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05.03 Origin and Evolution Of life

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Mariana Mejia

on 10 June 2015

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Transcript of 05.03 Origin and Evolution Of life

Welcome to this part of the tour that are going to give information about a special animal in the mesozoic era, This animal is the Temnospondyli, so enjoy in this amazing stop.
We are going to leave a comic video about the mesozoic era
05.03 Origin and Evolution of Life
Stops
Introduction
biological evolution and phylogeny
physical characteristics
related organisms, past and present, if available
locations where found
Classification
Evolution History
Reproduction
Growth
Conclusion
biological evolution and phylogeny

The biological evolution of the Temnospondyli is that diversify and settle in a wide range of habitats in aquatic and semi-aquatic and terrestrial areas.
The phylogeny of the Temnospondyli is that have similar appearance with the mammal, reptile.
physical characteristics

Temnospondyls are much larger than living amphibians

Most have broad, flat heads that are either blunt or elongated

The skulls are rounded or triangular in shape when viewed
from above, and are usually covered in pits and ridges.

Many temnospondyls also have canal-like grooves in their skulls called sensory sulci .

Most temnospondyls have small limbs with four toes on each front foot and five on each hind foot.
related organisms,
In the past, the animal Mastodonsaurus, was similar for the way that is his cranium, also the labyrinthodontes
In the present, the salamanders and iguana, have similar they body, but the majority of retir have something similar with the Temnospondyli
locations where found
In the present, many fossil have been found on every continent, for example from Greenland to the Antarctic Continent.
In the past they habit many part of the earth, adapting in areas like fresh water, terrestrial, and even coastal marine environments.
Classification
Cyclotosaurus, a stereospondyl
Sclerothorax, a basal limnarchian
Zygosaurus, a euskelian
This is some animal that form part of his classification
Evolution History
Temnospondyls first appeared in the Early Carboniferous around 330 million years ago (Mya).

Many derived temnospondyls as the amphibamids,

Increasing aridity and the diversification of reptiles contributed into a decline in terrestrial temnospondyls.

As temnospondyls continued to flourish and diversify in the Late Permian (260.4 - 251.0 Mya)
rEPRODUCTION
Temnospondyls, like all amphibians, reproduced in aquatic environments.

Most temnospondyls probably reproduced through external fertilization.

The fossils consist of small disks with thin membranes that are probably vitelline membranes

One temnospondyl may have brooded young in an area between the gills called the pharyngeal pouch.
Growth
While most types of temnospondyls are distinguished on the basis of features in mature specimens

Temnospondyl larvae are often distinguished by poorly developed bones.

Temnospondyls like Sclerocephalus are known from both large adult specimens and small larvae

The Branchiosauridae is known from larval specimens
So, this is the end of an amaizing part of ous tour, we spect looking in the next tour, and can know more about Science. Thank you and Good bye
Conclusion
Today, we learn about the Temnospondyli, and how as his life in the past, and how now is his ancest, so this was a grateful adventure.
Full transcript