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(Ehrenberg)

Cephalis spherical, with a prominent, 3-bladed apical horn. Thorax campanulate, inflated. Abdomen cylindrical, with a slight medial constriction; peristome differentiated, toothed. Pores on post-cephalic segments circular, regularly arranged. Total shell height (without horn): 150-200 µm.

Ref.: Petrushevskaya (1971a).

Theocorythium trachelium