Authority: Buck, William R. 1987. Bryostephane Steereana: A Collection of Bryological Papers Presented to William Campbell Steere On The Occasion of His 80th Birthday. Mem. New York Bot. Gard. 45: 1-749.
Discussion:One fragment of a leaf, 1.38-1.48 m. The fossU is from the leaf base, but the fragment shows the characteristic cells of Aulacomnium (one large central papilla per cell). The strong and ± bulging comer thickenings are within the variability of A. palustre, hut A. acuminatum (Lindb. & Amell) Lindb. cannot be ruled out.