Silurian By: Lindsey Jones, Gabe Hankey, Noah Pung

Silurian period was a time where melting of major glaciers occurred and it caused sea levels to rise. This was a time period where coral reefs made there fist appearance, and the wide and rapid spread of jaw-less fish, and the appearances of both the first known freshwater fish as well as the first fish with jaws. It is also at this time, that our first good evidence of life on land is preserved, such as relatives of spiders and centipedes, and also the earliest fossils of vascular plants.

Gastropods have coiled shells often known as snails, today they live on land freshwater, and in the sea.

Gastropods get food from plants, filtering the water, and some are carnivores which eat other animals.

Some gastropods are scavengers, feeding on dead plant or animal matter; others are predators; some are herbivores, feeding on algae or plant material; and a few species are external or internal parasites of other invertebrates.

The jawless fish internal skeleton is not bony but cartilaginous

The jaw-less fish was one of the most widespread fish of the Silurian.

Instead of a jaw it has an unhinged circular mouth

What Silurian life looked under the water

  • Cooksonia had stems but no leaves.
  • Some had special tissues that carried water and nutrients upwards to the branching parts of the plant. Though vascular tissue in plants is common today, it was a first of that time.

Moss grew on the waters edge, and were the most prominent plant of the time.

A large extinct arthropod which is closely related to crabs and scorpions, are commonly called sea scorpions. The eurypterids were among the largest and most fearsome marine predators of the Paleozoic. They were large arthropods that at the smallest were 10 cm but could grow to be over 6 foot long.
The Eurypterid body parts consist of:

What the land looked like during the Silurian period:

Here is a picture of SIR RODERICK MURCHISOn who was named AFTER AN ANCIENT WELSH CELTIC TRIBE CALLED THE SILURE

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