The aesthetic appeal of the water lilies, especially those of the genera Nymphaea and Victoria, has led to their worldwide cultivation.
However, genera of the Pyronemataceae lack unifying macroscopic or microscopic characteristics; this lack of uniting characters has led various authors to propose a variety of classification schemes.
Bacterial evolution has led to huge variations in the number of PDC/PAS proteins within all genera.
Therefore, it is an ideal candidate for inferring the evolutionary histories of ancient monotypic genera in subtropical China, e.g., inferring refugial locations and the predominant pattern of migration that has led to their present geographical range.
Despite physical similarities, molecular data has led to a taxonomic overhaul of the genus, with the majority of the North American species reassigned to the genera Doellingeria, Eurybia, Ionactis, Oclemena, and Symphyotrichum.
This has led to tantrums.
Recent changes to the classification of the composite genus, including the further division of the genera Aedes and Ochlerotatus have led to much confusion for non-taxonomists interested in potential vector mosquito species.
Cyclotella and Thalassiosira are especially large and morphologically diverse genera, though years of monographic research have led to numerous informally recognized morphological groups within each of them [ 34- 43].
It may also reflect the divergence of the two sloth genera about 20 million years ago [ 15], which may have led to the separation of the cohabiting eukaryotes as well.
