Figure 74: Parachomata in Pseudodoliolina sp. from a commercial thin section labeled "Moscow", Permian.
A: oblique section at low angle to axis of coiling (arrow). B: oblique section nearly perpendicular to the axis of coiling.
c*: choma; f: foramina forming a single row in alternation with the parachomata; s: septum (without fluting); spth: spirotheca (no trace of keriotheca).