Steganopsis de Meijere, 1909

Shi, Li, Wang, Donghui & Yang, Ding, 2023, Species of the genus Steganopsis from China (Diptera: Lauxaniidae), Zoological Systematics 48 (2), pp. 177-183 : 178

Steganopsis de Meijere, 1909

Steganopsis de Meijere, 1909 : LIII. Type species: Steganopsis pupicola de Meijere, 1909 by monotypy.

Remarks. The genus is easily identified by the following characters: face prominently convex, with or without a pair of black spots; frons with or without a narrow middle stripe, anteriormost or inclinate; antenna elongate, first flagellomere slender and longer than scape + pedicel; mesonotum with 0+2 or 0+3 dc, acr in 2 or 4 rows; wing distinctively rounded, R 2+3 curving forward to costa, arching and extending close to wing tip (Stuckenburg, 1971).

The genus Steganopsis is similar to the genus Pachycerina (Macquart, 1835) , but can be separated from the latter by vein R 2+3 curving forward close to upper margin of wing, expect S. divergens Frey, 1927 , which has vein R 2+3 paralleling with upper margin of wing. In the male genitalia, the syntergosternite combines as a whole piece in Steganopsis ( Figs 5 , 10 , 15 ), but the genus Pachycerina has the syntergosternite splits on both sides (see Shi et al., 2009: figs 15–16).

Key to species of the genus Steganopsis from China.

1. Frons brown or black with a narrow middle stripe from ocellar triangle to frontal margin; face brown to black, rugose, frontofacial angle far beyond 90°; mesonotum acr in 4 rows; mesopleuron and pteropleuron entirely pale yellow; wing brownish, with a brown wide band on costal margin ( Fig. 3 )............................................................................................................................... S. multilineata Frons yellow without middle stripe; face brownish yellow, not rugose, frontofacial angle slightly beyond 90°; mesonotum acr in 2 rows; mesopleuron, pteropleuron and wing not as above ( Figs 1–2 ) ...................................................................................................2

2. Wing with 1 narrow white stripe between tips of vein R 2+3 and R 4+5 ( Fig. 1 ); mesonotum with 4 reddish brown vittae, 0+3 dc .......... ....................................................................................................................................................................................... S. convergens Wing without narrow white stripe between tips of R 2+3 and R 4+5 ( Fig. 2 ); mesonotum with 12–14 brown vittae, 0+2 dc ..................... ................................................................................................................................................ S. mayanghensis Shi & Yang , sp. nov.

Figures

Figures 4–8. Stegonopsis convergens Hendel, 1913, male. 4. Syntergosternite and epandrium, lateral view; 5. Syntergosternite, anterior view; 6. Epandrium, posterior view; 7. Aedeagal complex, ventral view; 8. Aedeagal complex, lateral view.

Figures 9–13. Stegonopsis mayanghensis Shi & Yang, sp. nov., male. 9. Epandrium, lateral view; 10. Syntergosternite, anterior view; 11. Epandrium, posterior view; 12. Aedeagal complex, ventral view; 13. Aedeagal complex, lateral view.

Figures 14–18. Stegonopsismultilineata de Meijere,1924, male.14.Syntergosternite and epandrium, lateral view; 15.Syntergosternite, anerior view; 16. Epandrium, posterior view; 17. Aedeagal complex, ventral view; 18. Aedeagal complex, lateral view.

Figures 1–3. Wings of Stegonopsis spp. 1. S. convergens Hendel, 1913; 2. S. mayanghensis Shi & Yang, sp. nov.; 3. S. multilineata de Meijere, 1924.