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Living Fossils
Jürgen Solis Ruiz2º Bachillerato A-DLaude El Altillo School
Outline
What are living fossils?
Examples
Summary
Questions
Animals Plants
What are living fossils?
• Informal term.• Living species similar to fossils.• Survivors.• A wide taxon in the past.• Only one alive.• Bacteria, plants, animals and fungi.
Examples
Plants
Plants
• Cycads
• Metasequoias
• Araucarias
Cycads
• Early Permian (299-251).• Trunk, crown and cone.• No fruit.• Evergreen.• Extinction.• Decorative.
Cycads
Cycads
Metasequoias
Metasequoias
• Late Cretaceous (70)• Dawn redwood.• Deciduous.• Cones.• Smallest.• Extinction.
Metasequoias
Metasequoias
Araucarias
Araucarias
Araucarias
• Jurassic (250-200).• Monkey-puzzle tree.• Evergreen.• No flowers.• Vulnerable• Uses
Araucarias
Animals
Animals
• Monito del monte• Hoatzin• Horseshoe crab• Coelacanth• Nautilus• Velvet worm
Monito del monte
• Oligocene (23).• Mammal.• Central Chile.• Insects, invertebrates, fruit.• Nests made with bamboo.• Hibernates.• Reproduces in spring.
Monito del monte
Monito del monte
Hoatzin
Hoatzin
• No date. First feather birds.• Bird.• Amazon and Orinoco.• Leaves and fruits.• Stinkbird.• Claws.• Guyana.
Hoatzin
Horseshoe crab
Horseshoe crab
• Ordovician(488-433)• Arthropod.• Asia and America.• Omnivorous.• Tail to flip.• Shores for mating.
Horseshoe crab
Coelacanth
Coelacanth
• Devonian (416-360).• Fish.• Indian Ocean.• Shallow water fish.• Caves at 100-500 metres.• Ovoviviparous.
Coelacanth
Nautilus
Nautilus
• Triassic (225).• Cephalopod.• Indo-Pacific.• Fish, shrimps and crustaceans.• 300 metres.• Withdraw.
Nautilus
VIDEO
Velvet worm
Velvet worm
• Eocene (40).• Panarthropod (Ecdysozoa).• Central America.• Invertebrates.• Sense of perception.• Secrete sticky substance.
Velvet worm
VIDEO
Summary
Summary
• Informal term.• Survivors.• Not very evolved.• All kind of living beings.• Many in danger of extinction.
• Living fossils refer to:a) Plants.b) All kind of living beings.c) Sea creatures.
• Metasequoias were discovered ina) Chinab) Indiac) Thailand
Questions
Questions
• Monitos del monte live:a) In nests made of bamboo.b) On top of trees.c) Inside rock holes
• Hoatzins are the national animal of:a) Surinam.b) Guyana.c) Brazil.
Thank you
very much
foryour
attention!
