For taxonomic hierarchy, there’s some sense in which the phylum and the species both have rigorous currency, however the intermediary levels are a kind of construct.
Phylum and division are both listed under the same taxonomic ranks. The wikipedia page for phylum states that Traditionally, in botany the term division was used instead of "phylum", although from 1993 the International Code of Nomenclature for algae, fungi, and plants accepted the designation "phylum". What you have to keep in mind is that the scientists categorizing plants and animals worked ...
Where in the "ranks" of taxonomy (domain, kingdom, phylum etc.) do common words used to describe animals such as amphibian and reptile fall?
So I have trouble remembering the order of taxonomy for classification. i.e domain>kingdom>phylum>class>order>family>genus>species I can never remember it, is there an good mnemonic to remember them?
Thanks for the answer; if I could as a follow up question: In my class we are just focusing on 6 phyla of animals: Porifera, Chordata, Mollusca, Cnidaria, Arthropoda, Echinodermata. Is it possible to say that some of these phyla are completely composed entirely of protostomes, and some of deuterostomes?
So I may cite from Wikipedia: The term phylum was coined in 1866 by Ernst Haeckel from the Greek phylon (φῦλον, "race, stock"), related to phyle (φυλή, "tribe, clan"). [4] In plant taxonomy, August W. Eichler (1883) classified plants into five groups named divisions, a term that remains in use today for groups of plants, algae and fungi. [1] [5] The definitions of zoological phyla ...