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A chordate (/ ˈkɔːrdeɪt / KOR-dayt) is a deuterostomic bilaterial animal belonging to the phylum Chordata (/ kɔːrˈdeɪtə / kor-DAY-tə). All chordates possess, at some point during their larval or adult stages, five distinctive physical characteristics (synapomorphies) that distinguish them from other taxa.
Order Acanthothoraci. Order Arthrodira. Order Antiarchi. Order Brindabellaspida. Order Petalichthyida. Order Phyllolepida. Order Ptyctodontida. Order Rhenanida. Order Pseudopetalichthyida (The placement of this order is debated.)
t. e. Mammalia is a class of animal within the phylum Chordata. Mammal classification has been through several iterations since Carl Linnaeus initially defined the class. No classification system is universally accepted; McKenna & Bell (1997) and Wilson & Reader (2005) provide useful recent compendiums. [1] Many earlier ideas from Linnaeus et ...
Intermediate minor rankings are not shown. In biology, taxonomic rank is the relative level of a group of organisms (a taxon) in an ancestral or hereditary hierarchy. A common system of biological classification (taxonomy) consists of species, genus, family, order, class, phylum, kingdom, and domain. While older approaches to taxonomic ...
Human taxonomy. Human taxonomy is the classification of the human species (systematic name Homo sapiens, Latin: "wise man") within zoological taxonomy. The systematic genus, Homo, is designed to include both anatomically modern humans and extinct varieties of archaic humans. Current humans have been designated as subspecies Homo sapiens sapiens ...
The class Graptolithina, formerly considered extinct, [1] is now placed within the pterobranchs, represented by a single living genus Rhabdopleura. Acorn worms are solitary worm-shaped organisms. They generally live in burrows (the earliest secreted tubes) [ 2 ] and are deposit feeders, but some species are pharyngeal filter feeders , while the ...
Actinopterygii. Actinopterygii (/ ˌæktɪnɒptəˈrɪdʒiaɪ /; from actino- 'having rays' and Ancient Greek πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish [ 2 ] that comprise over 50% of living vertebrate species. [ 3 ]
Cichla ocellaris. Bloch & Schneider, 1801. Cichliformes / ˈsɪklɪfɔːrmiːz / is an order of fishes. Its members were previously classified under the order Perciformes, but now many authorities consider it to be an independent order within the subseries Ovalentaria. The earliest fossils are known from the Eocene.