Eoophyla tenuisa, Chen & Wu, 2019

Chen, Fuqiang & Wu, Chunsheng, 2019, A taxonomic review of the genus Eoophyla Swinhoe, 1900 (Lepidoptera: Crambidae: Acentropinae) from China, Zoological Systematics 44 (3), pp. 212-239 : 220

Eoophyla tenuisa sp. nov. ( Figs 8–9 , 16–17 )

Diagnosis. The new species is very similar to E. sejunctalis , but can be easily distinguished by having three strong specialized setae in valva and two pairs of signa in female, while the latter has two setae in male and one pair of signa in female.

Moreover, the new species is also similar to E. menglensis . The main different in external is that the latter has the postmedial band of forewing with obviously broader fuscous outer edge, about 1/2 to 1/3 of the postmedial band. In this species, the ground color of both wings is little yellower than E. menglensis , and the androconial hairs is little larger than E. menglensis . In male genitalia, the new species has the uncus slenderer than E. menglensis , and has 3 strong specialized setae rather than 2 setae in the latter. In female genitalia, the new species has the basal pair of signa obvious longer than E. menglensis .

Description. Wing span ♂ 18–21 mm (n = 4), ♀ 16–25 mm (n = 18). Head pale yellow; antennae filiform, base with a side projection present in male; labial palpi upturned, as long as compound eyes, densely suffused with long scales in ventral. Thorax and abdomen pale yellow. Legs and tarsi slender.

Male. Forewing pale yellow; costa with basal half yellow; upper edge of cell diffused with fuscous long setae on basal half and androconial hairs covered with apical 2/5 of cell from upper edge; a longitudinal fascia arising along inner margin; a triangular pale yellow patch beyond discocellulares, with outer edge fuscous, slightly bended; postmedial fascia pale yellow, with fuscous outer edge, touched with triangular patch beyond discocellulares; submarginal fascia band-like, pale yellow, with fuscous edges on both sides; cilia fuscous. Hindwing pale yellow; basal area white; antemedial fascia pale yellow, with fuscous outer edge; postmeidal fascia pale yellow, with fuscous edges on both sides; an incision present below apex; four eyespots present along outer margin, with silvery scales in lateral; submarginal fascia pale yellow, without obvious darker edges; cilia fuscous. Female same with male except androconial hairs absent.

Male genitalia ( Fig. 16 ). Uncus slender, with pointed apex; gnathos little broader than uncus, about 5/6 length of uncus, apex with dorsal teeth; tegumen with sclerotized dorsal ridge X-shaped; valva densely coved with setae, nearly same width from base to apex, three strong specialized setae present at apex, about 5/7 length of valva, third seta with minute spines laterally and a knife-shaped apex; vinculum broad; saccus round; juxta plate-like, with apex bilobed; aedeagus slender, vesica with many minute spines, ductus ejaculatorius arising from middle.

Female genitalia ( Fig. 17 ). Anal papillae relatively broad, densely covered with setae; apophysis anterioris and posterioris near same length, about 1.3 times as long as anal papillae; antrum elongated; collar sclerotized; ductus seminalis arising below collar; doctus bursae about 1/3 length of corpus bursae, with minute spines; corpus bursae membranous, with two pairs of signa present, consisting of many minute spines; shorter pair present at base, about 1/5 length of corpus bursae; longer pair present at middle, about half length of corpus bursae.

Material examined. Holotype (♂). Yunnan, Xishuangbanna, Menglun, 650 m, 1964.IV.15, Zhang Baolin. Paratypes. Yunnan, Yiwubana, Menglun , 650 m, 2♂ 9♀, 1964.IV.13–V.9, Zhang Baolin; Yunnan, Menglun , 650 m, 1♀, 1962.V.7, Song Shimei; Yunnan, Menglun , 4♀, 1980.V.6, Wang Linyao; Yunnan, Menglun , 1♀, 1982.VII.11, Song Shimei; Yunnan, Yiwu , 800–1000 m, 1♀, 1958.X.26, Pu Fuji; Yunnan, Cangyuan , 1♂ 1♀, 1980.V.21, Song Shimei; Yunnan, Jinghong , 1♀, 1982.IV.12, Song Shimei. All deposited in IZCAS.

Distribution. China (Yunnan).

Etymology. The specific name is from the Latin “ tenuis ”, corresponding to its tenuous outer edge of the postmedial band.

Remarks. The species E. sejunctalis ( Snellen, 1876) was firstly recorded in Hainan ( Li & An, 1995), then in Guangxi, Yunan Provinces ( Li, You & Wang, 2003). By partly rechecking the materials from NKU and contrasting the redescription of Yoshiyasu (1987), we doubt that the “ E. sejunctalis ” from China should be the misidentification of the new species named here.

Figures

Figures 2–9. Adults of Eoophyla spp. 2. E. conjunctalis (Wileman & South, 1917), male. 3. Ditto, female. 4. E. halialis (Walker, 1859), male. 5. Ditto, female. 6. E. melanops (Hampson, 1896), male. 7. Ditto, female. 8. E. tenuisa sp. nov., male. 9. Ditto, female.

Figures 10–17. Genitalia of Eoophyla spp. 10. E. conjunctalis (Wilemuan & South, 1917), male. 11. Ditto, female. 12. E. halialis (Walker, 1859), male. 13. Ditto, female. 14. E. melanops (Hampson, 1896), male. 15. Ditto, female. 16. E. tenuisa sp. nov., male. 17. Ditto, female. Scale bars=1mm.