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Higher Chordates: Fishes & Amphibians Chapter 34
Recall: Subphylum Urochordata –Tunicates Subphylum Cephalochordata –Lancelets Class Myxini –Hagfish –Least derived craniate lineage still surviving Chordates with a head
Subphyla Vertebrata Endoskeleton –Vertebrae: bone or cartilage Closed circulatory system –Single well developed heart Skull with a brain –Anterior to the spinal cord Extinct vertebrate: –Conodont
Class Agnatha Jawless fish –Ostracoderms extinct –Cyclostomes Lampreys, hagfish Lack paired fins, scales First organisms with a backbone Appeared 500 mya
Class Acanthodia Spiny fish Developed jaws with bony edges –Gnathostomes Internal skeletons of cartilage Extinct Appeared 430 mya
Class Placodermi Fish with massive heads Extinct Appeared 410 mya
Class Chondricthyes Cartilage fish (bone in teeth & scales) Sharks, skates, rays, ratfish & chimeras Appeared 400 mya
Chondricthyes characteristics Premier Predators –Streamlined body (power, not grace) –Oil bladder (buoyancy) –Acute vision (but colorblind) –Detect electric fields
Chondricthyes characteristics Reproduction (variety) –Oviparous lay eggs externally –Ovoviviparous keep eggs in uterus until hatching –Viviparous Placenta – live birth
Class Osteichthyes Ossification of the skeleton (Bone) Draw H 2 O across gills –Operculum bony covering Swim bladder (buoyancy) Mostly oviparous Appeared 400 mya 95% of today’s fishes
Subclass Actinopterygii Ray finned fish –Bony rays in fins for maneuvering, defense, and other functions
Subclass Sarcopterygii Lobe finned fish –Rod-shaped bones in fins surrounded with thickened layer of muscle –Swim or “walk” across substrate Actinista (coelacanth) Dipnoi (lungfish)
Evolution of tetrapods One of the most significant events in vertebrate history was when the fins of some lobe-finned organism evolved into the limbs and feet of tetrapods
Class Amphibia “Two lives” –aquatic larva develops into a terrestrial adult Gas exchange –Lungs and moist skin All amphibians must lay eggs in water
Order Urodela Salamanders –tails
Order Anura Frogs and toads –No tail
Order Apoda Caecilians –Legless –Wormlike –Burrowing
Phylum Chordata The phylum Chordata includes fish, amphibians, reptiles, birds, mammals and a few invertebrate classes. They are placed in this phylum.
Phylum Chordata. What Is A Chordate? 4 characteristics present at some stage of life 1.A dorsal, hollow nerve cord (called spinal cord in vertebrates)
Vertebrate Animals (The Animals You’re Most Familiar With)
Phylum Chordata Notochord…flexible rod that gives support during development Usually disappears when backbone develops.
Phylum Chordata. Characteristics At some point in life: – Nerve cord. – Notochord. – Gill slits. – Tail. Bilateral symmetry. Ventral heart.
Vertebrates Invertebrate Chordates and the Origin of Vertebrates Introduction to the Vertebrates Superclass Agnatha: Jawless Fishes Superclass Gnathastomata.
Vertebrates. Vertebrate Characteristics Endoskeleton Vertebrae Integument Gills & Lungs _____________ circulatory system Digestive Tract _____________.
The Vertebrates. Vertebrate Characteristics Vertebrae (backbone) Notochord (flexible dorsal rod) Nerve cord (hollow) with brain Three layers of.
Lecture #14 Phylum Chordata: The vertebrate Phylum.
Chordates (Chap 27). Kingdom: Animalia Phylum: Chordata (evolved ~535 mya) All chordates have the following features at some point in their life (may.
Chapter 39 Fishes Section 1 Introduction to Vertebrates.
Chordates! Subphylum Urochordata Subphylum Cephalochordata Subphylum Vertebrata (focus)
Ch 39/40 – Fish/Amphibian A. AgnathaD. Anura B. Condrichtheyes E. Urodela C. OsteichthyesF. Apoda Toad D Caecilian F Bass C.
Vertebrates in the Sea & on Land Section Adaptations of Vertebrates 1.Chordates with a backbone Made of vertebra segments Completely replaces the.
Phylum Chordata Phylum: Chordata. 4 Characteristics of Chordates Defining Characteristics 1 Notochord. Found under the nerve chord. Runs down the dorsal.
Fish (Subphylum Vertebrata). What is a Fish? They can be roughly defined as: Aquatic vertebrates. Possess scales. Possess fins. Maintain pharyngeal gills.
Introduction to Phylum Chordata Includes 3 subphylum: 1)Urochordata, the tunicates 2)Cephalochordata, the lancelets 3)Vertebrata, the vertebrates.
Fish & Amphibian Jeopardy Fish GeneralFish Classification.
Chordates! Subphylum Urochordata Subphylum Cephalochordata Subphylum Vertebrata!
Derived Vertebrate Characteristics: Backbone, segmental – (usually surrounding/protecting dorsal nerve cord Skull.
Phylum Chordata. Section 30-1 Nonvertebrate chordates Fishes Amphibians Reptiles Birds Mammals Invertebrate ancestor Chordate Cladogram.
The Deuterostomes Embryonic blastopore becomes the anus. Three body layers. True coelom. Dorsal nerve cord.
Phylum Chordata The Vertebrates. The Phylum Chordata Includes: 1.Subphylum Cephalochordata (=lancelets) 2.Subphylum Urochordata (= tunicates) 3.Subphylum.
ABBOTTSCOLLEGE 1 Page 81. CHORDATES Animals that have a backbone Most advanced type of animal.
Kingdom Animalia Phylum Chordata “Vertebrates”. Phylum Chordata “Vertebrates Organisms in this phylum are segmented animals with four distinctive features.
Vertebrates: Part I Fishes & Amphibians. Phylum Chordata Chordates: includes all the vertebrates Have 3 common characteristics: –Nerve Cord: hollow tube.
What is fish with out an eye. FSH. History Earliest fish had no jaws and no paired fins-filtered feed 1 st fish bodies covered with bony plates For 100.
Packet #78 Chapter #34. Introduction All vertebrates are Found within Phylum Chordata; Subphylum Vertebrata Deuterostomes Coelomates Bilateral symmetrical.
Nonvertebrate Chordates, Fishes, and Amphibians Chapter 30.
Vertebrates. Which of these is most closely related to you?
The Chordates Also Known As… Animals With Some Real Spine!
Vertebrates b Phylum: Chordata b Subphylum: Vertebrata.
Phylum Chordata (The Chordates). What is a chordate? Classification: Kingdom Animalia, Phylum Chordata Four Phylum Characteristics Notochord: supportive.
Phylum Chordata. Characteristics of Chordates ► Notochord ► Dorsal nerve cord ► Pharyngeal pouches or gill slits ► Postanal tail.
FISH (and chordates). What is a chordate? Members of the ANIMAL KINGDOM and the PHYLUM CHORDATA They have a dorsal, hollow nerve cord and a notocord Most.
Includes all vertebrates and two groups of invertebrates Have four characteristics during some stage of their life; Notochord Dorsal nerve chord.
Chapter 34 Notes Vertebrate Evolution and Diversity.
AMPHIBIANS. What is an amphibian? Vertebrate Leads a “double life” Moist skin Metamorphosis.
General Zoology Unit Five. Eukaryotic, eumetazoans, deuterostomes Triploblastic, eucoelomates Worm like body divided into three segments Bilaterally symmetrical.
Chordates. What is a Chordate? Chordates are animals that are characterized by a notochord, a dorsal hollow nerve chord, and pharyngeal slits at some.
Marine Fishes Read Chapter 9 Pages Chordates All chordates have (at least during some period of their life) –Dorsal nerve cord –Gill slits.
Chapter 18 – Fishes Lionfish (Pterois). Phylum Chordata Bilateral Bilateral Notocord – rod of cartilage, it forms the spine in some – (2) Notocord – rod.
Copyright © 2005 Pearson Education, Inc. Publishing as Benjamin Cummings PowerPoint Lectures for Biology: Concepts and Connections, Fifth Edition – Campbell,
Chordata. Phylum Chordata Bilateral, Deuterostomate development Notochord Dorsal hollow nerve cord Pharyngeal slits Muscular Post-anal tail Segmented.
The Evolution of Vertebrate Diversity Chapter
INVERTEBRATE CHORDATES (NO BACKBONES) VERTEBRATE CHORDATES (HAVE BACKBONES) PHYLUM CHORDATA.
Phylum: Chordata Vertebrates Fish and Amphibians.
Sharks, skates and rays Placoid scales Ampullary organs Chondrichthyes.
FISH (and chordates). What is a chordate? Members of the ANIMAL KINGDOM and the PHYLUM CHORDATA They have a dorsal, hollow nerve cord and a notocord.
WARM UP What are the four characteristics all chordates share? Draw a sketch of a lancelet, tadpole larva, or fish. Label the four characteristics you.
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