Classification of the genus Avellana
G. †Avellana d'Orbigny 1842
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†Avellana buechneri Choffat 1888
†Avellana elongata Gueranger 1867
†Avellana mathewsonii Gabb 1864
†Avellana subcrassata d'Orbigny 1850
†Cinulia (Avellana) serrata Guembel 1861