Chilocorus, Leach, 1815

Li, Wenjing, Huo, Lizhi, Wang, Di, Ahrens, Dirk & Wang, Xingmin, 2018, Contribution to the genus Chilocorus Leach, 1815 (Coleoptera: Coccinellidae: Chilocorini), with descriptions of two new species from China, European Journal of Taxonomy 469, pp. 1-34 : 4-5

Key to species of the genus Chilocorus from China

1. Elytra without spots .......................................................................................................................... 2 – Elytra with spots ..............................................................................................................................11

2. Elytra entirely black or outer margin black ...................................................................................... 3 – Elytra entirely red ( Fig. 1a ) ......................................................................... C. politus Mulsant, 1850

3. Elytra entirely black .......................................................................................................................... 4 – Only outer margin of elytra black ..................................................................................................... 7

4. Body round ....................................................................................................................................... 5 – Body heart-shaped ( Fig. 2a ) ....................................................... C. yunlongensis Cao & Xiao, 1984

5. Dorsum without metallic lustre ........................................................................................................ 6 – Dorsum with bluish lustre ( Fig. 3a ) ........................................ C. nigricaeruleus Li & Wang sp. nov.

6. Pronotum mostly black except lateral parts yellow ( Fig. 4c ) ................. C. nigrita ( Fabricius, 1798) – Pronotum black except anterior angles yellow ( Fig. 5c ) .................................. C. melas Weise, 1898

7. Ground colour of elytra red .............................................................................................................. 8 – Ground colour of elytra yellow ....................................................................................................... 10

8. Body roundish.................................................................................................................................... 9 – Body heart-shaped ( Fig. 6a ............................................................................. C. rubidus Hope, 1831

9. Scutellum black ( Fig. 7 a–c); abdominal postcoxal line not reaching posterior margin of abdominal ventrite 1 ( Fig. 7d ) ................................................................................ C. chinensis Miyatake, 1970

– Scutellum red ( Fig. 8 a–c); abdominal postcoxal line reaching posterior margin of abdominal ventrite 1 ( Fig. 8d ) ........................................................................................ C. rufitarsis Motschulsky, 1853

10. Head black, pronotum and outer margin of elytra black with bluish lustre ( Fig. 9 ac) .................................................................................................................... C. hauseri Weise, 1895

– Head and pronotum yellow, outer margin of elytra black without bluish lustre ( Fig. 10 ac) ................................................................................................... C. circumdatus ( Gyllenhal, 1808)

11. Elytra with a pair of spots ............................................................................................................... 12 – Elytra with two or three pairs of spots ............................................................................................ 17

12. Black areas of dorsum with bluish lustre ........................................................................................ 13 – Black areas of dorsum without any metallic lustre ......................................................................... 14

13. Penis guide as long as parameres ( Fig. 11h ) ....................................... C. chalybeatus Gorham, 1892 – Penis guide distinctly shorter than parameres ( Fig. 12g ) ............................. C. shirozui Sasaji, 1968

14. Elytral spots small, apex of penis blunt .......................................................................................... 15 – Elytral spots relatively larger, penis constricted to a pointed tip ( Fig. 13a , e–f) ................................ ........................................................................................................... C. hupehanus Miyatake, 1970

15. Penis and tegmen moderately stout ................................................................................................ 16 – Penis and tegmen strongly stout, penis guide subtriangular, widest at base, gradually converging apically to blunted tip in ventral view ( Fig. 14e, h ) .................... C. strenotubus Li & Wang sp. nov.

16. Penis guide approximately ¾ length of parameres in lateral view, distinctly expanded at basal ¼ in ventral view ( Fig. 15 g–h) ......................................................................... C. kuwanae Silvestri, 1909

– Penis guide approximately 4/5 length of parameres in lateral view, approximately parallel from base to basal ½ ( Fig. 16 g–h) .................................................................................. C. esakii Kamiya, 1959

17. Ground colour of elytra black ......................................................................................................... 18 – Ground colour of elytra brown ....................................................................................................... 19

18. Body length: 3.40–3.70 mm, broadly oval, dorsum with bluish lustre ( Fig. 17a ) .................................................................................................... C. alishanus Sasaji, 1968 – Body length: 4.30–5.30 mm, heart-shaped, dorsum without any metallic lustre ( Fig. 18a ) .............. .................................................................................................................... C. bijugus Mulsant, 1853

19. Body length: 3.33–3.67 mm, elytra dark brown, with three pairs of roundish yellow spots, arranged in a row before centre, penis guide as long as parameres ( Fig. 19a, g ) .............................................. ....................................................................................................... C. bipustulatus ( Linnaeus, 1758)

– Body length: 3.80–4.67 mm, elytra dark brown, with a pair of transverse yellow strips, situated before centre, about ¾ elytra width, penis guide slightly longer than parameres ( Fig. 20a, g ) ........................................................................................................... C. geminus Zaslavskij, 1962

Figures

Fig. 1. Chilocorus politus Mulsant, 1850. a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i–j. Female genitalia. i. Ovipositor. j. Spermatheca. Scale bars: 0.1 mm. (SCAU)

Fig. 2. Chilocorus yunlongensis Cao & Xiao, 1984. a. Dorsal view. b. Penis. c. Tegmen, lateral view. Scale bars: 0.1 mm. (FIQB)

Fig. 3. Chilocorus nigricaeruleus Li & Wang sp. nov., holotype. a. Dorsal view. b. Lateral view. c. Frontal view. d. Prothorax. e. Antenna. f. Maxilla. g. Mandible. h. Labium. i. Front leg. j. Hind leg. k. Tarsal claw. l. Abdomen. m. Penis. n. Apex of penis. o. Tegmen, lateral view. p. Tegmen, ventral view. Scale bars: 0.1 mm. (SCAU (E) 11287)

Fig. 4. Chilocorus nigrita (Fabricius, 1798). a. Dorsal view. b. Lateral view. c. Frontal view. d.Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i. ovipositor. Scale bars: 0.1 mm. (SCAU)

Fig. 5. Chilocorus melas Weise, 1898. a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i. ovipositor. Scale bars: 0.1 mm. (SCAU)

Fig. 6. Chilocorus rubidus Hope, 1831. a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i–j. Female genitalia: i. ovipositor. j. spermatheca. Scale bars: 0.1 mm. (SCAU)

Fig. 7. Chilocorus chinensis Miyatake, 1970. a. Dorsal view.b. Lateral view. c. Frontal view. d.Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i. Ovipositor. Scale bars: 0.1 mm. (SCAU)

Fig. 8. Chilocorus rufitarsis Motschulsky, 1853. a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i–j. Female genitalia. i. Ovipositor. j. Spermatheca. Scale bars: 0.1 mm. (SCAU)

Fig. 9. Chilocorus hauseri Weise, 1895. a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i–j. Female genitalia. i. Ovipositor. j. Spermatheca. Scale bars: 0.1 mm. (SCAU)

Fig. 10. Chilocorus circumdatus (Gyllenhal, 1808). a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i–j. Female genitalia. i. Ovipositor. j. Spermatheca. Scale bars: 0.1 mm. (SCAU)

Fig. 11. Chilocorus chalybeatus Gorham, 1892. a–b. Dorsal view. c. Lateral view. d. Frontal view. e. Abdomen. f. Penis. g. Apex of penis. h. Tegmen, lateral view. i. Tegmen, ventral view. j–k. Female genitalia. j. Coxit. k. Spermatheca. Scale bars: 0.1 mm. (SCAU)

Fig. 12. Chilocorus shirozui Sasaji, 1968. a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i–j. Female genitalia. i. Ovipositor. j. Spermatheca. Scale bars: 0.1 mm. (NCHU)

Fig. 13. Chilocorus hupehanus Miyatake, 1970. a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i–j. Female genitalia. i. Ovipositor. j. Spermatheca. Scale bars: 0.1 mm. (SCAU)

Fig. 14. Chilocorus strenotubus Li & Wang sp. nov., holotype a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. Scale bars: 0.1 mm. (SCAU (E) 11037)

Fig. 15. Chilocorus kuwanae Silvestri, 1909. a. Dorsal view. b. Lateral view. c. Frontal view. d.Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i. ovipositor. Scale bars: 0.1 mm. (SCAU)

Fig. 16. Chilocorus esakii Kamiya, 1959. a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i–j. Female genitalia. i. Ovipositor. j. Spermatheca. Scale bars: 0.1 mm. (SCAU)

Fig. 17. Chilocorus alishanus Sasaji, 1968. a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e–f. Female genitalia. e. Ovipositor. f. Spermatheca. Scale bars: 0.1 mm. (NCHU)

Fig. 18. Chilocorus bijugus Mulsant, 1853. a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i–j. Female genitalia. i. Ovipositor. j. Spermatheca. Scale bars: 0.1 mm. (SCAU)

Fig. 19. Chilocorus bipustulatus (Linnaeus, 1758). a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i. ovipositor. Scale bars: 0.1 mm. (SCAU)

Fig. 20. Chilocorus geminus Zaslavskij, 1962. a. Dorsal view. b. Lateral view. c. Frontal view. d. Abdomen. e. Penis. f. Apex of penis. g. Tegmen, lateral view. h. Tegmen, ventral view. i. ovipositor. Scale bars: 0.1 mm. (SCAU)