In biology, a phylum (/ˈfaɪləm/; pl.: phyla) is a level of classification or taxonomic rank below kingdom and above class. Traditionally, in botany the...

(/ˈkɔːrdeɪt/ KOR-dayt) is a deuterostomic bilaterial animal belonging to the phylum Chordata (/kɔːrˈdeɪtə/ kor-DAY-tə). All chordates possess, at some point...

Nematoda), roundworms or eelworms constitute the phylum Nematoda. They are a diverse animal phylum inhabiting a broad range of environments. Most species...

were long thought to have diverged first, representing the oldest animal phylum and forming a sister clade to all other animals. Despite their morphological...

zoological nomenclature, a subphylum is a taxonomic rank below the rank of phylum. The taxonomic rank of "subdivision" in fungi and plant taxonomy is equivalent...

into complexes. A top-level (i.e., the largest) family is often called a phylum or stock. The closer the branches are to each other, the more closely the...

Arthropods (/ˈɑːrθrəpɒd/ ARTH-rə-pod) are invertebrates in the phylum Arthropoda. They possess an exoskeleton with a cuticle made of chitin, often mineralised...

Sponges or sea sponges are members of the metazoan phylum Porifera (/pəˈrɪfərəˌ pɔː-/ pər-IF-ər-ə, por-; meaning 'pore bearer'), a basal animal clade and...

annelids (/ˈænəlɪdz/), also known as the segmented worms, comprise a large phylum called Annelida (/əˈnɛlɪdə/; from Latin anellus 'little ring'). It contains...

(also known as the Polyzoa, Ectoprocta or commonly as moss animals) are a phylum of simple, aquatic invertebrate animals, nearly all living in sedentary...

(also called Apicomplexia; single: apicomplexan) are organisms of a large phylum of mainly parasitic alveolates. Most possess a unique form of organelle...

classification (taxonomy) consists of species, genus, family, order, class, phylum, kingdom, and domain. While older approaches to taxonomic classification...

Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (/ˈmɒləsks/). Around 76,000 extant species of...

Ancient Greek κτείς (kteis) 'comb' and φέρω (pherō) 'to carry') comprise a phylum of marine invertebrates, commonly known as comb jellies, that inhabit sea...

Candidate phylum TG3 (aka candidate division Termite Group 3 or Chitinivibrionia Sorokin et al. 2014) is a candidate phylum that is closely related to...

echinoderm (/ɪˈkaɪnəˌdɜːrm, ˈɛkə-/) is any deuterostomal animal of the phylum Echinodermata (/ɪˌkaɪnoʊˈdɜːrmətə/), which includes starfish, brittle stars...

Lophotrochozoa Phylum Hyolitha † Phylum Annelida Phylum Brachiopoda Phylum Bryozoa Phylum Cycliophora Phylum Entoprocta Phylum Mollusca Phylum Nemertea Phylum Phoronida...

century, and even became elevated to a variety of higher ranks, including phylum, subkingdom, kingdom, and then sometimes included within the similarly paraphyletic...

Cnidaria (/nɪˈdɛəriə, naɪ-/ nih-DAIR-ee-ə, NY-) is a phylum under kingdom Animalia containing over 11,000 species of aquatic animals found both in fresh...

principal ranks in modern use are domain, kingdom, phylum (division is sometimes used in botany in place of phylum), class, order, family, genus, and species...

order of size are life, domain, kingdom, phylum, order, family, genus, and species, with class ranking between phylum and order. The class as a distinct rank...

The phylum Bacteroidota (synonym Bacteroidetes) is composed of three large classes of Gram-negative, nonsporeforming, anaerobic or aerobic, and rod-shaped...

and snails, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (/ɡæsˈtrɒpədə/). This class comprises snails...

The Chloroflexota are a phylum of bacteria containing isolates with a diversity of phenotypes, including members that are aerobic thermophiles, which use...

NC10 is a bacterial phylum with candidate status, meaning its members remain uncultured to date. The difficulty in producing lab cultures may be linked...

meaning "flat" and ἕλμινς (root: ἑλμινθ-), helminth-, meaning "worm") are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates...

(synonym Proteobacteria) is a major phylum of Gram-negative bacteria. Currently, they are considered the predominant phylum within the realm of bacteria. They...

protists Phylum Ciliophora – Taxon of protozoans with hair-like organelles called cilia Phylum Apicomplexa – Phylum of parasitic alveolates Phylum Dinoflagellata –...

A spirochaete (/ˈspaɪroʊˌkiːt/) or spirochete is a member of the phylum Spirochaetota (also called Spirochaetes /ˌspaɪroʊˈkiːtiːz/), which contains distinctive...

This article is a list of orders contained within Bilateria separated by phylum. Groups that are not contained within an order are listed separately. Annelid...