Chondrostei
National Institutes of Health
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Background: Sturgeons (Chondrostei: Acipenseridae) are a group of “living fossil” fishes at a basal position among Actinopteri…
Ray‐finned fishes (Actinopterygii) dominate modern aquatic ecosystems and are represented by over 32000 extant species. The vast…
Jurassic freshwater fish faunas are still poorly known, with the only assemblage of that age known from southern South America…
Einleitung (S. 541). Acrania (S. 544). Cyclostomi (S. 545). Pisces: Elasmobranchi: Selachii (S. 548). Holocephali (S. 553…
Sturgeons are bony fish that retain structural traits typical of the more primitive Chondrostei. From an evolutionary viewpoint…
Somatolactin (SL) is a newly characterized pituitary hormone belonging to the growth hormone-prolactin family. Until now SL has…
1 Introduction.- 1.1 Comparative Aspects of the Lower Vertebrate Kidney.- 1.2 Lower Aquatic Craniota.- 2 Material and Methods.- 2…