F_W 1100 Study Guide - Midterm Guide: Pedicellaria, Foregut, Pupa
11 Mar 2014
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Cladistics includes only monophyletic groupings: notochord: muscle attachment and endoskeleton, dorsal tubular nerve cord: brain arises from it, post anal tail: greater movement, endostyle or thyroid helps with metabolism and iodinated proteins filter feeding, pharyngeal pouches or slits: filter feeding/respiration, subphylum urochordata are chordates because their larval forms have the 5 hallmark characteristics even though their adult forms go through metamorphosis and do not, amphioxus are interesting to zoologists because they still show the 5 hallmark characteristics in the adult form. Chapter 24: fish aren"t monophyletic they don"t include tetrapods, fish/fishes, hagfishes and lampreys are in subphylum vertebrata because they have a cranium, gnathostomes have a jaw, aquatic vertebrate that has gills, fins, w shaped myomeres, they use swimming for locomotion, and have a swim bladder for buoyancy, class myxini: hagfishes, class petromyzontida: lampreys; keratinized teeth and anticoagulant, class sarcopterygii: lobe finned; have rhipidistian lineages, class.
