Classification of the genus Ulminium
G. †Ulminium Unger 1842
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†Ulminium artabeae Brea 1998
†Ulminium atlanticum Romero 1970
†Ulminium chubutense Brea 1995
†Ulminium diluviale Unger 1842
†Ulminium mucilaginosum Brea 1998
†Ulminium mulleri Page 1967
†Ulminium pattersonensis Page 1967