annelid
81Annelida (classification phylogénétique) — Cette page a pour objet de présenter un arbre phylogénétique des Annelida (Annélides ou Vers annelés), c est à dire un cladogramme mettant en lumière les relations de parenté existant entre leurs différents groupes (ou taxa), telles que les… …
82Gilberto Righi — (1937 1999) était un biologiste et taxonomiste brésilien. Ayant passé une grande partie de sa carrière à l université de São Paulo (Brésil), il a apporté, du milieu des années 1960 à la fin des années 1990, une contribution inestimable à la… …
83leech — leech1 leechlike, adj. /leech/, n. 1. any bloodsucking or carnivorous aquatic or terrestrial worm of the class Hirudinea, certain freshwater species of which were formerly much used in medicine for bloodletting. 2. a person who clings to another… …
84Leech — /leech/, n. Margaret, 1893 1974, U.S. historian, novelist, and biographer. * * * Any annelid worm of the class Hirudinea (about 300 known species), with a small sucker containing the mouth at the front end and a large sucker at the back end.… …
85skeleton — skeletonless, adj. skeletonlike, adj. /skel i tn/, n. 1. Anat., Zool. the bones of a human or an animal considered as a whole, together forming the framework of the body. 2. any of various structures forming a rigid framework in an invertebrate.… …
86endocrine system — Group of ductless glands that secrete hormones necessary for normal growth and development, reproduction, and homeostasis. The major endocrine glands are the hypothalamus, pituitary, thyroid, islets of Langerhans, adrenals, parathyroids, ovaries …
87tube worm — Any of numerous species of sedentary, solitary or colonial, marine worms that spend their entire life in a tube made from special secretions or from sand grains glued together. Found worldwide, tube worms range from less than an inch (25 mm) to… …
88lobopod — ▪ animal collective name for two phyla of animals: Onychophora (velvet worm) and Tardigrada (tardigrade). Phyla Onychophora and Tardigrada have long been considered separate from their close arthropod relatives. Both groups have similar… …
89velvet worm — ▪ invertebrate phylum any of about 70 wormlike species of ancient, terrestrial invertebrates with short, thick legs and a dry, velveteen body. Onychophorans range in size from 14 to 150 mm (about 0.6 to 6 inches) and are found in rainforests.… …
90leech — 1. A bloodsucking aquatic annelid worm (genus Hirudo, class Hirudinea) sometimes used in medicine for local withdrawal of blood.For various l. species, see Hirudo. 2. To treat …
