Trochactaeon from Russbach, Austria
From collection Fossil collection by Lukas Wallentin
Trochactaeon fossil cross-section
This specimen is a fossilized gastropod of the genus Trochactaeon, originating from the Gosau Group in Russbach, Austria. One side of the specimen has been polished to reveal a clear transverse cross-section of the internal spiral structure (whorls). The shell material appears as light cream to tan calcified lines, while the internal chambers are filled with a dark gray to black, fine-grained sedimentary matrix. This contrast highlights the logarithmic growth pattern of the snail. The reverse side, shown in the second image, remains unpolished and displays a rough, weathered surface with irregular shell fragments and matrix. The overall shape of the piece is discoidal due to the sectioning, though the original shell would have been globose or conical.
Trochactaeon sp.
Heterobranchia
Cretaceous
85.00 Mio. Jahre
Russbach am Paß Gschütt, Austria
Gosau Formation
Good
One side is polished to a high sheen to reveal internal anatomy; the other side is left in its natural state.
Russbach
Austria
Upper Cretaceous
View of the polished side showing the internal spiral whorls of the Trochactaeon shell.
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection