freshwater hydroids

См. также в других словарях:

• freshwater jellyfish — ▪ hydrozoan  any medusa, or free swimming form, of the genus Craspedacusta, class Hydrozoa (phylum Cnidaria). Craspedacusta is not a true jellyfish; true jellyfish are exclusively marine in habit and belong to the class Scyphozoa (phylum… …   Universalium

• cnidarian — /nuy dair ee euhn/, n. 1. any invertebrate animal, as a hydra, jellyfish, sea anemone, or coral, considered as belonging to the phylum Cnidaria, characterized by the specialized stinging structures in the tentacles surrounding the mouth; a… …   Universalium

• Bryozoa — Temporal range: Upper Cambrian–Recent[1] …   Wikipedia

• Hydrozoa — Taxobox name = Hydrozoa image width = 240px image caption = Closeup of a hydrozoan colony regnum = Animalia subregnum = Eumetazoa phylum = Cnidaria subphylum = Medusozoa classis = Hydrozoa classis authority = Owen, 1843 subdivision ranks =… …   Wikipedia

• Hydroid — may refer to:Marine BiologyColonial, plant like animals closely related to jellyfish, with stinging cellsany member of the invertebrate order Hydroida (class Hydrozoa, phylum Cnidaria). Hydroids have three basic life cycle stages: (1) a tiny free …   Wikipedia

• hydroid — /huy droyd/, adj. 1. noting or pertaining to that form of hydrozoan that is asexual and grows into branching colonies by budding. n. 2. the phase of a hydrozoan coelenterate that consists of polyp forms usually growing as an attached colony.… …   Universalium

• Social behaviour in animals — Introduction       actions of animals living in communities. Such behaviour may include the feeding of the young, the building of shelters, or the guarding of territory. General characteristics       Social behaviour (Social behaviour in animals) …   Universalium

• Mollusca — Temporal range: Cambrian–Recent …   Wikipedia

• Gastropoda — Gastropod Temporal range: Late Cambrian–Recent[1] …   Wikipedia

• Jellyfish — For other uses, see Jellyfish (disambiguation). Jellyfish Temporal range: 505–0 Ma …   Wikipedia

• Nelson Annandale — Nelson Annandale. Thomas Nelson Annandale est un zoologiste et un anthropologue écossais, né le 15 juin 1876 à Édimbourg et mort le 10 avril 1924 à Calcutta. Fils d’un chir …   Wikipédia en Français