As nouns the difference between species and monophyly

is that species is a type or kind of thing while monophyly is in cladistics, the condition of being monophyletic, of including all descendants from a given ancestral species.

As nouns the difference between amphibian and gnathostome

is that amphibian is an animal of the amphibia; any four-legged vertebrate that does not have amniotic eggs, living both on land and in water while gnathostome is (zoology) any vertebrate with jaws, including amphibians, reptiles, mammals, and most modern fish.

As an adjective amphibian

is (obsolete) having two natures or amphibian can be of or relating to the amphibians amphibia.

As nouns the difference between reptile and gnathostome

is that reptile is while gnathostome is (zoology) any vertebrate with jaws, including amphibians, reptiles, mammals, and most modern fish.

As nouns the difference between mammal and gnathostome

is that mammal is an animal of the class mammalia, characterized by being warm-blooded, having hair and feeding milk to its young while gnathostome is (zoology) any vertebrate with jaws, including amphibians, reptiles, mammals, and most modern fish.

As a proper noun fish

is .

As a noun gnathostome is

(zoology) any vertebrate with jaws, including amphibians, reptiles, mammals, and most modern fish.

As an adjective cladistic

is of, relating to, or generated using cladistics.

As a noun ingroup is

in cladistics, the monophyletic group that includes all taxa of interest to the current study.

As an adjective monophyletic

is of, pertaining to, or affecting a single phylum (or other taxon) of organisms.

As a noun ingroup is

in cladistics, the monophyletic group that includes all taxa of interest to the current study.

In sociology terms the difference between group and ingroup

is that group is a subset of a culture or of a society while ingroup is the social group that one belongs to.

As nouns the difference between group and ingroup

is that group is a number of things or persons being in some relation to one another while ingroup is in cladistics, the monophyletic group that includes all taxa of interest to the current study.

As a verb group

is to put together to form a group.

As nouns the difference between taxa and ingroup

is that taxa is plural of lang=en while ingroup is in cladistics, the monophyletic group that includes all taxa of interest to the current study.

As nouns the difference between study and ingroup

is that study is a state of mental perplexity or worried thought while ingroup is in cladistics, the monophyletic group that includes all taxa of interest to the current study.

As a verb study

is to revise materials already learned in order to make sure one does not forget them, usually in preparation for an examination.