Description. The 1-2 µm uniformly thin galleries of this trace are usually found collapsed to the cast surface and overlying other traces, and thereby only apparently form curled carpets or dense networks (Fig. 4G-H). The galleries rarely bifurcate and the individual galleries can often be followed for long stretches of more than 100 µm.

Diagnosis – (Emended after translation from the original German; after Radtke, 91, p. 72.) Thin, branched or unbranched, slightly curved to vermiform boring lying beneath the substrate’s surface. Tiering may or may not occur.
Description – Multitiered, multibranched, complex network system having straight to slightly curved, thin tubules with average diameter of 116 μm. The total length of the network system is 3·5 mm with a thickness of 900 μm. Branching nodes do not show sign of swelling. Constriction is sporadic and only occurs close to the branching nodes.