We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byMorgan Pope
Modified about 1 year ago
Better Terrestrial living – origin of the amniotes Part 7
Amniotes Amphibians 2 terrestrial tetrapod groups
Amniotes reptile/bird, mammal + (many extinct things ) (Lepospondyli) 1.
Temnospondyli 2. Amphibians + (many) extinct things
lobe-fin fish †early tetrapods: labyrinthodonts, ichthyostegans, “fish-o-pods” Lepospondyli, †Anthracosaurs Amnoita Temnospondyli Class Amphibia † various dead ends
not quite amniotes Lepospondyli, †Anthracosaurs
Carboniferous – warm and wet
Carboniferous – “amphibian” paradise
Permian – cooler and drier
Paleozoic is the age of fishes and “amphibians”
Post-Paleozoic is the age of amniotes
Patterns in Skull Evolution
Pre-Amniote /early amniote Captorhinus
Captorhinus aguti Pre-Amniote / early amniote
anapsid Skulls Pre- & early Amniote
Anapsid Pre- & early Amniote Captorhinus aguti jaw muscles
anapsid skull and jaw muscles (beneath skull bones) pre-amniote / early amniote
anapsid skull and jaw muscles pre-amniote Anapsid condition
amniote foramen pre-amniote Anapsid condition Synapsid condition
Proto-mammal Modern mammal
Skull re-arranged to accommodate jaw muscles Old NEW
Anapsid Diapsid Skulls Re-arranged to accommodate jaw muscles
No foramen foramena present diapsid – 2 openings anapsid
Early diapsid Petrolacosaurus
Anapsid Synapsid Skulls Re-arranged to accommodate jaw muscles
No foramen foramen present Synapsid – 1 opening anapsid
Early synapsid Eothyris
Anapsid Diapsid Synapsid
Anapsid Diapsid Synapsid
Anapsid Diapsid Synapsid Amniote ancestor Mammals and ancestors Reptiles, birds, dinosaurs, etc.
Anapsid anamniotes, stem amniotes
Synapsid Modern mammal
orbit fenestra joined with orbit Modern mammal Synapsid
Diapsid tuatara orbit
Diapsid Modern Lizard
Diapsid Modern snake
Diapsid Modern bird orbit
Diapsid Mesozoic reptile orbit
are diapsids with a (secondarily acquired) anapsid skull
Clear proof of diapsids on Mars NASA Photos
As seen on the internet
Moving away from water
Fish Amphibian Amniote
No more gill breathing – even in larvae amphibian larvae
Body covering Dry and dead
Scales …. Not all the same
Scales fish scales = dermal amniote scales = epidermal
Keratin present in anamniotes – but not widely employed
Anamniotes – Positive Pressure Breathing
Amniotes – negative pressure breathing
Amniotes – No more cutaneous respiration
amphibians lungs lungs and gills gills
Circulation lungs amphibiansreptiles lungs and gills
Osmotic balance and waste elimination evolution of kidneys
Lobe fin fish
The big split anapsid anamniote synapsid diapsid
The big split
Higher metabolism More heat generation better respiration better circulation heat conservation / utilization waste heat elimination diet / digestion
What do we do with the heat?
Amphibians & Reptiles Donald Winslow, 7 April 2008 Readings from Hickman, et al., 2008 Ch (amphibians); Ch 26: (reptiles)
Animals Grow and Change by Denise Carroll. What do animals need to live and grow? Fresh air Fresh air Food Food Water Water Shelter Shelter.
Chapter 26 Introduction to Animals. Characteristics of Animals There are 3 general features of animals which all animals share: All animals are multicellular.
VERTEBRATES. YOU MUST KNOW… THE FOUR CHORDATE CHARACTERISTICS TRAITS WHICH DISTINGUISH EACH OF THE FOLLOWING GROUPS: CHONDRICHTHYES, OSTEICHTHYES, AMPHIBIA,
Classification of Animals © Diane Hawkins Graphics by kind permission from PC Advisor - 10,000 Clipart March 1999 Cover CD ROM.
Vertebrates. Characteristics of Vertebrates Vertebrates have a vertebral column and specialized cells that develop from the nerve cord. The vertebral.
Reptiles General Characteristics. Classification Phylum Chordata Phylum Chordata Subphylum Vertebrata Subphylum Vertebrata - Class Reptilia Order Squamata-
A quiz based on the Classification of Vertebrates © Diane Hawkins Graphics by kind permission from PC Advisor - 10,000 Clipart March 1999 Cover CD ROM.
Amphibians Amphibians. What is an amphibian? Amphibians can be defined as vertebrates that are aquatic as larvae and terrestrial as adults, breathe.
How do we classify vertebrates? 1.2. Characteristics of Animals Features that make them different –M–Many cells. –C–Cannot make their own food –C–Can.
Deuterostomes Notochord Dorsal, hollow nerve cord Pharyngeal gill slits Muscular Postanal tail Phylum: Chordata.
Ryan Flurnoy Basilisk Lizard and the Frilled Lizard.
Copyright © 2005 Brooks/Cole Thomson Learning Biology, Seventh Edition Solomon Berg Martin Chapter 20 The Origin and Evolutionary History of Life.
Fishes, Amphibians, and Reptiles What Is a Vertebrate? Fishes Amphibians Reptiles Vertebrate History in Rocks Table of Contents.
Characteristics of Reptiles Reptiles are fully adapted to life on land Reptiles Reptiles and Birds Chapter 29 Characteristics that allow reptiles.
Introduction to Vertebrates. Vertebrate Vocabulary Chapters Chordate 2.vertebrate 3.vertebra (712) 4.agnathan (714) 5.ectothermic (724) 6.endothermic.
Figure 16.1 Early jawless fishes: (a) Sacabambaspis from the Mid Ordovician of Brazil, the oldest well- preserved fish; (b) the osteostracan Hemicyclaspis.
Class Agnatha: Jawless Fishes Lamprey and Hagfish Gills single loop, 2 chambers Unpaired fins, muscles External Fertilization Ectotherms Slimy/mucus-y.
Science – Visual Study Guide Chapter 4 – Lessons 1-4 Mr. Rowe & Ms. Hallock.
Chapter 20-Reptiles 43DD-83E5-F640422CEFB4&blnFromSearch=1&productcode=US.
$20 $30 $40 $50 $10 $20 $30 $40 $50 $10 $20 $30 $40 $50 $10 $20 $30 $40 $50 $10 $20 $30 $40 $50 $10 PlantsAnimalsMineralsRocksFossils.
Vertebrate Classes All in Chordate Phylum 1. All vertebrates have… Bilateral symmetry Bilateral symmetry Fully developed coelom with organs Fully developed.
What are birds ? Birds(class Aves) are feathered, winged, bipedal, endothermic (warm- blooded), egg-laying, vertebrate animals. With around 10,000 living.
By Nicholas and Tre There are five different groups of animals with vertebrates. Mammals Reptiles Fish Amphibians Birds.
Vertebrates. Vertebrates are part of Kingdom Animalia. They are members of the subphylum Vertebrata, which have a backbone or spinal column. There are.
By Victoria Reding. There are five different groups of animals with vertebrates. These classifications are: Mammals Mammals Fish Fish Reptiles Reptiles.
1. Chordate Characteristics Characteristics of Chordates A chordate is an animal that in some stage of development has: 1. Notochord- dorsal rod of specialized.
Diversity of Modern Life Kingdom Monera (Monerans) Smallest and simplest lifeforms Unicellular (one-celled) no nucleus Bacteria and cyanobacteria.
Chordata: Amphibans, Reptiles, and Birds William Ross Jeff.
© 2016 SlidePlayer.com Inc. All rights reserved.