AMONG MY TRILOBITES

THE SILURIAN

The Silurian period, named for the Silures mountains in Wales, lasted from 441 to 413 million years ago.  Fish shared the trilobites’ world as did Eurypterids and extensive coral reefs formed.  Plants began to invade the land.


TO LEARN MORE ABOUT EACH ORDER OF TRILOBITES, CLICK ON
IT'S NAME.  THIS WILL TAKE YOU TO SAM GON'S WEBSITE FOR A
DESCRIPTION.  USE YOUR BROWSER'S BACK BUTTON TO RETURN
TO THIS PAGE.
PHACOPIDA ORDER

Suborder: Calymenina


Family: Calymenidae
  

3 cm  Illinois

  

 2.6 cm  Arnheim formation;  Mt. Orab, Ohio

   

2.5cm  Waldron Shale formation; St. Paul, Indiana

   

5.6cm  Henryhouse formation; Arbuckle Mountains, Oklahoma

1.7cm  Henryhouse Formation:  Carter County,  Oklahoma


 
 

Suborder: Cheirurina


Family: Encrinuronidae
 

 4cm Xiushan formation; Szechuan Province, China

 

2cm  Xuishan formation; Shandong Province, China

3.9cm  China






Suborder: Phacopina


Family: Dalmanitidae

7.6cm Rochester shale; Middleport, New York




LICHIDA ORDER

Superfamily: Lichoidea
Family: Lichidae

10cm  Rochester Shale Formation;  Middleport, New York

Superfamily: Odontopleuroidea
Family: Odontopleuridae
  

 1.4cm  Cotton Hill Quarry; Forbes NSW, Australia 

9mm Kapaninske Formation, Kosov, Czech Republic






CORYNEXOCHIDA ORDER

Suborder: Illaenina


Family:  Illaenidae

1.7cm  Rochester shale;  Lockport, New York



PROETIDAORDER

Superfamily: Aulacopleuroidea

1cm  Rochester Shale; Middleport, New York


8mm Litenske Formation, Lodenice, Czech Republic



EURYPTERID

(not a trilobite, but a contemporary arthropod)

5.3cm Fiddlers Green formation;  Herkimer County, New York



 

To see the  Home Page

To see the   Cambrian Period Part 1: Agnostida and Redlichiida

To see the   Cambrian Period Part 2: Ptychopariida

To see the   Cambrian Period Part 3:  Asaphida, Corynexochida and Friends
To see the   Ordovician Period Part 1 Asaphida
To see the    Ordovician Period Part 2  Lichida, Phacopida, Corynexochida,  Ptychoparidia and Proetida
To see the   Devonian Period Part 1 : Lichida, Corynexochida, Proetida and Harpetida
To see the   Devonian Period Part 2:  Phacopida.
To see the   Carboniferous Period, the Permian Period, some Trilo-trivia and Links