Digest: Fossils, evolutionary models, and diatoms*
نویسندگان
چکیده
منابع مشابه
Diversity and Evolutionary History of Iron Metabolism Genes in Diatoms
Ferroproteins arose early in Earth's history, prior to the emergence of oxygenic photosynthesis and the subsequent reduction of bioavailable iron. Today, iron availability limits primary productivity in about 30% of the world's oceans. Diatoms, responsible for nearly half of oceanic primary production, have evolved molecular strategies for coping with variable iron concentrations. Our understan...
متن کاملCalibrating the Tree of Life: fossils, molecules and evolutionary timescales.
BACKGROUND Molecular dating has gained ever-increasing interest since the molecular clock hypothesis was proposed in the 1960s. Molecular dating provides detailed temporal frameworks for divergence events in phylogenetic trees, allowing diverse evolutionary questions to be addressed. The key aspect of the molecular clock hypothesis, namely that differences in DNA or protein sequence between two...
متن کاملOn fossils, phylogenies and sequences of evolutionary change.
We thank Britz et al. [1] for introducing Houy's [2] prescient interpretation of the significance of †Opisthomyzon for the evolution of modern remora anatomy , and regret not having discovered his elegant account ourselves [3]. Many prominent ichthyologists have considered the relevance of †Opisthomyzon since its discovery more than a century ago [4– 7], but none of their observations approache...
متن کاملIntegrating Fossils, Phylogenies, and Niche Models into Biogeography to Reveal Ancient Evolutionary History: The Case of Hypericum (Hypericaceae)
In disciplines such as macroevolution that are not amenable to experimentation, scientists usually rely on current observations to test hypotheses about historical events, assuming that "the present is the key to the past." Biogeographers, for example, used this assumption to reconstruct ancestral ranges from the distribution of extant species. Yet, under scenarios of high extinction rates, the...
متن کاملOn the evolutionary history of Ephedra: Cretaceous fossils and extant molecules.
Gnetales comprise three unusual genera of seed plants, Ephedra, Gnetum, and Welwitschia. Their extraordinary morphological diversity suggests that they are survivors of an ancient, more diverse group. Gnetalean antiquity is also supported by fossil data. Dispersed "ephedroid" (polyplicate) pollen first appeared in the Permian >250 million years ago (Myr), and a few megafossils document the pres...
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ژورنال
عنوان ژورنال: Evolution
سال: 2019
ISSN: 0014-3820,1558-5646
DOI: 10.1111/evo.13869