Ortopla iarbasalis Walker

Behounek, G., Han, H. L. & Kononenko, V. S., 2013, Revision of the genus Ortopla Walker, [1859] with description of two new species from Southeast Asia (Lepidoptera, Noctuidae, Pantheinae). Revision of Pantheinae, contribution X, Zootaxa 3746 (2), pp. 240-256: 242-243

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Ortopla iarbasalis Walker


Ortopla iarbasalis Walker  , [1859] 1858

(Figs 1–3, 16 – 20, 36, 37, 46)

Ortopla iarbasalis Walker  , [1859] 1858, List of the Specimens of lepidopterous Insects in the Collection of the British Museum 16: 157. Type-locality: Borneo: Sarawak. Lectotype: male, OUMNH, Oxford, designated (as type) by Swinhoe, 1900, Catalogue of Eastern and Australian Lepidoptera Heterocera  in the collection of the Oxford University Museum 2: 122.

Oromena reliquenda  [sic!] sensu Moore, 1882, Lepidopterous Insects from the Collection of the Late Mr W.S. Atkinson: 160 (Type locality: [ India, Prov. West Bengal], Darjiling, female, NKM (MNHU), Berlin)—misidentification of Ortopla iarbasalis  .

Oromena commutanda Warren, 1891  , syn. nov. Annals and Magazine of Natural History (6) 7: 426, unnecessary replacement name for Oromena relinquenda sensu Moore. Note. The  name Oromena commutanda  was proposed as replacement name (Warren 1891) for misidentification of Ortopla iarbasalis  as “ Oromena reliquenda  ” by Moore (1882).

References: Warren 1891: 464 ( Oromena commutanda  ); Holloway 1976: 32; 2009: 8, Pl. 1, Pl. 9 (larva), male genit. fig. 4; female genit. fig. 12 ( Ortopla iarbasalis  ); Poole 1989: 745 ( Ortopla iarbasalis  , Ortopla commutanda  ).

Material examined. Specimen, misidentified by Moore (1882) as O. relinquenda  , female, [ INDIA] Darjeeling, Coll. Atkinson // Oromena reliquenda Walk.  , female // Ortopla commutanda det  / M. Gaede // genitalia slide GB (NKM [MNHU]). 1 female ,, [ INDIA] Darjeeling, female // BMNH 1505. (NHM [BMNH]); THAILAND: 1 male, Prov. Chiang Mai, Sansai, unknown collector leg., 17.ix. 1985, slide 7327 male (GB/ZSM); NEPAL: 1 female, Buri Gandaki, Arugat, 550 m, Fibiger M. leg., 28, vi. 1998, slide GB 12015 female (ZMUC); MALAYSIA, BORNEO: 1 male, 1 female, Prov. Sabah, Ranau, 500 m, 05° 58 ’N, 116 ° 40 ’E, Provera leg., 2.iv. 1983, slides GB 12055 male, 12059 female (AZ); 1 male, Prov. Sabah, Trus Madi, 1150–1200 m, Martini K. leg., 20.iii.– 8.iv. 2005, slide 12031 male, Ident No. BC ZSM Lep 58646 male (WS); 1 male. Sabah, Mount Kinabalu, 1600 m, Provera leg., 31.iii. 1983 (AZ); 1 male, Prov. Sabah, Kalanggaan, 1400 m, Mt. Kinabalu, 05° 50 ’N, 116 ° 16 ’E, Mey W. & G. Ebert, leg., 9.– 13.vii. 2005, slide GB 12045 male, Ident No. BC ZSM Lep 58647 (NKM [MNHU]); INDONESIA, SUMATRA: 1 male, Prov. Deli, Dolok Merangir, 150–180 m, 02° 40 ’N, 99 ° 30 ’E, Diehl E. W. leg., 2.ix.– 3.xii. 1969, slide ZSM N 4154 (ZSM); PHILIPPINES, PALAWAN: 1 male; 2 females, Mt. Lohawagan, Brooke P., 600–900 m, Brechlin R. ex coll., 15.– 26.xi. 1998, slide 7328 male (GB/ZSM); 1 male, Mt. Matalingahan, 688–800 m, 08° 48 ’N, 117 ° 14 ’E, Schaarschmidt M. leg., 2.xii. 2000, slide GB 1206, male, slide GB 12062 male, Ident No. BC ZSM Lep 58648 (ZFMK); 4 males, Mainit Brook’s Point, 600–900 m, 10 °00’N 119 °00’E, Bal leg. ex coll. Brechlin R., 15–26.xi. 1998, slide: 8063 male (GB/ZSM).

Diagnosis. Adult (Figs 1–3, 16 – 20). This species and O. lindsayi  are sister species, characterised by having huge upcurved male palps, an angled costal extension of forewing in the male, a similar structure of the male genitalia with the horizontal position of the valva, and by the female genitalia. They differ however in size, shape of costal extension, detail of wing pattern of male and female, and proportions and details of male and female genitalia. Wingspan: male 45–60 mm, female 50–52 mm. Antennae of male strongly fasciculate, densely ciliated. Labial palps of male extremely large, upcurved, extended over head; 3 rd segment very large, almost equal to 2 nd in length, covered by long reddish-brown hair-like scales; palps of female approximately same size as in male, covered with short grey and white scales, tip of segments bordered with white. Head, tegulae and patagia yellowish-brown, thorax dorsally covered with yellowish brown scales forming small thoracic crest. Abdomen covered with yellow-brownish scales, forming small crest. Male forewing with prominent angled excavate costal extension in central part. Wing colour ochre-brown with dark elements of wing pattern and yellowish-brown pale elements; antemedial line thin, brown with whitish bordering, slightly waved; veins, especially in subterminal field, pale brown. Hindwing brownish-yellow in basal part, with broad brown terminal field and curved subterminal band. Female forewing pattern differs by presence of white or pinkish-white elements formed by bordering of subbasal, antemedial and submedial lines and whitish dusting; pale veins not as distinct as in male. Male genitalia. ( Figs 36, 37View FIGURES 32 – 37). Uncus relatively short, basally wide, tapered, pointed and hook-like angled apically; scaphium massive, heavily sclerotised, extended and terminated in a circular excavation apically; juxta shield-like; valva lying horizontally, simple, with parallel margins, slightly curved medially, rounded apically; aedeagus with tubular vesica extended basally, tapered apically, with slightly sclerotised patch medially. Female genitalia. ( Fig. 46View FIGURES 46 – 53) Apophyses anteriores and posteriores thin, almost equal in length; antrum membranous, elongate funnel-like; ductus bursae relatively wide, with bulla in joining with corpus bursae; corpus bursae sack-like, membranous.

Distribution. North India (West Bengal), Nepal (Annapurna Himal), Thailand (Provinces Chiang Mai, Phrae, Peninsula Malakka), Malaysia, Borneo (Prov. Sabah), Indonesia (Sumatra), Philippines (Isl. Palawan). The species occurs in forested areas at elevation 500–2600 m. Flight period from March to December. Larvae feed on Trichilia connaroides  ( Meliaceae  ) (Holloway 2009).