Flowering plants are also ecologically diverse and are found in every terrestrial habitat, as well as both fresh and saltwater habitats.The estimation of phylogenetic divergence times from sequence data is an important component of many molecular evolutionary studies.However, if morphology is to be employed to its full potential, biologists need to start scrutinising phenotypes in a more objective fashion, models of phenotypic evolution need to be improved, and approaches for analysing phenotypic traits and fossils together with genomic data need to be refined.The family Phalangeridae comprises approximately two dozen extinct and extant species that include the brushtail possums (Trichosurus), scaly-tailed possum (Wyulda) and cuscuses (Phalanger, Strigocuscus, Spilocuscus and Ailurops). The phylogenetic relationships of living phalangerids (Phalangeroidea: Marsupialia) with a suggested new taxonomy.
A related method, penalized likelihood, was subsequently implemented in a maximum-likelihood framework (Sanderson 2002). The new relaxed-clock methods have also introduced more flexible techniques for incorporating calibrations, leading to a lively discussion about approaches to calibrating estimates of divergence times (Graur and Martin 2004; Hedges and Kumar 2004; Donoghue and Benton 2007; Ho 2007). In ‘Biogeography and Geological Evolution of SE Asia’. : It has been 8 years since the last comprehensive analysis of divergence times across the angiosperms.Evolutionary trees underpin virtually all of biology, and the wealth of new genomic data has enabled us to reconstruct them with increasing detail and confidence.While phenotypic (typically morphological) traits are becoming less important in reconstructing evolutionary trees, they still serve vital and unique roles in phylogenetics, even for living taxa for which vast amounts of genetic information are available.