Dolgoma xanthoma N. Singh, Kirti, Datta & Volynkin, 2019

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 : 36-37

Dolgoma xanthoma N. Singh, Kirti, Datta & Volynkin , sp. nov.

( Figs 7–9 , 35 , 51 )

urn:lsid:zoobank.org:act:B35DD365-5A48-451B-8A89-4AFD250B527E

Type material. Holotype ( Figs 7 , 35 ), ♂, India, Uttarakhand, Dhanaulti , 11.vi.2009, leg. Rahul Joshi (Coll. NZC- ZSI).

Paratypes. INDIA, UTTARAKHAND: 1 ♂, India, Uttarakhand, Dhanaulti , 11.vi.2009, leg. Rahul Joshi (Coll. NZCZSI) ; PAKISTAN: 1 ♂, 3 ♀, Pakistan, Kashmir, Himalaya Mts. , 30 km N Murree, Ayubia , 73°24’03’’E, 34°01’75’’N, 2650m, 5–6.VII.1998, leg. G. Csorba & L. Ronkay, slides ZSM Arct. 2019- 329♂, ZSM Arct. 2019 - 330♀ Volynkin (Coll. MWM /ZSM) ; 2 ♂, Pakistan, Himalaya Mts., Kaghan valley , Tathabaya , 2300m, 73°27’01’’E, 34°36’48’’N, 22–23.VII.1998, leg. G. Csorba & L. Ronkay (Coll. MWM /ZSM) ; 1 ♂, Pakistan, Himalaya Mts., Kaghan valley , Tathabaya , 2200m, 73°26’E, 34°36’N, 07.VII.1998, leg. G. Csorba & L. Ronkay (Coll. MWM / ZSM) .

Diagnosis. Dolgoma xanthoma , sp. nov. is a closest relative of D. xanthocraspis , from which it differs externally by its narrower forewing and the presence of a diffuse transverse line on forewing (that is absent in D. xanthocraspis ). In the male genitalia, D. xanthoma , sp. nov. differs from D. xanthocraspis by its uncus being slightly broader medially, broader apex of distal saccular process densely covered by much longer and more robust setae, and stronger spinules on the medial lateral diverticulum of vesica. The female genitalia of D. xanthoma sp. nov. are very similar to those of D. xanthocraspis , but can be distinguished by the 7 th sternite being strongly connected to 8 th abdominal segment and forming sclerotized folds lateral to the ostium bursae (those are absent in D. xanthocraspis ), longer sclerotized area of the posterior section of corpus bursae, larger signum bursae, and distal section of appendix bursae being more broadened distally.

Description. Adult. Forewing length 13.5– 14 mm in males and 15.5– 16 mm in females. Head with frons and vertex pale yellow. Antennae simple, covered with pale yellow scales dorso-ventrally. Labial palpi porrect, covered with pale yellow scales. Proboscis coiled, long. Thorax with patagia and tegula pale yellow-brown. Forewing pale yellow, irrorated with fewer scales forming small spots; a diffused transverse line acutely angled below lower angle of cell, underside with central area fuscous. Hindwing pale yellowish white with small, androconial patch at costa in middle. Legs pale fuscous. Abdomen yellowish white; anal tuft prominent. Male genitalia with uncus long and broader medially, sclerotized, dorsally bulged out before apex, apical spine present; tegumen longer than uncus, inverted V-shaped, weakly sclerotized; vinculum shorter than tegumen. Valvae with distal costal process triangular approximately; saccular margin bulged out near middle, distal saccular process smaller than distal costal process, forming large bulb like structure, densely covered by much longer and more robust setae. Aedeagus slightly curved; vesica with a field of spinules on the medial lateral diverticulum and a patch of scobination. Female genitalia. Papilla analis trapezoidal. Apophyses anteriores and posteriores long, thin, of equal length. 7 th abdominal sternite strongly connected to 8 th abdominal segment and forms sclerotized folds lateral to the ostium bursae. Ostium bursae moderately broad, round. Antrum short, moderately sclerotized, slightly narrowed posteriorly. Posterior section of corpus bursae narrowed, slightly curved, evenly weakly sclerotized. Anterior section of corpus bursae elliptical, weakly granulated posteriorly, with an elliptical weakly dentate signum medio-posteriorly. Appendix bursae situated postero-laterally at right side, its basal section narrowed, weakly sclerotized and granulated. Distal section of appendix bursae weakly granulated, bilobate, its inner lobe short and round, outer lobe elongated, slightly broadened distally.

Distribution. The new species is known from North India (Uttarakhand) and North-East Pakistan (Azad Kashmir).

Etymology. The specific epithet is derived from the genus name Dolgoma and the new species’ closest relative D. xanthocraspis .

Figures

FIGURES 1–8. Dolgoma spp., adults. 1, D. reticulata, ♂, NE India, Sikkim (©NHMUK); 2, D. reticulata, syntype ♀, NE In- dia, Darjeeling (©NHMUK); 3, D. reticulata, ♂, NE India, Sikkim (CKC); 4, D. reticulata, ♀, NE India, Sikkim (CKC); 5, D. xanthocraspis, ♂, NE India, Sikkim (©NHMUK); 6, D. xanthocraspis, holotype ♀, NE India, Darjeeling (©NHMUK); 7, D. xanthoma, holotype ♂, N India, Uttarakhand (NZCZSI); 8, D. xanthoma, paratype ♂, NE Pakistan (MWM/ZSM).

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.