +4 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
A modification to the SCAR (Sequence Characterized Amplified Region) method provides phylogenetic insights within Ceratozamia (Zamiaceae) [PDF]
Revista Mexicana de Biodiversidad, 2015 Phylogenetic relationships among closely related plant species is still problematic. DNA intergenic regions often are insufficiently variable to provide desired resolution or support.
Dolores Gonzalez Hernandez
doaj +3 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