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†Geczyceras Martinez Gutierrez 1992
urn:lsid:organismnames.com:name:1247050
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65
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†Geczyceras Martinez Gutierrez 1992
Martinez Gutierrez 1992. [Hammatoceratinae (Ammonitina) of the Upper Toarcian and Aalenian in the Iberian Cordillera.] Editorial de la Universidad Complutense de Madrid, Madrid., 1992: i-vii, 1-331