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Urochordates = Tunicates = Sea squirts Protochordates include (See figure 2-2 in text)
Underappreciated beauty of tunicates
Notochord Dorsal hollow nerve cord Pharynx with endostyle Muscular post anal tail Adhesive surface Larva “stands on its head” and attaches to surface
Urochordate larva – diagrams don’t do it justice!
Cephalochordates = Amphioxus = Lancelets (See figure 2-2 in text)
Living Agnaths - Lamprey Hagfish Where’s the link to protochordates?
Lamprey larva = Ammocoetes Tunicate larva See figure 3-6
Lamprey- Vertebrate Ectoparasites
Estimates of 30-40lbs of fish killed by a lamprey in adult life span
Human influences 1800’s Erie canal Weeland canal around Niagra falls !
Lamprey Control: Exploiting basic natural history
Lamprey Control: Larvicides and spawning barriers
AKA Slime eels!
Even Hagfish can be beautiful!
Ordovician Agnaths - Ostracoderms
Myllokumingia Haikouichthys A Recent Surprise – Vertebrates (or at least Craniates) in the Cambrian!!!!
Deuterostomes. Phylum Echinodermata Water vascular system Starfish moving view from aboral surface Starfish moving view from oral surface.
Chordates and Vertebrates The Agnatha – Jawless Fish.
Phylum Chordata The chordates. Five Chordate Hallmarks Notochord – flexible rodlike structure; extending length of body.
Unit 8 Chapter 29 Echinoderms and Invertebrate Chordates.
Taylor Jordan. Vertebrate Classes Agnatha Chondrichthyes Osteichthyes Amphibia Reptilia Mammalia.
+ Phylum Chordata The Lower Chordates. + The Phylum Chordata Includes: 1. Subphylum Cephalochordata (=lancelets) 2. Subphylum Urochordata (= tunicates)
The Chordates. Kingdom - Animalia Phylum - Chordates Subphylum – 1- Vertebrata Invertebrates 2- Cephalochordata 3- Urochordata.
Phylum Cordata Introduction to the Fish Protochordates and Jawless Fishes.
PHYLUM CHORDATA notochord dorsal, hollow nerve tube gill slits post anal tail.
Phylum Chordata the chordates. Phylum Chordata chordates Primary characters include: –Notochord.
Part 3 “Fishes” – an introduction. “Fishes” Vertebrata.
Urochordata. Marine animals, live in all seas from shore to depth Suspension feeders Adult sessile, solitary or colonial Only larva with notochord.
What is a Vertebrate? Vertebrate Anatomy – Unit 1.
Introduction to Chordates Chapter 15. Basics Bilateral symmetry Segmented body Three germ layers Well-developed Coelom Endoskeleton Complete digestive.
Contents Jenna Hellack Fall 2000 Lesser Deuterostome Phyla and Phylum Chordata(through agnathans)
Chordates Chapter 23. Phylum Chordata By the end of the Cambrian period, 540 million years ago, an astonishing variety of animals inhabited Earth’s oceans.
Hanna Hetrick. Agnatha The oldest class of vertebrates Includes lampreys and hagfish.
Invertebrate Chordates Hemichordata Urochordata Cephalochordata.
Origin and Early History of the Vertebrates. The Protochordates as Ancestors Some living chordate groups may resemble the primitive vertebrate ancestors.
PHYLUM CHORDATA n THREE COMMON CHARACTERISTICS n I. NOTOCHORD; a cartilage support n rod sometime during development. n II. DORSAL NERVE CORD ;central.
Phylum Chordata. Nonvertebrate chordates Fishes Amphibians Reptiles Birds Mammals Invertebrate ancestor Chordate Cladogram.
Echinoderms & Early Chordates Second major branch of animal evolution Present in Cambrian period *Crinoids (sea lilies) dominant at end of Paleozoic Deuterostomes.
Origin of Chordates BIOL 495 – Chapter Two. Comparative Vertebrate Anatomy.
Lecture #14 Phylum Chordata: The vertebrate Phylum.
Marine Fishes BIOL265 Dave Werner. Kingdom Animalia – Phylum Chordata Major Characteristics found in all chordates: 1. Notochord – a stiff but flexible.
To be classified into this Phylum, members must have the following characteristics at some point in their development 1. Hollow Dorsal Nerve Cord Nerve.
Phylum Chordata. Deuterostomes The four traits ALWAYS –Notochord –Pharyngeal slits/pouches –Hollow, dorsal nerve cord –Postanal tail Other traits –Endostyle.
Animal Diversity 3 Deuterostomes: Echinodermata and Chordata.
The 7 classes of vertebrates By Alissa Hindman. Agnatha The oldest class Jawless It includes lampreys which is a fish There are no paired fins 7 external.
Early Chordates, Craniate and vertebrate origins Where does it start? Part 1.
Lecture #2 - August 27, 2008 Reading for Today: pgs , , A few more phylogenetic terms. 2. Building a tree a. synapomorphies & homologies.
Chordates 1. Chordate Taxonomy Chordates: 1.Single dorsal hollow nerve cord 2.Gill slits 3.Notochord.
Chordata Aubrey Irwin. Agnatha Oldest Class of Vertebrates* Jaw-less animals Cylinder, eel-shaped body The notochord persists in the adult The skeleton.
Chordates are Bilaterian Deuterostomes. Phylogeny (cont.) 5 Classes (before tetrapods) 1.Agnatha Jawless fish; hagfish and lampreys 2.Chrondrichthes Sharks,
Phylum Chordata Sub-phyla: Urochordata, Cephalochordata & Vertebrata Superclasses: Agnatha & Gnathostomata.
Fig Dorsal, hollow nerve cord Anus Muscular, post-anal tail Pharyngeal slits or clefts Notochord Mouth Muscle segments.
Nonvertebrate Chordates, Fishes, and Amphibians. What Is a Chordate? Members of the phylum Chordata are called chordates. A chordate is an animal that.
Chordata. Phylum Chordata Bilateral, Deuterostomate development Notochord Dorsal hollow nerve cord Pharyngeal slits Muscular Post-anal tail Segmented.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. CHAPTER 15 Chordates 23-1.
Chapter 7 Phylum Hemichordata Phylum Chordata. Phylum Hemichordata Characteristics: Characteristics: –Rare group, but these worms seem to span a gap between.
Copyright © 2005 Pearson Prentice Hall, Inc. Chapter 23 Animal Diversity II: Vertebrates.
Chordates An Introduction. Kingdom Animalia- All inverts & verts 1.Phylum Chordata: All have nerve cords. 3 subphyla : A- Urochordata (tunicates aka sea.
Chordates Zoology Donald Winslow 4 April 2008 Following Hickman et al. 2008, Ch 23 pp , , 512 (protochordates & early vertebrates) Ch 24.
Phylum Chordata. Section 30-1 Nonvertebrate chordates Fishes Amphibians Reptiles Birds Mammals Invertebrate ancestor Chordate Cladogram.
Agnatha By: Bryce Carr. Agnatha Phylum Tree Characteristics of the kingdom Eukaryotic Multicellular They are heterotrophic Generally digests food in.
02 Sept. 2014Fishes.ppt1 FISHES. 02 Sept. 2014Fishes.ppt2 Fishes All fishes retain four (4) primitive characters: Streamlined body Vertical tail fin Gills.
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