References
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- Brehm's . 1916 . Tierleben , xiii ( 4 ) : 273 – 273 .
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- Adametz and Niezabitowski . 1914 . Bull. Intern. Ac. Polon. Sci. (B. II) , 1914 : 764 – 764 . Taf. lii.–liii.The most recent account is by Wodzicki (l. c. 1933, pp. 89–106, pl. vi.).
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- 1927 . Jahrb. Preuss. Geol. Landesanst. , xlviii : 468 – 468 .
- 1930 . Palæobiologica , iii : 94 – 102 . Taf. xii.