About this Course
최근 조회 5,744

100% 온라인

지금 바로 시작해 나만의 일정에 따라 학습을 진행하세요.

유동적 마감일

일정에 따라 마감일을 재설정합니다.

완료하는 데 약 9시간 필요

권장: 4 weeks of study, 3-5 hours/week...

영어

자막: 영어, 루마니아어, 독일어

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AnimalMarine BiologyEvolutionPaleontology

100% 온라인

지금 바로 시작해 나만의 일정에 따라 학습을 진행하세요.

유동적 마감일

일정에 따라 마감일을 재설정합니다.

완료하는 데 약 9시간 필요

권장: 4 weeks of study, 3-5 hours/week...

영어

자막: 영어, 루마니아어, 독일어

강의 계획 - 이 강좌에서 배울 내용

1
완료하는 데 3시간 필요

Introduction to Marine Reptiles

Welcome to the first lesson of Palaeontology: Ancient Marine Reptiles. In this lesson we will explore the main theme of the course: the aquatic problem. In other words, what happens when a terrestrial animal returns to the water permanently? How do air-breathing, land-lubbing creatures once again adapt to life in the sea? Life in water is very different than life on land. Water is much denser than air, which affects all aspects of an animal's life including movement, sight, and hearing. In addition, animals that return to the water cannot breathe water, and so must return to the surface for air. Water also conducts heat much better than air, making staying warm and active a challenge. Despite all these obstacles, many land animals have returned to the water throughout the course of evolutionary history. In fact, many examples of them are living today including whales, seals, crocodiles, sea turtles and penguins. Each of these animals had ancestors that returned to the water. The process of overcoming the challenges associated with this transition is what we refer to as the aquatic problem. This lesson will explore many different types of adaptations that modern and extinct animals have evolved to meet these challenges. You will be introduced to some extinct groups of reptiles you have probably never heard of, and will gain a new appreciation for how well suited modern marine animals are to their environment. Just a quick note before you get started: 'Palaios' is the Greek word for 'ancient', so palaeontology or paleontology is the study of ancient life. Both spellings are correct, with palaeontology used in Britain, and paleontology more common in the US.

...
5 videos (Total 80 min), 6 readings, 1 quiz
5개의 동영상
1.2 The Aquatic Problem - Part 220m
1.3 Classifying Aquatic Amniotes22m
6개의 읽기 자료
Instructional Staff10m
Meet Your Presenter: Scott Persons10m
Course Glossary10m
Acknowledgements10m
Interactive Learning Objects10m
Lesson 1 Course Notes10m
1개 연습문제
Module 1 Assessment (Graded)10m
2
완료하는 데 2시간 필요

Ichthyopterygians

Welcome back! We hope that you enjoyed the first lesson of the Ancient Marine Reptiles mini MOOC. In lesson one, we discussed a variety of modern and extinct groups of aquatic amniotes. Some of these groups would have been familiar to you, and some you had probably never heard of before. We also explored some of the many differences between living in water and living on land, and we gave examples of how some amniote groups have overcome these challenging differences. As you may have already seen, some of the solutions to the different aspects of the aquatic problem were solved in the same way by unrelated groups- a phenomenon called convergence. The next three lessons will build on your understanding of the aquatic problem as we investigate it more detail in three extinct groups of marine reptiles: the ichthyopterygians, sauropterygians, and mosasauroids. Each lesson will follow the same general outline. First, we will introduce you to the group and some of its diversity. The second part of each lesson will focus on how that group adapted to solve the aquatic problem, and how this resulted in specializations for feeding, locomotion and reproduction. Finally we will give you an overview of the evolutionary history of the group through time and space, as well as presenting some important fossils and localities from Canada and around the world. In lesson two, we will study the first of the three major groups of extinct marine amniotes: the ichthyopterygians. The ichthyopterygians were highly specialized animals. Most of the later members looked something like a dolphin or a tuna, a great example of convergent evolution. These reptiles were probably among the fastest aquatic creatures that ever lived. They were found all over the world, from the early Triassic to the mid-Cretaceous, a span of 150 million years. By the end of this lesson, you should be familiar with the history and diversity of this group, and be able to appreciate some of their impressive specializations to solve the aquatic problem.

...
4 videos (Total 82 min), 1 reading, 1 quiz
4개의 동영상
2.3 Stratigraphic Record of Ichthyopterygians25m
1개의 읽기 자료
Lesson 2 Course Notes10m
1개 연습문제
Module 2 Assessment (Graded)10m
3
완료하는 데 2시간 필요

Sauropterygians

Welcome back! We hope you enjoyed the lesson on ichthyopterygians, the first of three in depth explorations of an extinct marine reptile group that we will cover. In this lesson you learned that ichthyosaurs are among the most specialized reptiles that ever lived. They had many adaptations to solving the aquatic problem including large eyes for seeing in deep water, powerful tails to power their thunniform swimming, and two sets of flippers for stability and steering. We also discussed the hypothesis that ichthyosaurs may have overcome the problem of being cold-blooded reptiles living in water by evolving some endothermic capabilities. Even though ichthyopterygians were well adapted for a life in the water, this lineage still went extinct long before the End-Cretaceous Mass Extinction for unknown reasons. The lesson you are about to start will follow a similar format to lesson 2, but instead of ichthyopterygians, we will be investigating a second major marine reptile lineage: the sauropterygians. These animals shared the seas with the ichthyosaurs for much of their 180 million year existence. You may already know some of the members of this group such as the long-necked elasmosaurs and the massive-jawed pliosaurs such as Liopleurodon. In this lesson we will expand your knowledge of these animals by introducing you to their lizard-like ancestors and a wider variety of the derived members. We will present you with one of the biggest unsolved mysteries surrounding marine reptiles: how did plesiosaurs use their four massive, wing-like flippers to swim? We will also look at how they ate and reproduced, and we will finish by taking you on a worldwide tour of plesiosaur diversity through time. We hope you enjoy learning about this group of reptiles, who had adaptations so unique that they have never been seen in any other lineage of marine tetrapods.

...
5 videos (Total 88 min), 1 reading, 1 quiz
5개의 동영상
3.2 Sauropterygian Paleobiology - Part 220m
3.3 Stratigraphic Record of Sauropterygians17m
1개의 읽기 자료
Lesson 3 Course Notes10m
1개 연습문제
Module 3 Assessment (Graded)10m
4
완료하는 데 2시간 필요

Mosasauroids

Welcome to the final lesson in Palaeontology: Ancient Marine Reptiles. The lesson you just finished gave you an in depth look at one of the most morphologically disparate groups of marine tetrapods to ever live. There were the turtle-shaped placodonts with crushing teeth; the extraordinarily long-neck elasmosaurs; and the pliosaurs with jaws massive enough to take on nearly any prey. Even though sauropterygians evolved many different body plans, they all shared certain adaptations for solving the aquatic problem such as live birth and appendicular locomotion. In contrast, the final group we will investigate showed convergence on one morphotype. The mosasaurs, though diverse, were all fairly long reptiles, with large jaws, four flippers and a long, lobed tail. You may recognise one of them from Jurassic World, where an enormous genetically-engineered Mosasaurus leaped out of the water to eat a shark. This last lesson will once again start by examining the diversity of the group, from their terrestrial origins to last days of the Cretaceous when they ruled as apex predators. We will investigate the specific adaptations of the group to the aquatic problem, and finish with an overview of the history of mosasaurs throughout time and space. Please enjoy the last lesson of Palaeontology: Ancient Marine Reptiles. It is an appropriate way to finish this course since the mosasaurs were among the largest and most powerful marine predators to ever live, and were the last major marine reptile group to evolve during the Mesozoic.

...
5 videos (Total 94 min), 1 reading, 1 quiz
5개의 동영상
4.2 Mosasauroid Paleobiology - Part 215m
4.3 Stratigraphic Record of Mosasauroids25m
1개의 읽기 자료
Lesson 4 Course Notes10m
1개 연습문제
Module 4 Assessment (Graded)10m
4.8
142개의 리뷰Chevron Right

Paleontology: Ancient Marine Reptiles의 최상위 리뷰

대학: JCApr 2nd 2016

An excellent introduction to the sometimes overlooked marine predators that lived alongside the dinosaurs! A lot of detail is presented here, so be prepared to act like a sponge and soak it all up.

대학: TOJun 21st 2016

I thought this would be a fun simple class, but I DID NOT know anything about marine reptiles, and it showed. I learned a lot and this instruction was very helpful and very educational.

강사

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Michael Caldwell

Professor
Department of Biological Sciences
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Halle P. Street

Sessional Instructor
Faculty of Science

앨버타 대학교 정보

UAlberta is considered among the world’s leading public research- and teaching-intensive universities. As one of Canada’s top universities, we’re known for excellence across the humanities, sciences, creative arts, business, engineering and health sciences....

자주 묻는 질문

  • 강좌에 등록하면 바로 모든 비디오, 테스트 및 프로그래밍 과제(해당하는 경우)에 접근할 수 있습니다. 상호 첨삭 과제는 이 세션이 시작된 경우에만 제출하고 검토할 수 있습니다. 강좌를 구매하지 않고 살펴보기만 하면 특정 과제에 접근하지 못할 수 있습니다.

  • 수료증을 구매하면 성적 평가 과제를 포함한 모든 강좌 자료에 접근할 수 있습니다. 강좌를 완료하면 전자 수료증이 성취도 페이지에 추가되며, 해당 페이지에서 수료증을 인쇄하거나 LinkedIn 프로필에 수료증을 추가할 수 있습니다. 강좌 콘텐츠만 읽고 살펴보려면 해당 강좌를 무료로 청강할 수 있습니다.

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