Minettia (Plesiominettia), Shatalkin, 2000

Li, Wenliang, Bai, Yingming & Yang, Ding, 2023, The genus Minettia Robineau-Desvoidy, 1830 (Diptera: Lauxaniidae: Lauxaniinae) from the Oriental Region with descriptions of seventeen new species, Zootaxa 5256 (3), pp. 201-249 : 203-205

Key to separate species of the subgenus Plesiominettia

(modified from Shi et al., 2015)

1. Mesonotum with presutural dorsocentral setae.............................................................. 2

- Mesonotum without presutural dorsocentral setae............................................................ 4

2. Head with orbits yellow ( Figs. 81 , 101 )................................................................... 3

- Head with orbits not as above....................................................... M. (P.) ishidai (Sasakawa)

3. Face with one yellow median longitudinal stripe; first flagellomere yellow; acrostichal setulae in six rows; mesonotum with five white longitudinal stripes ( Fig. 84 )................................................. M. (P.) orbitalis sp. nov.

- Face without yellow longitudinal stripe; first flagellomere only yellow at base ( Fig. 101 ); acrostichal setulae in eight rows; mesonotum with three white longitudinal stripes ( Fig. 104 )............................. M. (P.) spiniphallata sp. nov.

4. Mesonotum without strong acrostichal seta before prescutellar setae............................................. 5

- Mesonotum with 1–2 pairs of strong acrostichal setae before prescutellar setae.................................... 11

5. Body entirely yellow.................................................................. M. (P.) filia (Becker)

- Body partly black or entirely brown to black................................................................ 6

6. Acrostichal setulae in eight irregular rows; male genitalia: epandrium and surstylus fused; phallus broad and truncate apically ................................................................................................... 7

- Acrostichal setulae in six rows; male genitalia: epandrium and surstylus articulate; phallus narrow or rounded apically..... 8

7. Frons with two black longitudinal stripes along fronto-orbital rows and one triangular black longitudinal stripe extending from ocellar triangle to anterior margin of frons; abdominal tergites bicolored ( Fig. 5 ); syntergosternite circular ( Fig. 8 ); phallapodeme slightly shorter than phallus ( Fig. 9 ).................................................. M. (P.) bicolorata sp. nov

- Frons without longitudinal stripe; parafacial with one blackish brown spot between eye and antennal bases; abdominal tergites blackish brown; syntergosternite semicircular; phallapodeme shorter than 1/4 length of phallus.............................................................................................. M. (P.) tridentata Shi, Gaimari et Yang

8. Face yellow with a large black round median spot above ventral margin; arista bare; abdominal tergites 2–5 each with brownish yellow posterior margin............................................................ M. (P.) gemmata Shatalkin

- Face brown to black without black medial spot; rays of arista with longest setulae shorter than 1/3 height of 1st flagellomere or longer than half height of 1st flagellomere; abdominal tergites 2–5 without brownish yellow posterior margin............ 9

9. Arista pubescent, rays of arista with longest setulae shorter than 1/3 height of 1st flagellomere; abdomen black or blackish brown with pruinescence.............................................................................. 10

- Arista plumose, rays of arista with longest setulae as long as 3/5–4/5 height of 1st flagellomere; abdominal tergites brownish yellow along medial line and dark brown to black on lateral margins.......................... M. (P.) gemina Shatalkin

10. Frons with a pair of black longitudinal stripes along fronto-orbital rows, extending from ocellar triangle to occiput; parafacial without black spot ( Fig. 110 ); hind femur without anterior ventral seta; male genitalia ( Figs. 115–119 ): syntergosternite circular, surstylus scabbard-shaped, with one forward spiny process near base........................ M. (P.) surstylata sp. nov.

- Frons without black longitudinal stripes; parafacial with one black spot between eye and base of antenna; hind femur with a row of anterior ventral setae; male genitalia: syntergosternite semicircular, surstylus with narrow double processes in lateral view.................................................................. M. (P.) nigrantennata Shi, Gaimari et Yang

11. Mesonotum with two pairs of strong acrostichal setae....................................................... 12

- Mesonotum with one pair of strong acrostichal setae........................................................ 14

12. Body black except frons, face, mesonotum, scutellum and metanotum yellow; male genitalia: surstylus less prominent (Remm and Elberg 1979: Fig. 13 ).............................................................. M. (P.) loewi (Schiner)

- Body entirely brown to black; male genitalia: surstylus short broad or otherwise shaped............................ 13

13. Arista with longest setulae as long as 1/7 height of 1st flagellomere; frons and legs entirely brown; male genitalia: surstylus widened apically and narrow subapically, with a small concavity at middle of apical edge.......... M. (P.) helvola (Becker)

- Arista short plumose, rays of arista with longest setulae at least longer than 1/3 height of 1st flagellomere; frons yellow on anterior 1/5; legs dark brown except base of tibiae and tarsi yellowish; male genitalia: surstylus consisting of outer process narrow basally and bifurcated apically, and inner process clubbed and slender in lateral view... M. (P.) divaricata Sasakawa

14. Body entirely yellow................................................................................. 15

- Body mostly brown to black........................................................................... 16

15. Mesonotum without long acrostichal setulae; scutellum without large black lateral spots on lateral margin................................................................................................... M. (P.) helva Czerny

- Mesonotum with a pair of distinct acrostichal setulae as long as first postsutural dorsocentral setae; scutellum with a pair of large black lateral spots on lateral margin.............................................. M. (P.) punctata Sasakawa

16. Mesonotum with acrostichal setulae in four to six rows...................................................... 17

- Mesonotum with acrostichal setulae in eight to ten rows...................................................... 27

17. Mesonotum with acrostichal setulae in six rows............................................................ 18

- Mesonotum with acrostichal setulae in four rows........................................................... 24

18. Frons with a pair of black longitudinal stripes along fronto-orbital rows......................................... 19

- Frons without black longitudinal stripes along fronto-orbital rows.............................................. 20

19. Head brownish yellow ( Fig. 11 ); fore femur with seven posterior ventral setae; surstylus fused with epandrium; connected by one U-shaped sclerite behind cercus in posterior view ( Fig. 17 )................................. M. (P.) caii sp. nov

- Head blackish brown ( Fig. 91 ); fore femur with five posterior ventral setae ( Fig. 93 ); surstylus separated from epandrium, without connected sclerite ( Fig. 97 )................................................... M. (P.) prominens sp. nov.

20. Frons with two brownish yellow longitudinal stripes along fronto-orbital rows extending to ocellar triangle ( Fig. 71 ).................................................................................... M. (P.) nujiangensis sp. nov.

- Frons without brownish yellow longitudinal stripe.......................................................... 21

21. Anterior margin of mesonotum brownish yellow, with two brownish yellow longitudinal stripes along dorsocentral rows almost reaching the third post-sutural dorsocentral setae ( Fig. 44 ).................................. M. (P.) huangi sp. nov.

- Anterior margin of mesonotum blackish brown, without brownish yellow longitudinal stripe along dorsocentral rows..... 22

22. Ocellar setae almost 2 times longer than anterior fronto-orbital setae; rays of arista with longest setulae as long as 1/2 height of 1st flagellomere; stem vein brown; surstylus near cylindrical, curved apically ( Fig. 67 ); phallus with one median elongate oval sclerotized structure ( Fig. 69 )...................................................... M. (P.) mediclavata sp. nov

- Ocellar setae as long as or slightly longer than anterior fronto-orbital setae; rays of arista with longest setulae as long as 1/4 height of 1st flagellomere; stem vein not as above; surstylus slender; phallus not as above........................... 23

23. Haltere pale yellow ( Fig. 53 ); male genitalia ( Figs. 56–60 ): syntergosternite with a pair of small ventral processes; surstylus bifurcated in lateral view; phallus without sharp apical processes........................... M. (P.) ludingensis sp. nov.

- Haltere with knob brown; male genitalia: syntergosternite with one broad ventral processes; surstylus not bifurcated; phallus with four sharp apical processes..................................................... M. (P.) crassulata Shatalkin

24. Rays of arista with longest setulae as long as 1/4 or 1/2 height of 1st flagellomere; male genitalia: surstylus articulated with epandrium.......................................................................................... 25

- Rays of arista with longest setulae as long as or slightly longer than basal height of arista; male genitalia: epandrium and surstylus fused...................................................................................... 26

25. Arista with longest setulae as long as 1/4 height of first flagellomere ( Fig. 21 ); surstylus long clavate ( Fig. 27 ); postgonite cylindrical and shorter than phallus ( Fig. 29 )............................................... M. (P.) cuiae sp. nov.

- Arista with longest setulae as long as 1/2 height of first flagellomere; surstylus long falcate; postgonite poorly developed..................................................................... M. (P.) flavoscutellata Shi, Gaimari et Yang

26. Halter dark brown except stem yellowish at base; male genitalia: surstylus slender and curved, claviform, acute apically................................................................................. M. (P.) fuscescens Shatalkin

- Halter entirely yellow; male genitalia: surstylus short and rounded apically.................. M. (P.) tenebrica Shatalkin

27. Body yellow to dark yellow; male genitalia: surstylus with a pair of very long aciculiform processes................................................................................... M. (P.) longaciculiformis Shi, Gaimari et Yang

- Body brown to black; male genitalia with short claviform process or process shaped otherwise....................... 28

28. Mid tibia with one strong apicoventral setae............................................................... 29

- Mid tibia with two strong apicoventral setae............................................................... 30

29. Wing brown at base ( Fig. 32 ); male genitalia ( Figs. 36–40 ): syntergosternite semicircular; surstylus absent; pregonite longer than phallus; phallus with one trident sclerotized structure inside...................... M. (P.) dulongjiangensis sp. nov.

- Wing yellow at base; male genitalia: syntergosternite circular; surstylus claviform narrowing gradually, with a tiny median process and tiny setulae in lateral view; postgonite shorter than phallus; phallus without trident sclerotized structures inside.................................................................................... M. (P.) omei Shatalkin

30. Acrostichal setulae in ten irregular rows; male genitalia: surstylus with a long clubbed process, curved ventrally at tip................................................................................... M. (P.) longistylis Sasakawa

- Acrostichal setulae in eight rows; male genitalia: surstylus with an acute geniculate outer process and a curved aciculiform inner process......................................................... M. (P.) zhejiangica Shi, Gaimari et Yang

Figures

FIGURES 81–85. Minettia (Plesiominettia) orbitalis sp. nov. Male. 81. head, anterior view; 82. wing; 83. habitus, lateral view; 84. thorax, dorsal view; 85. abdomen, dorsal view.

FIGURES 101–104. Minettia (Plesiominettia) spiniphallata sp. nov. Male. 101. head, anterior view; 102. wing; 103. habitus, lateral view; 104. thorax, dorsal view.

FIGURES 1–5. Minettia (Plesiominettia) bicolorata sp. nov. Male. 1. head, anterior view; 2. wing; 3. habitus, lateral view; 4. thorax, dorsal view; 5. abdomen, dorsal view.

FIGURES 6–10. Minettia (Plesiominettia) bicolorata sp. nov. Male. 6. syntergosternite and epandrium, lateral view; 7. epandrial complex, posterior view; 8. syntergosternite, anterior view; 9. phallic complex, ventral view; 10. phallic complex, lateral view. Scale 0.5 mm.

FIGURES 110–114. Minettia (Plesiominettia) surstylata sp. nov. Male. 110. head, anterior view; 111. wing; 112. habitus, lateral view; 113. thorax, dorsal view; 114. abdomen, dorsal view.

FIGURES 115–119. Minettia (Plesiominettia) surstylata sp. nov. Male. 115. syntergosternite and epandrium, lateral view; 116. epandrial complex, posterior view; 117. syntergosternite, anterior view; 118. phallic complex, ventral view; 119. phallic complex, lateral view. Scale 1 mm.

FIGURES 11–15. Minettia (Plesiominettia) caii sp. nov. Male. 11. head, anterior view; 12. wing; 13. habitus, lateral view; 14. thorax, dorsal view; 15. abdomen, dorsal view.

FIGURES 16–20. Minettia (Plesiominettia) caii sp. nov. Male. 16. syntergosternite and epandrium, lateral view; 17. epandrial complex, posterior view; 18. syntergosternite, anterior view; 19. phallic complex, ventral view; 20. phallic complex, lateral view. Scale 0.5 mm.

FIGURES 91–95. Minettia (Plesiominettia) prominens sp. nov. Male. 91. head, anterior view; 92. wing; 93. habitus, lateral view; 94. thorax, dorsal view; 95. abdomen, dorsal view.

FIGURES 96–100. Minettia (Plesiominettia) prominens sp. nov. Male. 96. syntergosternite and epandrium, lateral view; 97. epandrial complex, posterior view; 98. syntergosternite, anterior view; 99. phallic complex, ventral view; 100. phallic complex, lateral view. Scale 0.5 mm.

FIGURES 71–75. Minettia (Plesiominettia) nujiangensis sp. nov. Male. 71. head, anterior view; 72. wing; 73. habitus, lateral view; 74. thorax, dorsal view; 75. abdomen, dorsal view.

FIGURES 41–45. Minettia (Plesiominettia) huangi sp. nov. Male. 41. head, anterior view; 42. wing; 43. habitus, lateral view; 44. thorax, dorsal view; 45. abdomen, dorsal view.

FIGURES 66–70. Minettia (Plesiominettia) mediclavata sp. nov. Male. 66. syntergosternite and epandrium, lateral view; 67. epandrial complex, posterior view; 68. syntergosternite, anterior view; 69. phallic complex, ventral view; 70. phallic complex, lateral view. Scale 1 mm.

FIGURES 51–55. Minettia (Plesiominettia) ludingensis sp. nov. Male. 1. head, anterior view; 2. wing; 3. habitus, lateral view; 4. thorax, dorsal view; 5. abdomen, dorsal view.

FIGURES 56–60. Minettia (Plesiominettia) ludingensis sp. nov. Male. 6. syntergosternite and epandrium, lateral view; 7. epandrial complex, posterior view; 8. syntergosternite, anterior view; 9. phallic complex, ventral view; 10. phallic complex, lateral view. Scale 1 mm.

FIGURES 21–25. Minettia (Plesiominettia) cuiae sp. nov. Male. 21. head, anterior view; 22. wing; 23. habitus, lateral view; 24. thorax, dorsal view; 25. abdomen, dorsal view.

FIGURES 26–30. Minettia (Plesiominettia) cuiae sp. nov. Male. 26. syntergosternite and epandrium, lateral view; 27. epandrial complex, posterior view; 28. syntergosternite, anterior view; 29. phallic complex, ventral view; 30. phallic complex, lateral view. Scale 0.5 mm.

FIGURES 31–35. Minettia (Plesiominettia) dulongjiangensis sp. nov. Male. 31. head, anterior view; 32. wing; 33. habitus, lateral view; 34. thorax, dorsal view; 35. abdomen, dorsal view.

FIGURES 36–40. Minettia (Plesiominettia) dulongjiangensis sp. nov. Male. 36. syntergosternite and epandrium, lateral view; 37. epandrial complex, posterior view; 38. syntergosternite, anterior view; 39. phallic complex, ventral view; 40. phallic complex, lateral view. Scale 1 mm.