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 deuterostomal bilaterian 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...

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...

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...

chordates, the latter of which contains the vertebrates. The much smaller basal phylum Xenacoelomorpha have an uncertain position within Bilateria. Animals first...

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

segmented worms, comprise a large phylum called Annelida (/əˈnɛlɪdə/; from Latin anellus 'little ring'). The phylum contains over 22,000 extant species...

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

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

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

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

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

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

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...

Sponges or sea sponges are primarily marine invertebrates of the metazoan phylum Porifera (/pəˈrɪfərəˌ pɔː-/ pər-IF-ər-ə, por-; meaning 'pore bearer'), a...

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

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

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

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

Vertebrata with some 65,000 species, by far the largest grouping in the phylum Chordata. The vertebrates include mammals, birds, amphibians, and various...

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...

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

in which various terms, such as species, genus, family, order, class, phylum, kingdom, and domain designate rank. This page emphasizes absolute ranks...

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

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

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

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...