Promalactis prolixa Kim, 2017

Kim, Sora, Duwal, Ram Keshari, Heppner, John B., Lee, Wonhoon, Bae, Yang-Seop & Lee, Seunghwan, 2017, First record of genus Promalactis Meyrick (Lepidoptera: oecophoridae) from Cambodia with five new species, Journal of Natural History 51 (29 - 30), pp. 1697-1712 : 1706-1708

Promalactis prolixa Kim , sp. nov.

( Figures 1 (A), 2(C), 3(C), 4(C,Ca–d), 5(B,Ba–b))

Diagnosis

This species is externally similar to the Chinese species, P. carinata Du et al 2011 , but it can be easily distinguished by the forewing with white costal patch a large semi-circular, and the male genitalia with a heavily sclerotized gnathos which is downward from base to 1/2 and then upturned from 1/2 to apex; the juxta bear heavily developed and elongated lateral lobes. The female genitalia are also close to those of P. carinata Du et al 2011 , but can be differentiated by a pair of signa, bearing each one spine.

Description

Adult ( Figures 2 (C) and 3(C)). Head: Frons and vertex brown. Antenna with scape white dorsally, pale yellowish brown ventrally, almost same length as diameter of eye; fragellum white and dark brown dorsally; 2nd segment of labial palpus pale yellowish brown ventrally, dark brown dorsally; 3rd segment dark brown except pale yellowish brown at base, shorter than 2nd segment. Thorax: Thorax and tegula dark brown. Wing expanse 7.0– 7.5 mm. Forewing ground colour dark brown; two white bands edged with fuscous scales: subbasal oblique, slightly arched toward wing base, traversed from costal margin to posterior margin near wing base; antemedial oblique, arched towards wing base, broadened at costal margin, gradually narrowed towards posterior margin; costal patch at 2/3, large, semi-circular, reaching beyond half across wing, proceeded by fuscous scales; fuscous suffusion below costal patch before tornus; another suffusion at apex; fringes grayish dark brown, except yellow near apex. Leg: Tibia of hind leg yellowish brown with apical asymmetric spurs, one 1.5 times longer than the other.

Male genitalia ( Figure 4 (B,Ba–b)). Uncus trifurcate, 1/3 length of saccus. Gnathos tougue-shaped, downward from base to 1/2, upward from 1/2 to apex, heavily sclerotized from 1/2 to apex, setose ventrally, as long as uncus. Valva symmetrical; costal margin slightly concave at sub-apex, gradually narrowed to round apex; saccular margin convex at 1/2, gradually narrowed from 1/2 to apex; processus of sacculus elongate, finger-shaped, longer than valva. Juxta with symmetrical, bearing elongated lobes, setose from 1/3 to apex, longer than valva, dense hairs at apex. Saccus wide at base, elongated, as same length as lobe of juxta. Aedeagus straight, same length as the valva plus saccus, with apical cornutus, 1/14 length of aedeagus.

Female genitalia ( Figure 5 (B,Ba–b)). Papilla anales setose, same length as apophyses anteriores. Apophyses posteriores longer than apophyses anteriores. Caudal margin of lamella antevaginalis flattened, dense hairs entirely. Ostium funnel-like. Antrum long cylinder-like, wider than that of ductus bursae in width. Ductus bursae slightly longer than antrum. Corpus bursae long-pear shaped bearing a pair of signa, spine-like.

Holotype

Male, Cambodia, Siem Reap Province, Phnom Kulen National Park, 200 m to headquarter, 21.II.2012, RK Duwal, gen. slide no. 9287/ S Kim. Paratype. one male and three females: one female, Cambodia, Pursat Province, Sam kos, 8.II.2014, Bae et al., gen. slide no. 9586/ S Kim; one male, Cambodia, Kampot Province Bokor National Park , 16.I.2013, Bae et al., gen. slide no. 9590/ S Kim; one female, Cambodia, Siem Reap Province, Phnom Kulen National Park , 200 m to headquarter, 21.II.2012, RK Duwal, gen. slide no. 9290/ S Kim; one female, Cambodia, Mondulkiri Province Seima Biodiversity Conservation Area , 1.VII.2011, Bae et al.

Etymology

The specific name of the new species is derived from the Latin, prolixa (=elongate), referring to the elongated lobe of the juxta of male genitalia.

Distribution

Cambodia (Northwest, West, South, East; new).

Remark

The female genitalia of the new species is very close to the that of P. carinata ( Du et al. 2011) , except for small morphological differences. The DNA base-molecular work on sexual matches between these species should be studied further.

Figures

Figure 1. Collection sites of Promalactis in Cambodia. (A) Siem Reap Province, Phnom Kulen National Park; (B) Mondulkiri Province, Seima Biodiversity Conservation Area; (C) Pursat Province, Sam Kos; (D) Kao Koh Province; (E) Kampot Province, Bokor National Park; (F) Kep Province, Kep National Park.

Figure 2. Adult of Promalactis. (A) Promalactis albisquama; (B) P. infundibulina sp. nov.; (C) P. prolixa sp. nov.; (D) P. seimana sp. nov.; (E) P. serratiola; (F) P. spiraliola sp. nov.

Figure 4. Male genitalia of Promalactis. (A) Promalactis albisquama; (Aa) aedeagus of ditto; (Ab) uncus and gnathos of ditto; cucullus and sacculus of ditto; (B) P. infundibulina sp. nov.; (Ba) aedeagus of ditto; (Bb) lateral view of ditto; (C) P. prolixa sp. nov.; (Ca) aedeagus of ditto; (Cb) uncus of ditto; (Cc) gnathos of ditto; (Cd) lobe of juxta of ditto; (D) P. seimana sp. nov.; (Da) aedeagus of ditto; (Db) front view of ditto; (E) P. spiraliola sp. nov.; (Ea) aedeagus of ditto; (Eb) uncus and gnathos of ditto; (Ec) basal part of cornutus of ditto; scale bar, 0.5 mm.

Figure 5. Female genitalia of Promalactis. (A) Promalactis infundibulina sp. nov.; (Aa) spines in corpus bursae of ditto; (B) P. prolixa sp. nov.; (Ba) lamella post-and ante-vaginalis of ditto; (Bb) spines in ductus bursae of ditto; (C) P. serratiola sp. nov.; (Ca) lamella antevaginalis and antrum of ditto; (Cb) spines in ductus bursae of ditto; (D) P. spiraliola sp. nov.; (Da) lamella post-and antevaginalis of ditto; (Db) signa of ditto; scale bar, 0.5 mm.