Ascocarps in vertical section initially intraepidermal. In immature ascocarps upper wall wider along future line of opening, here comprising hyaline, thin-walled, cylindric, vertically oriented cells inter-mixed with brown, thick-walled, angular cells. In mature ascocarps upper wall mostly 15-20 µm wide, of brown, thick-walled cells, but adjacent to ascocarp opening 30-50 µm wide, and here comprising cylindric, thin-walled, pale brown cells. Lower wall 15 µm wide, of dark brown, thick-walled, angular cells.

Paraphyses 2 µm diam., swollen to 3.5-5 µm diam. at clavate apex, extending 10-20 µm beyond asci. Asci 100-135 x 9-11 µm, clavate, tapering to small, truncate apex, wall not thickened, 8-spored, ascospores confined to upper half of ascus. Ascospores 34-52 x 2-2.5 µm, tapering to base, 0 septate, with gelatinous sheath.

ETYMOLOGY: mangatepopense; refers to type locality.

NOTES: L. mangatepopense is similar to L. irregulare in macroscopic appearance of its ascocarps, in appearance in vertical section of the upper ascocarp wall, and in the way the ascocarp opening develops. The two species are easily distinguished by ascus and ascospore size, and by the shape of the paraphyses.

L. mangatepopense could equally as well be placed in the genus Coccomyces as currently delimited; Lophodermium and Coccomyces being distinguished on the basis of ascocarp shape alone.