Thiallela, Walker, 1863

Yang, Linlin & Ren, Yingdang, 2018, Two new species, one unrecorded species, and one newly reported male of genus Thiallela Walker, 1863 from China (Lepidoptera: Pyralidae: Phycitinae), Zootaxa 4387 (3), pp. 436-450 : 439

Key to species of Thiallela based on adult

1. Postmedial line white................................................................................. 2

- Postmedial line black................................................................................. 4

2. Two discal spots fused, crescent-shaped................................................................... 3

- Two discal spots separated (Li & Ren 2006, Fig. 3).................................................. T. hiranoi

3. Forewings with a narrow white line edged along dorsal 2/5 of antemedial line (Li & Ren 2006, Fig. 2 )......... T. platantra

- Forewings with a small white dot bordering antemedial line and adjacent to dorsal margin (Li & Ren 2006, Fig. 1 ) T. naevilla

4. Male flagellum with basal segments dilated, has a small notch near base......................................... 5

- Male flagellum simple, simple, basal segments not dilated, without notch........................................ 6

5. Male flagellum with first five segments dilated, sixth segment distinctly notched; forewing yellowish ocherous in basal major- ity region ( Fig. 2 ).......................................................................... T. epicrociella

- Male flagellum with first three segments slightly dilated, fourth to sixth segments distinctly notched; forewing grayish yellow in basal majority region (Fig. 5)....................................................... T. sulciflagella sp. nov.

6. Forewing diffused lots of grayish white scales near antemedial line in basal region, antemedial line arched (Fig. 3) T. ligeralis

- Forewing without grayish white scales in basal region, antemedial line sinuate (Fig. 4)............. T. celadontis sp. nov.

Figures

FIGURE 1. Distribution of Chinese Thiallela spp. □ T.epicrociella; ■ T. hiranoi; ○ T.ligeralis; ● T. naevilla; A T. celadontis sp. nov.; ▲T. platantra; ◊ T.sulciflagella sp. nov.

FIGURES 2¯5. Adults of Thiallela spp. 2, T. epicrociella, ♂, 2a, head, ♂; 3, T. ligeralis, ♂, 3a, head, ♂; 4, T. celadontis sp. nov., holotype, ♂, 4a, head, paratype, ♂; 5, T. sulciflagella sp. nov., holotype, ♂, 5a, head, paratype, ♂ (2¯5 scales = 2.0 mm; 2a¯5a scales = 0.5 mm).