Only $2.99/month

Biology Lab Reviews Animalia

Terms in this set (118)

Hagfish (Myxini) marine scavengers that use oral tentacles to scavenge for food small, reduced eyes mucus glands for protection endoskeleton of cartilage with an incomplete cranium notochord retained in the adults agnathan - term used to describe a jawless craniate //// Lamprey (Petromyzontida) Agnathan (lack true jaws) Oral sucker used in feeding Parasites as adults Keratinized teeth & rasping tongue used to penetrate body of prey Cartilage endoskeleton Notochord is retained in the adults //// Cartilaginous fish (Chondrichthyes) Includes sharks, skates and rays Cartilage endoskeleton Well developed jaws with teeth (modified scales with hardened enamel) Ventrally located mouth Paired pectoral and pelvic fins Placoid scales Keen vision & olfaction Lateral line system for detecting vibrations in the water Ampullae of Lorenzini as electrical sensing pits Heterocercal caudal fin (upper lobe much different than lower lobe) Cloaca present; common opening to the digestive tract, excretory system & reproductive tract ///// Ray-finned fish (Actinopterygii) Includes trout, redfish, goldfish, carp, seahorse, etc (most fish!) Fins are soft with spiny rays of bone for improved directional control Operculum present; a bony plate covering gills for ventilation and protection Epidermal glands secrete mucus for protection Swim bladder for buoyancy control Lateral line system Homocercal caudal fin ///// Lobe-finned fish (Sarcopterygii) Includes lungfish & coelacanths Fins with larger, more prominent skeletal structures for support; are supported by very thick muscles resulting often in a "stubby" appearance Operculum Swim bladder Lateral line system