PLACENTICERAS Fielding Bradford Meek, 1870 fósil

PLACENTICERAS  Fielding Bradford Meek, 1870 fósil 

FOTOS - PHOTOS

https://www.google.es/search?hl=es&gs_rn=0&gs_ri=hp&cp=13&gs_id=3&xhr=t&q=placenticeras&bpcl=39314241&biw=994&bih=612&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=Dbe8UJe1B6SJ4ATS8YDQBw

WEB DE INTERÉS

http://en.wikipedia.org/wiki/Placenticeras