1. 
   Eospirifer
   Eospirifer is a genus of extinct brachiopod in the class Rhynchonellata (Articulata) and the order Spiriferida. Their fossils occur most commonly in marine calcareous, microbialitic mudstones with extensive mudcracks or shelly packstones, generally mid-Silurian to early-Devonian in age. ==Select sp...
   Found op http://en.wikipedia.org/wiki/Eospirifer
   
   
2. 
   Eospirifer
   genus of extinct brachiopods, or lamp shells, found as fossils in Middle Silurian to Lower Devonian marine rocks (the Silurian Period ended and the ...
   Found op http://www.britannica.com/eb/a-z/e/35
   
   

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