†Mactra (Spisula) pittsburgensis frustra Tegland 1933 (clam)
Bivalvia - Cardiida - Mactridae
Alternative combination: Spisula pittsburgensis frustra
Full reference: N. M. Tegland. 1933. The fauna of the type Blakeley Upper Oligocene of Washington. University of California Publications Bulletin of the Department of Geological Sciences 23(3):81-174
Belongs to Mactra (Spisula) pittsburgensis according to J. W. Durham 1944
Sister taxa: none
Type specimen: UCMP 32197
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Oligocene of United States (2: Washington collections)
Total: 2 collections each including a single occurrence