Dolgoma Moore, 1878

Singh, Navneet, Kirti, Jagbir Singh, Datta, Harvinder Singh, Joshi, Rahul & Volynkin, Anton V., 2019, A review of the genus Dolgoma Moore from India, with notes on the genus taxonomy and descriptions of a new genus, four new species and a new subspecies (Lepidoptera, Erebidae, Arctiinae, Lithosiini), Zootaxa 4683 (1), pp. 33-54 : 34

The genus Dolgoma Moore

Moore, 1878, Proceedings of the Scientific Meetings of the Zoological Society of London, 1878: 20.

Type species: Lithosia reticulata Moore, 1866 (by original designation).

Diagnosis. Dolgoma is a member of the Eilema genus-group. The diagnosis for the genus was provided by Dubatolov & Zolotuhin (2011). In the male genitalia, a combination of features such as an apex of distal saccular process being broadened, heavily sclerotized and armed with spinules (autapomorphy of the genus) and a short and moderately sclerotized vinculum, without coremata is characteristic for the genus. Some species of Teulisna also have setose or even spinulose distal saccular processes, but those are elongated and curved, and their vincula are more or less rectangular, weakly sclerotized and have coremata. In the female genitalia, the presence of a large, sack-like lateral diverticulum of appendix bursae is characteristic.

On the basis of male genitalia, the genus can be sub-divided into three species-groups established below.

The Dolgoma reticulata species-group. The group is characterized by: (1) a robust uncus being broadened medially and having a short claw-like tip; (2) a weakly sclerotized, X-shaped juxta (with apical branches being much shorter than lower ones); (3) an apex of distal saccular process being bulb-like, broadened and densely covered with short and thin spinules.

The Dolgoma steineri species-group. The group is characterized by: (1) a narrow uncus being broadened basally; (2) a weakly sclerotized, pentagonal juxta; (3) a bulb-like, weakly spinulose apex of a distal saccular process having longer base and being well separated from the valva surface.

The Dolgoma recta species-group. The group is characterized by: (1) a short arrowhead-shaped uncus having a longitudinal dorsal crest; (2) broad and heavily sclerotized juxta having broad and rounded lateral lobes and a V-like dorsal process medially; (3) a sacculus being evenly broadened distally with a distal saccular process being pyramidal, heavily sclerotized and armed with several long robust setae on its tip.