Siccia usambara, Volynkin, 2023

Volynkin, Anton V., 2023, Contribution to the knowledge of the genus Siccia Walker (= Aemene Walker, syn. n.) in the Afrotropics with descriptions of seventy-three new species, three new subspecies, and a check-list of Asiatic taxa of the genus (Lepidoptera: Erebidae: Arctiinae: Lithosiini), Ecologica Montenegrina 64, pp. 1-184 : 33

The S. usambara species-group

Diagnosis. In the male genital structure, the only known species of the group is reminiscent of the S. taprobanis and S. caffra species-groups due to the bilobate cucullus, the presence of the distal saccular process and the robust cornuti in the vesica. However, the spinulose costal lobe distinguishes it from both the groups which have a smooth costal lobe. The phallus of S. usambara is distally dilated whereas it is narrowly cylindrical in the S. taprobanis and the S. caffra species-groups. The female genitalia of the S. usambara species-group is similar to those of the S. caffra species-group.