Skeleton of a greater mouse-eared bat (Myotis myotis)
The Euteleostomi, also called Neoteleostomi, Neognathostomata or Osteognathostomata are a taxon used in the phylogenetic systematics ( a systematic group ) to which, with the exception of the hagfish, the lamprey and the cartilaginous fish, all now living vertebrates ( Vertebrata ) - including humans - include. For you to include the traditional, but not monophyletic taxon Osteichthyes ( Osteichthyes ) and the land vertebrates ( Tetrapoda ). The monophyletic Untertaxa the Euteleostomi are the ray-finned fishes ( Actinopterygii ) and the muscle -finned fishes ( Sarcopterygii ), which in terms of cladistics and the land vertebrates to be counted.
Important autapomorphies of Euteleostomi are a bony internal skeleton, which can be also largely regressed back to a cartilaginous skeleton (eg the sturgeon species ), and over sutures indented skull. Most Euteleostomi have a swim bladder or lung. A spiracle is present only in some original groups. In the blood, we find only a low concentration of urea and trimethylamine oxide ( exceptions are the lungfishes and Latimeria ). The osmotic balance can be maintained only by an energy -consuming transfer process.