Doryscus geiseri, Lee, Chi-Feng, 2017

Lee, Chi-Feng, 2017, Revision of the genus Doryscus Jacoby (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 4269 (1), pp. 1-43 : 18

Key to the Doryscus species of China, South India, Peninular Malaysia, Laos, Singapore, Taiwan, Thailand, and Vietnam

Color variability of Doryscus chujoi Kimoto from Taiwan and D. geiseri sp. nov. in Singapore is not considered in this key.

1. Erect setae on elytra long ( Figs 1 A–1D)...................................................................2

- Erect setae on elytra short ( Fig. 1 E)...................................................................... 4

2. Vertex black or with black spots.........................................................................3

- Lacking blacks areas on vertex ( Fig. 4 A)............................................... D. indochinensis sp. nov.

3. Elytra basally and apically darkened ( Fig. 4 B); antennomere I swollen in some males ( Fig. 5 A), IV–XI stout (length to width ratios smaller than 3.6)................................................................... D. krausi sp. nov.

- Elytra entirely yellowish brown ( Fig. 1 F); antennomere I normal in males ( Fig. 3 A), IV–XI elongate (length to width ratios bigger than 4.0)........................................................................ D. geiseri sp. nov.

4. Punctures on elytra coarse; antennae stout ( Fig. 4 C), length to width ratios of antennomeres IV to XI less than 3.0 ( Figs 7 A– 7B).................................................................................. D. kubani sp. nov.

- Punctures on elytra fine; antenna slender, length to width ratios of antennomeres IV to XI more than 3.0................5

5. Erect setae on elytra sparse; elytra sometimes black at least at margins ( Figs 4 D–4F)........ D. varians (Gressitt & Kimoto)

- Erect setae on elytra dense; elytra entirely yellowish brown ( Fig. 1 A).............................. D. chujoi Kimoto

Figures

FIGURE 1. Habitus of Doryscus species, dorsal view. 1 A. D. chujoi Takizawa; 1 B. D. chujoi Takizawa, color variation; 1 C. D. chujoi Takizawa, color variation; 1 D. D. chujoi Takizawa, color variation; 1 E. D. geiseri Lee, sp. nov.; 1 F. D. geiseri Lee, sp. nov., color variation.

FIGURE 3. Diagnostic characters of Doryscus geiseri Lee, sp. nov. 3 A. Antenna, male; 3 B. Antenna, female; 3 C. Penis, dorsal view; 3 D. Penis, lateral view; 3 E. Gonocoxae; 3 F. Abdominal ventrite VIII. 3 G. Apical margin of abdominal ventrite V, male; 3 H. Apical margin of abdominal ventrite V, female; 3 I. Spermatheca.

FIGURE 4. Habitus of Doryscus species, dorsal view. 4 A. D. indochinensis Lee, sp. nov.; 4 B. D. krausi Lee, sp. nov.; 4 C. D. kubani Lee, sp. nov.; 4 D. D. varians Gressitt & Kimoto; 4 E. D. varians Gressitt & Kimoto, color variation; 4 F. D. varians Gressitt & Kimoto, color variation.

FIGURE 5. Diagnostic characters of Doryscus indochinensis Lee, sp. nov. 5 A. Antenna, male; 5 B. Antenna, female; 5 C. Penis, dorsal view; 5 D. Penis, lateral view; 5 E. Gonocoxae; 5 F. Abdominal ventrite VIII. 5 G. Apical margin of abdominal ventrite V, male; 5 H. Apical margin of abdominal ventrite V, female; 5 I. Spermatheca.

FIGURE 7. Diagnostic characters of Doryscus kubani Lee, sp. nov. 7 A. Antenna, male; 7 B. Antenna, female; 7 C. Penis, dorsal view; 7 D. Penis, lateral view; 7 E. Gonocoxae; 7 F. Abdominal ventrite VIII. 7 G. Apical margin of abdominal ventrite V, male; 7 H. Apical margin of abdominal ventrite V, female; 7 I. Spermatheca.