Promalactis lateridentalis Wang, 2020

Wang, Shuxia & Liu, Chen, 2020, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) IX. The maculosa species-group, with descriptions of eighteen new species, Zootaxa 4890 (1), pp. 38-66 : 42

Promalactis lateridentalis Wang , sp. nov.

( Figs 3 , 21 )

Type material. CHINA, Yunnan: Holotype ♂, Yexianggu (22.17°N, 100.87°E), Xishuangbanna, 762 m, 10.VII.2015, leg. KJ Teng et al., slide No. JYY17706.

Diagnosis. The new species can be distinguished from its congeners in the male genitalia by each lateral arm of the juxta having a melanic tooth at outer margin, and the sacculus with distal 1/3 produced to a lanceolate free process. It is similar to P. dilatignatha Wang et Li, 2004 in male genitalia, but it can be distinguished by the costa lacking a process, and the aedeagus with a spine-shaped cornutus; in P. dilatignatha , the costa has a papillary process, and the cornutus has several apical spines ( Wang & Li 2004: 5, fig. 10).

Description. Adult ( Fig. 3 ). Wingspan 10.0 mm. Head brownish grey, with snowy white scales laterally. Labial palpus with second segment black on outer surface, dark brown on inner surface; third segment black except white apically. Antenna with scape dirty white on dorsal surface, black on ventral surface; flagellum black, annulated with white on dorsal surface. Thorax and tegula dark brown on basal half, ochreous yellow on distal half. Forewing ochreous yellow; markings white bordered by black scales: costal spot at distal 2/5, its inner side with a large yellowish brown patch mixed with black scales; cell with a rounded spot at basal 1/3 and a small rounded spot below costal spot at anterior angle; fold with a small spot at base and a larger spot above distal 2/5; dorsum with four spots almost evenly spaced to before tornus; apical spot oval; two terminal spots smaller; tornus with diffused blackish brown scales and a few white scales; cilia ochreous yellow. Hindwing and cilia grey. Fore- and midlegs with femora greyish black ventrally, pale grey dorsally, tibiae and tarsi black, tibiae with a white spot basally and medially, with a tuft of white scales apically, tarsi white at apices of basal two tarsomeres; hindleg yellowish brown ventrally, black dorsally except tarsus white at apices of basal two and fourth tarsomeres as well as on entire apical tarsomere.

Male genitalia ( Fig. 21 ). Uncus conical, narrowly truncate at apex. Gnathos as long as uncus; mesial plate with basal 2/3 parallel, thereafter widened to obtuse apex, with scale-like protuberances; basal arm half length of mesial plate. Tegumen divided from about posterior 1/2; lateral arm abruptly narrowed to apex distally. Valva subrectangular, bilobed distally: dorsal lobe longer, digitate, with dense setae, ventral lobe very short, sub-triangular; costa widened and smoothly arched medially, concave distally; sacculus narrowed to beyond basal 2/3, distal 1/3 produced to a lanceolate free process pointed dorsad. Saccus sub-triangular, rounded on anterior margin. Juxta with strong lateral arm apically reaching posterior margin of tegumen, with a melanic tooth at outer margin of each arm, tooth of left arm further from apex; basal lobe uniformly slender. Aedeagus straight, longer than valva; cornutus a spine about 1/7 length of aedeagus.

Female unknown

Distribution. China (Yunnan).

Etymology. The specific epithet of the new species is derived from the Latin later- and dentalis, referring to the tooth at the outer margin of the juxta lateral arm.

Figures

FIGURES 1‒6. Adults of Promalactis spp. 1, P. coloristigmosa, paratype, ♂; 2, P. cruciate, holotype, ♂; 3, P. lateridentalis, holotype, ♂; 4, P. latispinata, holotype, ♂; 5, P. lonchodes, holotype, ♂; 6, P. magnispina, holotype, ♂. Scales = 2 mm.

FIGURES 19‒24. Male genitalia of Promalactis spp. 19, P. coloristigmosa, holotype, slide No. JYY17711, 19a, enlarged cornu- tus, slide No. JYY17804; 20, P. cruciate, holotype, slide No. HXM14127; 21, P. lateridentalis, holotype, slide No. JYY17706; 22, P. latispinata, holotype, slide No. LC19215, 22a, enlarged cornutus; 23, P. lonchodes, holotype, slide No. JYY17733, 23a, enlarged cornutus, slide No. JYY17725; 24, P. magnispina, holotype, slide No. JYY17718. Scales = 0.2 mm.