Figure 66: Septal and chomatal "pores" in Triticites plummeri, Graham Fm., Texas, Permian. Transmitted light micrographs.
A: subaxial section; B: details in equatorial section. Both pore-like features have nothing in common with true pores. Septal pores are tiny multiple foramina. The nature of chomatal pores, a wall texture particular to fusulinids, is not understood at present.
c: choma; c*p: chomatal "pores"; kth: keriotheka; sp: septal "pores". t: tunnel; te: tectum.