acanthodians

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• List of acanthodians — This list of acanthodians is an attempt to create a comprehensive listing of all genera that have ever been included in the subclass Acanthodii, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera… …   Wikipedia

• 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

• Acanthodii — Taxobox name = Acanthodii fossil range = Early Silurian to Permian image width = 250px image caption = Acanthodes bronni regnum = Animalia phylum = Chordata subphylum = Vertebrata infraphylum = Gnathostomata classis = Acanthodii subdivision ranks …   Wikipedia

• Prehistoric fish — are various groups of fishes that lived before recorded history. A few, such as the coelacanth still exist today and are considered living fossils.The first fish and the first vertebrates, were the ostracoderms, which appeared in the Cambrian… …   Wikipedia

• Otolith — organs showing detail of utricle, ococonia, endolymph, cupula, macula, hair cell filaments, and saccular nerve …   Wikipedia

• Teleostomi — Taxobox name = Teleostomi fossil range = Latest Ordovician Recent image width = 230px image caption = The Northern bluefin tuna regnum = Animalia phylum = Chordata subphylum = Vertebrata infraphylum = Gnathostomata unranked classis = Teleostomi… …   Wikipedia

• Mesacanthus — Temporal range: Early Devonian Scientific classification Kingdom: Animalia Phylum …   Wikipedia

• Cheiracanthus — Temporal range: Middle Devonian Scientific classification Kingdom: Animalia Phy …   Wikipedia

• Psarolepis — |year=2001 |chapter=Something Fishy in the Family Tree |title=Rise of the dragon: Readings from Nature on the Chinese Fossil Record |publisher=University of Chicago Press |pages=pp.64 66||isbn=0226284913] . This new find was the strange fossil… …   Wikipedia

• Climatius — ▪ paleontology       genus of extinct, primitive jawed vertebrates common as fossils in Devonian rocks in Europe and North America (the Devonian period began 408 million years ago and ended about 360 million years ago). Climatius is… …   Universalium