Siobla

Shinohara, Akihiko, Wei, Meicai & Niu, Gengyun, 2013, Revision of Siobla (Hymenoptera, Tenthredinidae) from Japan, Zootaxa 3746 (1), pp. 1-40 : 3-5

publication ID	https://doi.org/ 10.11646/zootaxa.3746.1.1
publication LSID	lsid:zoobank.org:pub:3F817722-7445-4B21-B364-B3C8DE423E0C
DOI	https://doi.org/10.5281/zenodo.6148867
persistent identifier	https://treatment.plazi.org/id/038187E4-C43F-B216-FF4B-C329FA7CA302
treatment provided by	Plazi
scientific name	Siobla
status

Treatment

Key to the Japanese Species of Siobla

1 Female .............................................................................................. 2

- Male............................................................................................... 10

2 Body metallic blue........................................................... Siobla metallica Takeuchi, 1929

- Body black with brownish marks, not metallic blue........................................................... 3

3 Mesoscutellum and most or entire tegula yellowish brown..................................................... 4

- Mesoscutellum black, rarely with small spot at middle; tegula black, with very narrow outer margin sometimes yellowish brown............................................................................................... 6

4 Clypeus, at least apical 4 antennomeres, mesoscutellar appendage, fore and middle trochanters, fore trochantellus, and often middle trochantellus and bases of fore and middle femora black; metascutellum black, often with obscure yellowish macula medially; metapostnotum distinctly microsculptured, matt ( Fig. 10 View FIGURE 10. a – b d)................... Siobla hirasana Takeuchi, 1929

- Clypeus, antenna, mesoscutellar appendage, metascutellum, and fore and mid trochanters, trochantelli and femora yellowish brown; metapostnotum hardly microsculptured, shiny ( Fig. 10 View FIGURE 10. a – b e–f)............................................... 5

5 Eyes small, shortest distance between eyes below about 1.2–1.3 × longest axis of eye ( Fig. 10a View FIGURE 10. a – b ); postocellar area with distinct longitudinal median carina; mesoscutellum flat, not elevated above level of mesoscutum; forewing apically distinctly infuscated; hind tibia mostly orange, with only obscure black spot near apex; abdomen with tergum 1 largely black, segments 4 to 7 mostly whitish or pale orange ventrally, and sternum 7 with each lateral part roundly incised; lancet long ( Fig. 6 View FIGURE 6 g); penis valve as in Fig. 7 View FIGURE 7 l.................................................... .. Siobla pulchra Shinohara, Wei & Niu , sp. nov.

- Eyes large, shortest distance between eyes below about 1.0–1.1 × longest axis of eye ( Fig. 10b View FIGURE 10. a – b ); postocellar area without distinct longitudinal median carina; mesoscutellum strongly roundly elevated, higher than mesoscutum; forewing without distinct infuscation apically; hind tibia with apical third black; abdomen with tergum 1 largely orange, segments 4 to 7 usually mostly blackish ventrally, and sternum 7 with each lateral part nearly truncate; lancet normal ( Fig. 6 View FIGURE 6 b); penis valve as in Fig. 7 View FIGURE 7 n.................................................................................. Siobla ferox (Smith, 1874)

6 Antenna black with apical 4 antennomeres creamy white (terminal antennomere usually darkened); pale areas on abdominal tergum 1 and tibiae of all legs creamy white; eyes large, shortest distance between eyes below about as broad as longest axis of eye; ovipositor sheath 1.0–1.2 × middle tibia in length; mesoscutellum strongly elevated, much higher than mesoscutum................................................................................ Siobla apicalis Takeuchi, 1929

- Antenna largely reddish brown or largely black, apical 4 antennomeres not paler than antennomeres 4 and 5; pale areas on abdominal terga and tibiae yellowish brown; shortest distance between eyes below about 1.0–1.2 × longest axis of eye; ovipositor sheath 0.7–1.0 × middle tibia in length; mesoscutellum weakly elevated, about as high as mesoscutum............... 7

7 Apical 4 antennomeres black............................................................................ 8

- Apical 4 antennomeres reddish brown..................................................................... 9

8 Antenna with flagellum entirely or almost entirely black, with one or two basal flagellomeres often marked with brown dorsally; subapical antennomeres strongly dilated ( Fig. 9 View FIGURE 9. a – e j), antennomere 7 with length about 1.5 × breadth; shortest distance between eyes below 1.3 × longest axis of eye ( Fig. 9 View FIGURE 9. a – e h); broad posterior margin of pronotum usually reddish brown; hairs on temple curved at apex, length about 1.6–1.8 × diameter of middle ocellus; hind leg with coxa, trochanter, trochantellus and femur all black; small species, length 9.5–12.0 mm.................... Siobla japonica Shinohara, Wei & Niu , sp. nov.

- Antenna with basal three flagellomeres usually reddish brown, rarely almost entirely black; subapical antennomeres weakly dilated, antennomere 7 with length about 1.7–1.9 × breadth; shortest distance between eyes below 1.1 × longest axis of eye ( Fig. 11 View FIGURE 11. a – d e); pronotum entirely black, or very narrow posterior margin brownish; hairs on temple straight, length about 1.0–1.2 × diameter of ocellus; hind leg with apex of coxa, trochanter, trochantellus and base of femur pale brown; large species, length 11.0– 15.5 mm ............................................... .. Siobla takeuchii Shinohara, Wei & Niu , sp. nov.

9 Ovipositor sheath about as long as middle tibia; scape, pedicel and basal third of antennomere 3 largely black; apical sheath (=valvula 3) in lateral view as broad as hind tibia at apex in lateral view; abdominal tergum 2 usually coriaceous..................................................................................... Siobla jucunda (Mocsáry, 1909)

- Ovipositor sheath 0.7–0.9 × middle tibia in length; basal 3 antennomeres entirely reddish brown or nearly so; apical sheath in lateral view clearly narrower than apex of tibia in lateral view; abdominal tergum 2 usually smooth.................................................................................................. .. Siobla sturmii (Klug, 1817)

10 Body metallic blue........................................................... Siobla metallica Takeuchi, 1929

- Body without metallic tinge............................................................................ 11

11 Mesoscutellar appendage pale yellow..................................................................... 12

- Mesoscutellar appendage black.......................................................................... 13

12 Eyes small, shortest distance between eyes below 1.0–1.1 × longest axis of eye; postocellar area with distinct median longitudinal carina; mesoscutellum weakly raised, about as high as mesoscutum; hind tibia mostly reddish brown, with black spot on inner surface near apex; forewing distinctly infuscated apically; apical part of abdomen black dorsally and reddish brown ventrally........................................................ Siobla pulchra Shinohara, Wei & Niu , sp. nov.

- Eyes large, shortest distance between eyes below 0.7–0.8 × longest axis of eye; postocellar area without distinct median longitudinal carina; mesoscutellum strongly raised, much higher than mesoscutum; hind tibia with apical half black; forewing hyaline, without distinct apical infuscation; apical part of abdomen black on both sides........... Siobla ferox (Smith, 1874)

13 Antenna with at least 4 apical antennomeres black........................................................... 14

- Antenna with at least 4 apical antennomeres pale............................................................ 16

14 Antenna entirely black; abdominal terga 1–3 usually with distinct microsculpture dorsally, not polished; penis valve short and robust ( Fig. 8 View FIGURE 8 m); small species, length 7.5–11.0 mm................... Siobla japonica Shinohara, Wei & Niu , sp. nov.

- Antenna usually with basal flagellomeres reddish brown; abdominal terga 1–3 usually without distinct microsculpture dorsally, polished; penis valve elongate; large species, length 9.5–14.0 mm.............................................. 15

15 Tegula and mesoscutellum usually largely yellowish brown; hind trochanter and trochantellus entirely whitish brown, rarely partly marked with blackish brown.............................................. Siobla hirasana Takeuchi, 1929

- Tegula and mesoscutellum entirely black; hind trochanter and trochantellus largely blackish brown or black........................................................................... Siobla takeuchii Shinohara, Wei & Niu , sp. nov.

16 Antenna black, with antennomeres 6–8 creamy white and antennomere 5 and 9 often partly dark brownish to whitish.................................................................................. Siobla apicalis Takeuchi, 1929

- Antenna reddish brown, with 3 or 4 basal antennomeres partly black........................................... 17

17 Malar space with length about 0.3 × diameter of lateral ocellus ( Fig. 10 View FIGURE 10. a – b g); shortest distance between eyes below about 0.9 × longest axis of eye; at least apical 0.4 of antennomere 3 and more apical antennomeres entirely reddish brown; hairs on head blackish and straight ( Fig. 10 View FIGURE 10. a – b g); hind femur marked with reddish brown.................... Siobla sturmii (Klug, 1817)

- Malar space with length about 0.2 × diameter of lateral ocellus ( Fig. 10 View FIGURE 10. a – b h); shortest distance between eyes below about 0.6–0.7 × longest axis of eye; apical 0.15 of antennomere 3 and more apical antennomeres reddish brown, sometimes antennomere 4 marked with black; hairs on head brownish, weakly curved at apex ( Fig. 10 View FIGURE 10. a – b h); hind femur entirely black........................................................................................... Siobla jucunda (Mocsáry, 1909)