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  2. Scyphozoa - Wikipedia

    en.wikipedia.org/wiki/Scyphozoa

    The Scyphozoa are an exclusively marine class of the phylum Cnidaria, [2] referred to as the true jellyfish (or "true jellies"). The class name Scyphozoa comes from the Greek word skyphos (σκύφος), denoting a kind of drinking cup and alluding to the cup shape of the organism. [3] Scyphozoans have existed from the earliest Cambrian to the ...

  3. Taxonomic rank - Wikipedia

    en.wikipedia.org/wiki/Taxonomic_rank

    In biology, taxonomic rank (which some authors prefer to call nomenclatural rank [1] because ranking is part of nomenclature rather than taxonomy proper, according to some definitions of these terms) is the relative or absolute level of a group of organisms (a taxon) in a hierarchy that reflects evolutionary relationships.

  4. Phylum - Wikipedia

    en.wikipedia.org/wiki/Phylum

    The hierarchy of biological classification's eight major taxonomic ranks.A kingdom contains one or more phyla. Intermediate minor rankings are not shown. In biology, a phylum (/ ˈ f aɪ l əm /; pl.: phyla) is a level of classification or taxonomic rank below kingdom and above class.

  5. List of systems of the human body - Wikipedia

    en.wikipedia.org/wiki/List_of_systems_of_the...

    This is an accepted version of this page This is the latest accepted revision, reviewed on 31 January 2025. List of organ systems in the human body Part of a series of lists about Human anatomy General Features Regions Variations Movements Systems Structures Arteries Bones Eponymous Foramina Glands endocrine exocrine Lymphatic vessels Nerves Organs Systems Veins Muscles Abductors Adductors ...

  6. Rhopalium - Wikipedia

    en.wikipedia.org/wiki/Rhopalium

    In tandem with a “touch plate” which is situated near the spot-ocellus, tilt and gravity during the jellies' movements pulls downward on the dense lithocyst, which bends the entire rhopalial body such that the cells of the touch plate are either distant from or making contact with the lithocyst hood; this physical mechanism is how the ...

  7. Body plan - Wikipedia

    en.wikipedia.org/wiki/Body_plan

    Evolutionary developmental biology – Comparison of organism developmental processes; Definition of Phylum based on body plan – High level taxonomic rank for organisms sharing a similar body plan; Ediacaran biota – Life of the Ediacaran period; Macroevolution – Evolution on a scale at or above the level of species

  8. Medusozoa - Wikipedia

    en.wikipedia.org/wiki/Medusozoa

    Scyphozoa is the group commonly known as "true jellyfish" and occur in tropical, temperate and polar seas worldwide. Scyphozoans generally have planula larvae that develop into sessile polyps. These reproduce asexually, producing similar polyps by budding, and then either transform into medusae, or repeatedly bud medusae from their upper ...

  9. Coelenterata - Wikipedia

    en.wikipedia.org/wiki/Coelenterata

    Coelenterata is a term encompassing the animal phyla Cnidaria (corals, true jellies, sea anemones, sea pens, and their relatives) and Ctenophora (comb jellies). The name comes from Ancient Greek κοῖλος (koîlos) 'hollow' and ἔντερον (énteron) 'intestine', referring to the hollow body cavity common to these two phyla.