Diacria erythra Van der Spoel, 1971a forma crassa Van der Spoel, 1971a
Synonyms
Diacria quadridentata erythra n. subsp. forma crassa n. forma Van der Spoel, 1971a: 7
Diacria quadridentata part Rampal, 1973a: 517
Diacria erythra crassa Leyen and Van der Spoel, 1982: 102
Yaron (1978) is of the opinion that the present form and the type forma are synonymous or that both populations are continuous. However, this suggests separation of formae.