to fully understand evolutionary grades, one must first get a better understanding of phylogenetics: the study of the evolutionary history and relationships...

Development and Evaluation (GRADE) approach Evolutionary grade, a paraphyletic group of organisms Graded bedding, a description of the variation in grain...

wastebasket taxon may in some cases be retained as the designation of an evolutionary grade, however. The term was coined in a 1985 essay by Stephen Jay Gould...

studies have shown a supporting amount of evidence that Miacoidea is an evolutionary grade of carnivoramorphs that, while viverravids are monophyletic basal...

scientists believed that modern ungulates were descended from an evolutionary grade of mammals known as the condylarths. The earliest known member of...

protists were at that time thought to be "primitive forms", and thus an evolutionary grade, united by their primitive unicellular nature. Understanding of the...

no longer considered a valid grouping, but rather a paraphyletic evolutionary grade of basal mammals and mammaliaform cynodonts. Most of the animals in...

Gryposuchinae and Gryposuchus might be paraphyletic and rather an evolutionary grade towards the gharial. The type species of Gryposuchus is G. jessei...

(clade) exclusive of other tetrapods. Instead, they consistute an evolutionary grade (a paraphyletic group), ancestral to living tetrapods such as lissamphibians...

schemes have stabilized on a system where Rauisuchia is rendered an evolutionary grade, or even a wastebin taxon. Crocodylomorphs most likely originated...