Classification of Chondrichthyes | Vertebrates | Chordata | Zoology
In this article we will discuss about the classification of chondrichthyes. Class 4. Chondrichthyes (Gr., chondros = cartilage; ichthys = fish): 1. Mostly marine and predaceous. 2. Body fusiform and spindle-shaped. 3. Fins both median and paired, all supported by fin-rays. Pelvic fins bear claspers in male. Tail heterocercal. 4. Skin covered with placoid scales or naked and bears mucous [...]