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 male genitalia

1. Lateral lobes of juxta obviously longer than apical process of gnathos........................................... 3

- Lateral lobes of juxta not longer than apical process of gnathos................................................ 4

2. Transtilla with middle area of posterior margin protruded in hillock shape, posterolateral processes narrowed and elongate (Li & Ren 2006, Fig. 5)........................................................................... T. naevilla

- Transtilla with middle area of posterior margin short-fingerlike protruded, posterolateral processes short and broad (Li & Ren 2006, Fig. 6 )............................................................................... T. platantra

3. Apical process of gnathos trapezoidal ( Yamanaka 2002, Fig. 4)......................................... T. hiranoi

- Apical process of gnathos tapered or spatulate............................................................. 5

4. Clasper extending to or near end of sacculus............................................................... 6

- Clasper extending beyond end of sacculus................................................................ 7

5. Apical process of gnathos spatulate; posterolateral processes of transtilla triangular ( Fig. 9 )............... T. epicrociella

- Apical process of gnathos tapered; posterolateral processes of transtilla auriform, bent inwardly ( Fig. 11 ).................................................................................................... T. celadontis sp. nov.

6. Clasper not inflated ventroapically, without small spine dorsoapically; aedeagus with two clubbed cornuti (Fig. 10).................................................................................................... T. ligeralis

- Clasper slightly inflated ventroapically, with a small spine dorsoapically; aedeagus with numerous small, conical thorn-like and five horn-like cornuti (Fig. 12)..................................................... T. sulciflagella sp. nov.

Figures

FIGURES 6¯8. Types of Thiallela ligeralis. 6, labeled Myelois ligeralis Walker, holotype, ♂; 7, labeled Thiallela signifera Walker, type, ♂; 8, labeled Luconia pallidobasella Ragonot, type, ♂ (scales = 2.0 mm).

FIGURES 11¯12. Male genitalia of Thiallela spp. 11, T. celadontis sp. nov., paratype, slide No. YLL15178; 12, T. sulciflagella sp. nov., paratype, slide No. YLL15196 (scales = 0.5 mm).

FIGURES9¯10. Male genitalia of Thiallela spp. 9, T. epicrociella, slide No. YLL15185; 10, T.ligeralis, slide No. LHX14112 (scales = 0.5 mm).