ossified centra

См. также в других словарях:

• fish — fishless, adj. /fish/, n., pl. (esp. collectively) fish, (esp. referring to two or more kinds or species) fishes, v. n. 1. any of various cold blooded, aquatic vertebrates, having gills, commonly fins, and typically an elongated body covered with …   Universalium

• Fish — /fish/, n. Hamilton, 1808 93, U.S. statesman: secretary of state 1869 77. * * * I Any of more than 24,000 species of cold blooded vertebrates found worldwide in fresh and salt water. Living species range from the primitive lampreys and hagfishes… …   Universalium

• holostean — ▪ fish Introduction       any member of a group of primitive bony fishes (bony fish) that make up one of the three major subdivisions of the superclass Actinopterygii (ray finned fishes). Holosteans are represented today by the bowfins (bowfin)… …   Universalium

• acentrous — adjective lacking vertebral centra Some bony fishes (Teleostei, Amia, Lepisosteus, and Brachiopterygii) have well ossified centra and neural and hemal arches. Others (Dipnoi, Latimeria, and Chondrostei) lack centra (acentrous), and the notochord… …   Wiktionary

• skeleton — 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.… …   Universalium

• Snake skeleton — A snake skeleton consists primarily of the skull, vertebrae, and ribs, with only vestigial remnants of the limbs. Contents 1 Skull …   Wikipedia

• Anura — ▪ amphibian order Introduction also called  Salientia    one of the major extant orders of the class Amphibia (amphibian). It includes the frogs (frog) and toads (toad), which, because of their wide distribution, are known by most people around… …   Universalium

• Allosaurus — Eumetazoa Allosaurus Temporal range: Late Jurassic, 155–150 Ma …   Wikipedia

• Choristodera — Choristoderes Temporal range: Middle Jurassic Miocene, 165–20 Ma …   Wikipedia

• Morganucodonta — Temporal range: Late Triassic to Middle Jurassic This diagram shows the Morganucodont double jaw joint. Scientific classification Kingdom …   Wikipedia

• chondrichthian — /kon drik thee euhn/, n. any member of the class Chondrichthyes, comprising the cartilaginous fishes. [ < NL, equiv. to chondr CHONDR + Gk ichthýes (pl.) fish] * * * ▪ fish class Introduction class name  Chondrichthyes,  or  Selachii    any… …   Universalium