Trachydomia nodosa (Meek & Worthen, 1860)
PMH-1, Javorniški Rovt, the western Southern Karavanks.
Trogkofel Formation (upper part)/Goggau Limestone?
Back-reef or back-bank lagoon with well-lit, well-agitated shallow water indicated by dasyclads and Osagid grains.
Specimen in abapertural and oblique apical views displaying smooth subsutural ramp and surface ornamented with nodes. The nodes are more pronounced at the top of the outer whorl face (shoulder) and get progressively weaker toward the base.