Dolichogenidea laevigata

Liu, Zhen, He, Jun-Hua & Chen, Xue-Xin, 2018, The laevigata - group of the genus Dolichogenidea Mason, 1981 from China, with descriptions of 26 new species, Zootaxa 4436 (1), pp. 1-74: 4-7

publication ID

https://doi.org/10.11646/zootaxa.4436.1.1

publication LSID

lsid:zoobank.org:pub:2F387153-0204-49B7-B654-84E6C0466733

persistent identifier

http://treatment.plazi.org/id/2D033238-0E0C-AC1A-FF61-AB60FA04A0F9

treatment provided by

Plazi

scientific name

Dolichogenidea laevigata
status

 

Key to species of the laevigata  -group of the genus Dolichogenidea  from China

1. Metacarp short, at most as long as pterostigma, at most twice as long as its distance from apex of the marginal cell (e.g. Fig. 28a View Figure )................................................................................................ 2

- Metacarp long, usually distinctly longer than pterostigma, at least three× as long as distance from apex of the marginal cell (e.g. Fig. 2d View Figure ).......................................................................................... 6

2. Pterostigma brown with a pale basal spot ( Fig. 15f View Figure ).......................................... D. litae ( Nixon, 1972) 

- Pterostigma evenly brown or pale, never with basal spot (e.g. Fig. 33g View Figure )........................................... 3

3. Tegula yellow; pterostigma pale with darker border; body shiny to polished................ D. turkmenus ( Telenga, 1955) 

- Tegula brown to dark; pterostigma evenly brown; body relatively dull............................................ 4

4. Metacarp not shorter than length of pterostigma, about twice longer than its distance from apex of the marginal cell; T1 frequently distinctly a little widened towards apex ( Fig. 28e View Figure ); vein r distinctly  longer than vein 2-SR ( Fig. 28a View Figure ).............................................................................. D. sicarius ( Marshall, 1885) 

- Metacarp shorter than length of pterostigma, its distance from apex of the marginal only weakly shorter than its own length; T1 not widened towards apex; vein r slightly  shorter (or as long as) vein 2-SR........................................ 5

5. T1 strongly constricted posteriorly; T1-2 strongly rugose and dull; propodeum densely rugose ( Fig. 20a View Figure )......................................................................................... D. obscurugosus Liu & Chen  , sp. n.

- T1 parallel-sided; T1-2 almost polished and shiny; body relatively dull; propodeum less rugose ( Fig. 19d View Figure )................................................................................................. D. nixosiris ( Papp, 1976) 

6. Pterostigma brown with one or two ( D. bimacula  ) obviously yellow or pale basal spot............................... 7

- Pterostigma evenly brown or pale, without basal spot........................................................ 36

7. Pterostigma brown with two obviously yellow spot basally and apically................. D. bimacula Song et Chen, 2004 

- Pterostigma brown with only one obviously yellow or pale spot basally........................................... 8

8. Ovipositor sheath remarkably wide (often as wide as length of 2nd hind tarsus) (e.g. Fig. 11g View Figure )........................ 9

- Ovipositor sheath usually narrow (e.g. Fig. 23e View Figure )............................................................ 13

9. Legs, usually except black coxae and trochanters, reddish yellow to vivid yellow, at least hind femur yellow (e.g. Fig. 11g View Figure ). 10

- Legs dark, at least hind femur, usually middle and hind femora, black or brownish black............................ 12

10. Mesosoma longer than metasoma; T2 distinctly more than half length of T3; hind half of T1 scattered shallow punctures; T2 at most slightly uneven; every tergite relatively shiny and polished (e.g. Fig. 11c View Figure ).................................... 11

- Mesosoma shorter than metasoma; T2 half length of T3; hind half of T1 rugose; T2 uneven to subrugulose; every tergite dull (legs sometimes with more or less blackish pattern)....................................... D. dilecta ( Haliday, 1834) 

11. Ovipositor sheath shorter than hind tibia; wings frequently fumous ( Fig. 11d View Figure ); propodeum rugose medially............................................................................................ D. fumeus Liu & Chen  , sp. n.

- Ovipositor sheath equal with hind tibia plus 2nd hind tarsus; wing membrane hyaline; propodeum smooth medially.................................................................................... D. laticauda Chen et Song, 2004 

12. Mesosoma strongly stout; metasoma inclined to mesosoma at an angle of 60; antennomeres nearly of even width................................................................................... D. cultriformis Chen et Song, 2004 

- Mesosoma normal; metasoma not downcurved; the last 12-15 antennomeres abruptly expanded ( Fig. 1c View Figure )......................................................................................... D. aberrantenna Liu & Chen  , sp. n.

13. Legs, usually except black coxae and trochanters, reddish yellow to vivid yellow, at least hind femur yellow............ 14

- Legs dark, at least hind femur, usually middle and hind femora, black or brownish black............................ 30

14. T1 posteriorly with weakly or distinctly widening sides...................................................... 15

- T1 parallel-sided or with rather converging sides............................................................ 21

15. Ovipositor sheath only 2/3 length of hind basitarsus; T2 less transverse (only 2.3× wider than long in the middle) and as long as T3 ( Fig. 13f View Figure )............................................................. D. gansuensis Liu & Chen  , sp. n.

- Ovipositor sheath distinctly longer than hind basitarsus; T2 more transverse and distinctly shorter than T3.............. 16

16. T1 weakly with arched sides; metasoma fully bright yellow ( Fig. 14e View Figure ); vein cu-a nearly straight and perpendicular to vein 1-1A....................................................................... D. indicaphagous Liu & Chen  , sp. n.

- T1 evenly widened to apex; metasoma fully dark brown or partly yellow; vein cu-a more or less curved................ 17

17. Obvious wide dark reddish-brown bands on imaginary notaulices; vein r and  2-SR distinctly angled at their meeting; ovipositor sheath only 3/4 length of hind tibia.......................................... D. rufescentis Chen et Song, 2004 

- No wide dark reddish-brown bands on imaginary notaulices; vein r and  2-SR indistinctly angled at their meeting; ovipositor sheath at least 1.4× longer than hind tibia.................................................................. 18

18. T1 and T2 strongly rugose; disc of mesonotum more heavily and coarsely punctate; tergites posterior to T2 mostly vivid yellow ( Fig. 23d View Figure )............................................................... D. partergita Liu & Chen  , sp. n.

- T1 and T2 shallowly punctate to smooth; disc of mesonotum shallowly finely punctate; all tergites black or unevenly yellowish brown.............................................................................................. 19

19. Ocelli on high triangle, posterior tangent to the anterior ocellus at most touching the posterior pair (e.g. Fig. 2g View Figure ); spines on outer side of hind tibia disperse and sparse; tegula black or yellow.............................................. 20

- Ocelli on low triangle, posterior imaginary tangent to the anterior ocellus virtually transecting the posterior pair; spines on outer side of hind tibia much denser; tegula yellow............................. D. paranthreneus ( You et Dang, 1987) 

20. Penultimate antennomere 1.7× longer than wide; T3 1.4× as long as T2; propodeum polished, two short arms reach out from orifice ( Fig. 2c View Figure ); all tergites black............................................ D. aegeriphagous Liu & Chen  , sp. n.

- Penultimate antennomere 1.3-1.5× longer than wide; T3 nearly twice longer than T2; propodeum with considerable rugosities around posterior orifice; tergites unevenly yellowish.................................. D. laevigata ( Ratzeburg, 1848) 

21. T1 slightly constricted before its hind end........................................ D. breviventris ( Ratzeburg, 1848) 

- T1 not constricted before its hind end..................................................................... 22

22. Ovipositor sheath at most as long as hind tibia.............................................................. 23

- Ovipositor sheath at least 1.2× as long as hind tibia.......................................................... 27

23. Inner spur of hind tibia over half of hind basitarsus ( Fig. 30b View Figure ); hypopygium distinctly produced into a spinule ( Fig. 30f View Figure ); last five antennomeres yellow..................................................... D. spinulicula Liu & Chen  , sp. n.

- Inner spur of hind tibia less than half of hind basitarsus; hypopygium not produced into a spinule; last five antennomeres darker.............................................................................................. 24 24. Ocelli on obtuse triangle, posterior imaginary tangent to fore ocellus transecting hind two ocelli; T2 at least 3× wider than long in the middle; 1 st discal  cell of fore wing wider than high (e.g. Fig. 25c View Figure )......................................... 25

- Ocelli on sharp triangle, posterior imaginary tangent to fore ocellus hardly touching hind two ocelli; T2 only 2.4× wider than long in the middle; 1 st discal  cell of fore wing higher than wide......................... D. stenosis Song et Chen, 2004 

25. T1 longer; T2 straight apically, and shorter; distance between fore and a hind ocellus shorter than diameter of an ocellus (e.g. Fig. 27a View Figure )........................................................................................... 26

- T1 shorter; T2 deeply curved into T3, and longer; distance between fore and a hind ocellus longer than diameter of an ocellus ( Fig. 25 View Figure )............................................................ D. polystinelliphagous Liu & Chen  , sp. n.

26. Tergites 3–5 vivid yellow or yellowish brown with white hind ( Fig. 27b View Figure ); T2 less transverse; T1 not concave medially................................................................................. D. sandwico Liu & Chen  , sp. n.

- Tergites black; T2 very transverse; T1 distinctly concave medially ( Fig. 6i View Figure )............. D. brevifacialis Liu & Chen  , sp. n.

27. Seven to eight oblique carinae on outside of basal hind coxa.......................... D. oblicarina Song et Chen, 2004 

- No oblique carinae on outside of basal hind coxa, polished or punctate.......................................... 28

28. Ovipositor sheath 1.6× longer than hind tibia; ocelli on high triangle...................... D. cauda Song et Chen, 2004 

- Ovipositor sheath about 1.2× longer than hind tibia; ocelli on low triangle........................................ 29

29. T2 3× wider than long in the middle; T3 weakly rugulose anteriorly ( Fig. 4c View Figure ); T1 strongly rugose................................................................................................... D. anteruga Liu & Chen  , sp. n.

- T2 4× wider than long in the middle; T3 polished anteriorly; T1 only weakly rugulose on bump medially............................................................................................. D. claniae ( You et Zhou, 1990) 

30. T1 distinctly widened posteriorly; T1 transverse; hind femur stout, 2.8× longer than wide ( Fig. 34f View Figure )................................................................................................ D. unicarina Liu & Chen  , sp. n.

- T1 subparallel or parallel or with weakly arched sides; T1 long to very long; hind femur normal, at least 4× longer than wide.................................................................................................... 31

31. Face relatively long; 1 st discal  cell wide, 1.3× wider than high; temple very broad; ovipositor sheath 1.3× longer than hind tibia....................................................................... D. biconcava Liu & Chen  , sp. n.

- Face normal; 1 st discal  cell only weakly wider than high; temple constricted to a little broad; ovipositor sheath shorter than hind tibia........................................................................................... 32

32. T1 with arched sides.................................................................................. 33

- T1 parallel to subparallel............................................................................... 34

33. Ovipositor sheath nearly as long as hind tibia; hypopygium not produced into a spinule; tegula pale yellow ( Fig. 3h View Figure )................................................................................ D. ancylotergita Liu & Chen  , sp. n.

- Ovipositor about length of third basitarsus; hypopygium produced into a spinule; tegula black...... D. sophiae (Papp, 1972) 

34. T1 subparallel, weakly constricted posteriorly; ovipositor sheath distinctly expanded towards apex; vein cu-a straight ( Fig. 9f View Figure )......................................................................... D. concentricus Liu & Chen  , sp. n.

- T1 with parallel sides; ovipositor sheath parallel-sided; vein cu-a strongly curved.................................. 35

35. T1 strongly rugose and distinctly concave medially; 1 st discal  cell nearly 1.3× wider than high; and punctures on mesonotum sparse.................................................................... D. mesocanalis Liu & Chen  , sp. n.

- T1 almost impunctate; 1 st discal  cell weakly wider; punctures on mesonotum coarse and dense ( Fig. 31h View Figure )........................................................................................ D. stictoscutella Liu & Chen  , sp. n.

36. T1 with weakly arched sides; body wholly highly shiny; ovipositor sheath more or less falcate ( Fig. 10d View Figure )...................................................................................... D. dioryctriphagous Liu & Chen  , sp. n.

- T1 parallel or distinctly (but never strongly) constricted posteriorly; body not that shiny; ovipositor sheath not falcate..... 37

37. T1 constricted (weakly to distinctly) posteriorly............................................................ 38

- T1 parallel-sided..................................................................................... 45

38. 1 st discal  cell wide, usually one-third, wider than high (e.g. Fig. 41d)........................................... 39

- 1 st discal  cell less wide, usually a quarter, wider than high.................................................... 42

39. Legs yellow to bright reddish yellow; pterostigma yellow..................................................... 40

- Legs dark; pterostigma either pale or brown................................................................ 41

40. Body wholly bright reddish yellow ( Fig. 21a View Figure ); penultimate antennomere transverse; head a little round in dorsal view............................................................................... D. paracostulae Liu & Chen  , sp. n.

- Body wholly dark; penultimate antennomere over twice longer than wide ( Fig. 8h View Figure ); head rather transverse in dorsal view ( Fig. 8g View Figure ).................................................................... D. changbaiensis Liu & Chen  , sp. n.

41. Pterostigma pale ( Fig. 22b View Figure ); horizontal surface of T1 smooth to uneven or sparsely shallowly punctate; penultimate antennomere more than 1.5× longer than wide, usually twice............................... D. parametacarp Liu & Chen  , sp. n.

- Pterostigma brown; horizontal surface of T1 conspicuously rugose all over; penultimate antennomere varying from one-andone-third to one-and-a-half........................................................... D. mycale ( Nixon, 1972) 

42. Legs, usually except black coxae and trochanters, reddish yellow to vivid yellow, at least hind femur yellow............ 43

- Legs dark, at least hind femur, usually middle and hind femora, black or brownish black............................ 44

43. Metasoma mostly yellow; vein cu-a straight; horizontal part of T1 with medial trough... D. flavigastrula Song et Chen, 2004 

- Metasoma mostly black; vein cu-a curved; horizontal part of T1 without medial trough..... D. longivena Liu & Chen  , sp. n.

44. Ovipositor sheath very long (at least 1.8× longer than hind tibia), thin, setose ( Fig. 12c View Figure ); pterostigma pale to white; T2 deeply curved into T3 and shorter................................................... D. funalicauda Liu & Chen  , sp. n.

- Ovipositor sheath short (less than hind tibia), thick; pterostigma dark brown; T2 weakly curved into T3 and longer.......................................................................................... D. phaola ( Nixon, 1972)  45. Body mostly reddish brown; a black line extended from middle ocellus to occiput ( Fig. 32b View Figure ); sulcus between T2 and T3 indistinct ( Fig. 32h View Figure )................................................................ D. testacea Liu & Chen  , sp. n.

- Body wholly black; no black line joining middle ocellus and occiput; sulcus between T2 and T3 distinct............... 46

46. Hind femur reddish yellow; pterostigma large, twice longer than wide; ocelli large, distance between fore and a hind ocellus shorter than diameter of an ocellus................................................... D. decorus ( Haliday, 1834) 

- Hind femur relatively dark brown; pterostigma small, nearly 3× longer than wide; ocelli small, distance between fore and a hind ocellus longer than diameter of an ocellus............................................................. 47

47. Spines on outer side of hind tibia extremely numerous and close-set; 1 st discal  cell distinctly, one-third, wider than high; T1 and T2 more or less rugulose......................................................... D. purdus ( Nixon, 1972) 

- Spines on outer side of hind tibia less numerous or sparse, disperse; 1 st discal  cell almost as wide as high; T1 and T2 smooth and polished................................................................ D. poliobrevis Liu & Chen  , sp. n.