1. 
   Atrypa
   A·try'pa noun [ New Latin , from Greek 'a priv. + ... a hole.] (Paleon.) A extinct genus of Branchiopoda, very common in Silurian limestones.
   Found op http://www.encyclo.co.uk/webster/A/141
   
   
2. 
   atrypa
   <paleontology> A extinct genus of Branchiopoda, very common in Silurian limestones. ... Origin: NL, fr. Gr. Priv. + a hole. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?atrypa
   
   
3. 
   Atrypa
   • (n.) A extinct genus of Branchiopoda, very common in Silurian limestones.
   Found op http://thinkexist.com/dictionary/meaning/atrypa/
   
   
4. 
   Atrypa
   genus of extinct brachiopods, or lamp shells, that has a broad time range and occurs abundantly as fossils in marine rocks from the Silurian through ...
   Found op http://www.britannica.com/eb/a-z/a/121
   
   
5. 
   Atrypa
   Atrypa also known as lamp shell is an extinct genus of brachiopod that lived from the Late Ordovician (444 million years ago) to the Carboniferous (318 million years ago) and occurs abundantly as fossils in marine rocks. It has a wide distribution on all the continents except Antarctica. The genus ...
   Found op http://en.wikipedia.org/wiki/Atrypa
   
   

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