Dolgoma angulifera ( Felder, 1874 )

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 : 37-39

Dolgoma angulifera ( Felder, 1874)

( Figs 10–12 , 36 , 52 )

Lithosia angulifera Felder, 1874 , in: Felder & Rogenhofer, Reise österreichischen Fregatte Novara (Zool.) 2 (Abt. 2) (5): pl. 106, fig. 12 (Type locality: [N India, Himachal Pradesh, NE of Simla] “Himalaya”).

Type material examined. Holotype ♀ ( Fig. 10 ), handwritten label “ NE of Simla ” [NW India, Himachal Pradesh] / handwritten label “344 Lithosia Himalaya ” / handwritten label “ Lithosia angulifera N.” / printed label “arculifera” / printed round label “Felder Colln.” / printed label “ Rothschild Bequest B.M. 1939-I ” / printed round label with red circle “ Type ” / printed label with QR-code “NHMUK010401771” (Coll. NHMUK).

Other material examined. JAMMU & KASHMIR: 2 ♂, India, Jammu & Kashmir, Patnitop , 20.vii.2009, leg. Rahul Joshi (Coll. NZCZSI) ; 1 ♀, India, Jammu & Kashmir, Patnitop , 21.vii.2009, leg. Rahul Joshi (Coll. NZC- ZSI) ; 1 ♀, India, Jammu & Kashmir, Patnitop , 21.vii.2009, leg. Rahul Joshi (Coll. NZCZSI) ; WEST BENGAL: 1 ♂, Darjeeling , Aug. 1904 / Rothschild Bequest B.M. 1939-I, slide NHMUK 01031526 Volynkin ( NHMUK) ; SIK- KIM: 1 ♀, Sikkim, O. Möller / Collectio H. J. Elwes / Rothschild Bequest B.M. 1939-I, slide NHMUK 01031527 Volynkin ( NHMUK) .

Diagnosis. Forewing length is 13–13.5 mm in males and 13–15 mm in females. Externally, D. angulifera is different from other relatives by its orange brown forewing with a well-developed, fuscous transverse line being strongly V-like angled on the cell, with smoothed right angle before costal margin, and perpendicular to the costal edge. Among Indian species, the male genital capsule of D. angulifera most resembles that of D. reticulata , but differs clearly by its broader uncus, much broader tuba analis, shorter valva with more rounded apex, shorter distal saccular process with a smaller and more densely setose tip. Compared to that of D. reticulata , the aedeagus of D. angulifera is much broader and shorter, the vesica is much broader, the lateral diverticulum is broader and has a field of smaller spinules, and the distal diverticulum being much larger and fish bubble-like (that is hook-like curved in D. reticulata ). The female genitalia of D. angulifera are characterized by the broader and asymmetrically sclerotized antrum, the lateral sclerotization of the posterior section of corpus bursae, the presence of two signa in corpus bursae and the small appendix bursae.

Distribution. The species is known from India (Jammu & Kashmir, Himachal Pradesh and West Bengal) and Thailand ( Moore 1878; Černý & Pinratana 2009).

Figures

FIGURES 9–16. Dolgoma spp., adults. 9, D. xanthoma, paratype ♀, NE Pakistan (MWM/ZSM); 10, D. angulifera, holotype ♀, N E of Simla [NW India, Himachal Pradesh] (©NHMUK); 11, D. angulifera, ♂, NE India, Darjeeling (©NHMUK); 12, D. angulifera, ♀, NE India, Sikkim (©NHMUK); 13, D. recta, holotype ♂, Central Thailand (©NHMUK); 14, D. recta, paratype ♀, Central Thailand (CKC); 15, D. recta, ♂, NE India (NZCZSI); 16, D. recta, ♂, Bhutan (CKC).

FIGURES 33–36. Dolgoma spp., male genitalia. 33, D. reticulata, NE India, Sikkim, slide AV4742 Volynkin; 34, D. xanthocraspis, NE India, Sikkim, slide NHMUK010315254 Volynkin (©NHMUK); 35, D. xanthoma, holotype, N India, 36, D. angulifera, NE India, slide NHMUK010315249 Volynkin (©NHMUK).

FIGURES 49–53. Dolgoma spp., female genitalia. 49, D. reticulata, NE India, slide AV4743 Volynkin; 50, D. xanthocraspis, NE India, slide NHMUK010315255Volynkin (©NHMUK); 51, D. xanthoma, paratype, NE Pakistan, slide ZSM Arct. 2019- 330 Volynkin; 52, D. angulifera, NE India, slide NHMUK010315250Volynkin (©NHMUK); 53, D. recta, N. Thailand, slide AV4737 Volynkin.