Order Pterioida Newell 1965
Family Myalinidae Frech 1891
Genus Septimyalina Newell 1942

The bivalve Septimyalina perattenuata has been a rare recovery so far. This single specimen is the only example from both localities. I can observe a columnar prismatic layer on this shell, which is hard to photograph using light.

Septimyalina perattenuata from the Pine Creek limestone at SL 6445
Fig. 1.—Septimyalina perattenuata from the Pine Creek limestone at SL 6445. ID: CG-0513. Scale bar = 1 cm.

References