A new evolutionary lineage of diving birds from the Late Cretaceous of North America and AsiaMesozoic birdsHesperornithiformAsiaNorth AmericaFreshwater hesperornithiformsBrodavidae n. famA new family, Brodavidae, with one new genus and four species, is described from the Late Cretaceous (...
lineage and “B” hemilineage, respectively. Individual hemilineages form characteristic tracts (Fig.1c, e), surrounded by glia, as the constituent neurons enter, traverse, and interconnect the neuropil volume (Dumstrei et al.2003; Spindler and Hartenstein2011; Lee et al.2020). Many lineages l...
two and three species, respectively. Considering the evolutionary force of chromosomal rearrangements regarding speciation and diversification of species, we set out to investigate if the emergence of a new sex-system triggered the speciation process in the monotypic taxonOecomys auyantepui. In order to...
This post deals mainly with living examples of evolutionary intermediates between aquatic and terrestrial species, and I will cover the fossil record in more detail in a future post (and I have also briefly discussed the fascinating story of the discovery of Tiktaalik, a wonderful example of an...
in all unicellular holozoans are part of the two-component signaling system that has been lost in animals, suggesting the continued use of this system in the closest relatives of animals and emphasizing the importance of studying loss of function as well as gain in major evolutionary transitions...
Osteoblast-lineage calcium/calmodulin-dependent kinase 2 delta and gamma regulates bone mass and quality. November 21, 2023 [ MEDLINE Abstract ] Dual thermal ecotypes coexist within a nearly genetically identical population of the unicellular marine cyanobacterium Synechococcus. November 21, 2023 [...
本期Science论文汇总：【1】Vitamin A resolves lineage plasticity to orchestrate stem cell lineage choices（维生素A解决谱系可塑性问题以协调干细胞谱系选择）：该研究发现维生素A对成年毛囊干细胞的影响，指导其选择不同的细胞命运，有助于深入了解干细胞谱系决策的机制。视黄酸，这种由维生素A（视黄醇）...
This software is provided with a set of classes that model entities such as mutations, chromosomes, individuals, and subpopulations. These entities can be simulated under different evolutionary scenarios, including selection events, migration of individuals between subpopulations, specific mate choice, etc...
Here we describe a new mazaediate species belonging to the Eurotiomycetes. The multigene phylogeny produced (7 gene regions: nuLSU, nuSSU, 5.8S nuITS, mtSSU, RPB1, RPB2 and MCM7) placed the new species in a lineage sister to Eurotiomycetidae. Based on the evolutionary relationships ...
Currently, two main groups of concepts of species as a taxonomic category have numerous supporters among taxonomists: the mixiological species concept, BSC or mayron, as a protected gene pool; and the phylogenetic species concept, PSC or simpson, as an isolated, independent evolutionary lineage,...