Fish fauna from the second middle Devonian bone bed of Central Ohio (Eiffelian)

The Second Bone Bed of central Ohio is the "classic" Middle Devonian bone bed of this region. Two localities were sampled, and a variety of plates, scales and teeth were recovered. The plates and scales were diagnostic to the species level, in constrast to the teeth. Two species of agnathids, OHIOASPIS TUMULOSUS and Q. IMPOSITUS; seven species of acanthodians, CHEIRCANTHOIDES COMPTUS, C. VENUSTUS, C. BREVIPLICATUS, HELOLEPIS BELLARUGOSUS, H. VENUSTILOIDES, ACANTHOIDES? SCIOTOENSIS, A.? DUBLINENSIS; and one species of sarcopterygian ONYCHODUS SIGMOIDES were recovered. The classification scheme followed by Wells (1944b) was chosen for acanthodians over that of Denison (1979). Denison synonymized all the acanthodian scales of CHEIRCANTHOIDES and HELOLEPIS into C. COMPTUS. Examination of Wells' material resulted in no reasonable explanation for this synonymy. Therefore, Wells' 1944b classification was used instead of Denison's 1979 classification scheme