Bradina ternifolia Guo & Du, 2023

Guo, Jia-Ming & Du, Xi-Cui, 2023, Five new species of Bradina Lederer (Lepidoptera, Crambidae) from China, with remarks on the morphology of the genus, ZooKeys 1158, pp. 49-67 : 49

Bradina ternifolia Guo & Du sp. nov.

Figs 2H , 5G-K

Type material.

Holotype, ♂ China: Yunnan Prov., Dahaoping Village, Tengchong City, 25°02'N, 98°49'E, 6 August 2007, Dan-Dan Zhang leg., genitalia slide no. GJM21173. Paratypes. China: Yunnan Prov., 2 ♂♂, 7 ♀♀, other same data as holotype, genitalia slide no.: GJM21174 ♂, GJM21175 ♂, GJM21176 ♀, GJM21177 ♀, GJM21178 ♀, GJM21181 ♀; 2 ♀♀, 5 August 2007, other same data as holotype.

Diagnosis.

This species is similar to B. translinealis . It can be distinguished by postmedial line of forewing straight; valva elongated and narrowed comparatively, sacculus with long setal cluster near middle, posterior phallus with three long leaf-like cornuti; antrum membranous. In B. translinealis , postmedial line of forewing slightly excurved near costa; sacculus has no setal cluster, phallus has one fusiform cornutus medially and two lamellar cornuti posteriorly; antrum broader and sclerotized.

Description.

Adult (Fig. 2H ). Wingspan 31.0-33.0 mm, forewing length 15.0-16.0 mm. Frons brown, except black-brown above. Vertex yellowish white mixed with brownish yellow. Antenna pale yellow, with pale brown ring dorsally; ventral cilia c. half-length of flagellomeres diameter of male. Labial palpus with basal half yellowish white, brown or black-brown distally. Maxillary palpus brown or black-brown. Patagium and tegula dark brown. Thorax dark brown dorsally, white ventrally. Wings brown, stigmata and lines black-brown. Forewing black-brown along costa; discoidal stigma reniform; postmedial line at c. two thirds of wing, straight and nearly parallel to terminal margin. Hindwing with discoidal stigma crescent; postmedial line beyond basal half of wing, usually inconspicuous. Cilia pale brown on forewing, greyish white on hindwing, a darker line at base. Legs pale yellow. Front and middle tibiae brown; hind tibia with outer middle spurs c. three fifths length of inner spurs. Abdomen dark brown dorsally, each segment pale terminally; slightly pale ventrally.

Male genitalia (Fig. 5G, H ). Valva gradually narrowed and bearing dense long setae distally; costa arched near base and accompanied by a cluster of short and curved setae; sacculus gradually narrowed to apex, with a cluster of long setae near middle. Posterior phallus inflated slightly, with three long leaf-like cornuti tapered apically.

Female genitalia (Fig. 5I-K ). Antrum membranous. Ductus bursae slender, adjoined posteriorly by crescent colliculum laterally, then inflated and bent. Corpus bursae nearly oval, with dense tiny spines inside, transverse signum crescent and densely spinose.

Etymology.

The specific name is derived from the Latin ternifolius (meaning 'trifoliate'), in reference to three long leaf-like cornuti.

Distribution.

China (Yunnan).

Remark.

Coremata of some male individuals of this species were protruded out of the body, forming a cluster of white hairs at the end of the abdomen.

Figures

Figure 2. Habitus of Bradina species, male A B. megesalis B B. fusoidea sp. nov., holotype C B. spirella sp. nov., holotype D B. torsiva sp. nov., holotype E B. subpurpurescens F B. falciculata sp. nov., holotype G B. translinealis H B. ternifolia sp. nov., holotype. Scale bars: 0.5 cm.

Figure 5. Genitalia of Bradina species A-F B. translinealis A-C male, slide no. GJM 21165 D-F female, slide no. GJM 21167 G-K B. ternifolia sp. nov. G, H male, holotype, slide no. GJM 21173 I-K female, paratype, slide no. GJM 21178 B, C, H partial enlargement of phallus E, J partial enlargement of ductus bursae F, K signum. Scale bars: 0.2 mm (B, C, F, K); 0.5 mm (A, E, G, H, J); 1.0 mm (D, I).