Promalactis apicidigitata Wang, 2019

Wang, Shuxia & Jia, Yanyan, 2019, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) IV. The sakaiella species group, with descriptions of fifteen new species, Zootaxa 4563 (3), pp. 491-515 : 492-494

Promalactis apicidigitata Wang , sp. nov.

( Figs 1 , 17 , 32 )

Type material. CHINA , Yunnan Province: Holotype ♂, Qiunatong Village (28.10°N, 98.57°E), Bingzhongluo Town, Gongshan County, Nujiang, 1767 m, 14.VI.2017, coll. Kaijian Teng et al, slide No. JYY17558. Paratypes (8♂, 7♀): 1♂, Nankang Management Station, Baoshan , 2009 m, 18.VII.2015, coll. Kaijian Teng and Xia Bai ; 6♂, 5♀, Mt. Weibao, Dali, 2205 m, 30.VII–3.VIII.2014, coll. Kaijian Teng, Wei Guan, Xiuchun Wang and Shurong Liu, slide Nos. HXM14143 ♂, JYY17174 ♂, HXM14161 ♂, JYY17140 ♂, JYY17139 ♀, HXM14162 ♀, JYY17155 ♀; 2♀, Mt. Weibao, Dali , 2244 m, 21‒22.VII.2013, coll., Shurong Liu, Yuqi Wang and Kaijian Teng, slide Nos. HXM13174, HXM13157 ; 1♂, Wenquan, Kunming , 1900 m, 30.VIII.2005, coll. Yingdang Ren, slide No. W05042 .

Diagnosis. This new species can be distinguished from all the other described species of the sakaiella species group by the valva having a digitate apical process and the sacculus extended to a digitate distal process that bears a spine in the male genitalia. It is similar to P. campanulata sp. nov. in the male genitalia, and differences between them are stated in the diagnosis of the latter species.

Description. Adult ( Fig. 1 ) wingspan 9.5 mm– 10.5 mm. Head with vertex yellowish white, frons brown, occiput dark ocherous brown. Labial palpus with first segment blackish brown; second segment orange yellow on inner surface, pale ocherous brown on outer surface; third segment black except white at base, shorter than second segment. Antenna with scape white; flagellum white annulated with blackish brown. Thorax dark ocherous brown. Forewing ground color orange yellow, tinged with black scales, becoming ocherous brown medially; basal fascia rust brown, with two parallel white lines: basal line running from costal margin obliquely outward to dorsum, another one along outer margin of basal fascia, both lines edged with black scales along their inner margins; costal spot white, rounded, extending to above lower corner of cell, mixed with black scales on inner margin; dorsal spot silvery grey edged with black scales, extending from before end of fold straightly to above fold, then curved outward and horizontally narrowed to lower margin of costal spot; distal patch black mixed with grey, narrowed and diffused to tornus along termen; cilia orange yellow except deep grey along distal part of costal margin and around tornus. Hindwing and cilia grey. Fore- and midlegs black on ventral side, greyish or creamy white on dorsal side except white at apices of tibia and each tarsomere; hindleg whitish yellow on ventral side, greyish brown on dorsal side.

Male genitalia ( Fig. 17 ). Uncus with basal half subparallel laterally, distal half distinctly narrowed to pointed apex, lined with setae medially on lateral margin. Gnathos heavily sclerotized, curved; lateral arms broad, ribbonlike. Tegumen divided from posterior 2/5, narrowed anteriorly. Valva rectangular, slightly widened and setose distally; apex slightly produced dorsoapically, with a short spine ventroapically, with a large digitate process arising from middle. Sacculus narrow, ribbon-like, almost uniform throughout, produced to a digitate distal process slightly exceeding apex of valva ventrally. Saccus slender, about 2 times length of uncus. Juxta being a large circle formed by a wide ribbon. Aedeagus straight, slightly dilated basally and distally, uniform medially; cornutus consisting of two large spines slightly different in size, about 1/4 to 1/3 length of aedeagus.

Female genitalia ( Fig. 32 ). Apophyses slender, apophyses anteriores about same length as apophyses posteriores. Lamella postvaginalis flabellate, setose. Antrum large, heavily sclerotized, wide posteriorly, narrowed at middle, concave at posterior margin. Ductus bursae membranous, enlarged basally, with a large sclerite and two rows of strong spines. Corpus bursae ovate; signum absent.

Distribution. China (Yunnan).

Etymology. This epithet is from the Latin apic- and digitatus, referring the the digitate apical process of the valva.

Figures

FIGURES 1–4. Adults of Promalactis spp. 1. P. apicidigitata sp. nov., holotype, ♂; 2. P. biprocessa sp. nov., holotype, ♂; 3. P. bicornea sp. nov., holotype, ♂; 4. P. cribrata sp. nov., holotype, ♂. Scales =1.0 mm

FIGURES 17–20. Male genitalia of Promalactis spp. 17. P. apicidigitata sp. nov., holotype, slide No. JYY17558; 18. P. campanulata sp. nov., holotype, slide No. DZH11040; 19. P. tibetica sp. nov., holotype, slide No. JYY17326; 20. P. subquadrata sp. nov., holotype, slide No. JYY17553. Scales =0.2 mm.

FIGURES 32‒36. Female genitalia of Promalactis spp. 32. P. apicidigitata sp. nov., paratype, slide No. JYY17155; 33. P. tibetica sp. nov., paratype, slide No. JYY17568; 34. P. auremacularis sp. nov., paratype, slide No. MNHU-NK042; 35. P. curvitaeniata sp. nov., paratype, slide No. DZH11053; 36. P. lvovskyi sp. nov., paratype, slide No. TLMF-NK002. Scales =0.2 mm (not available for No. 34).