(Tarpheion) van Achterberg 1976
Creators: name: Lu, Qian-Yu
name: Chai, Hong-Fei
name: Achterberg, Cornelis Van
name: Tang, Pu
name: Chen, Xue-Xin
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia

description: Key to Chinese species of subgenus Tarpheion van Achterberg
1 Occipital carina completely absent, precoxal sulcus reduced, usually only medially (partly) shallowly impressed, striae less (except B. (T.) sculptilis); vein 1-CU1: 2-CU1 of fore wing ≈ 1:10; notauli usually narrow (except B. (T.) frontalis)....... 2
- Occipital carina present at least up to level of ventral half of eye, precoxal sulcus complete and impressed, striae more; vein 1-CU1: 2-CU1 of fore wing ≤ 1:5 (except B. (T.) apicalis = 1:7); notauli usually wide (except B. (T.) reticulatus, bicolor and artomandibularis).................................................................................... 6
2 Length of first metasomal tergite of female 2.75–2.95 × its apical width (Figs 18G, 28E)............................. 3
- Length of first tergite of female 2.3–2.5 × its apical width (Figs 2F, 4E, 22G)...................................... 4
3 Antenna of ♀ with 20 antennomeres; posterior half of notauli narrow and finely crenulate; mesosoma dark brown; posterior half of pronotal side and precoxal area largely sculptured; length of malar space equal to basal width of mandible; length of eye in dorsal view 1.6 × length of temple (Fig. 28A)............................................ B. (T.) sculptilis sp. nov.
- Antenna of ♀ with 19 antennomeres; posterior half of notauli comparatively wide and coarsely crenulate; mesosoma yellowish-brown; posterior half of pronotal side and precoxal area largely smooth; length of malar space 0.7 × basal width of mandible; length of ♀ in dorsal view 2.2 × length of temple (Fig. 18A)................................. B. (T.) frontalis sp. nov.
4 Notauli moderately wide and distinctly crenulate; head and mesosoma completely yellow or yellowish-brown; length of ovipositor sheath 0.23 × length of fore wing; body yellow................................ B. (T.) hainanensis sp. nov.
- Notauli narrow and at most finely crenulate; head and mesosoma completely dark reddish-brown or brownish-black; length of ovipositor sheath 0.23–0.28 × length of fore wing; body brown or dark brown..................................... 5
5 First tergite parallel-sided and its basal third partly sculptured; length of ovipositor sheath 0.27–0.28 × length of fore wing; antenna of ♀ with 19 antennomeres; vein 3-CU1 of fore wing slightly curved; hind femur parallel-sided; pronotal side with less striae ventrally.......................................................... B. (T.) achterbergi Haeselbarth,1976
- First tergite slightly widened posteriorly and its basal third largely smooth (except for dorsal carinae); length of ovipositor sheath about 0.23 × length of fore wing; antenna of ♀ with 20 antennomeres; vein 3-CU1 of fore wing distinctly curved; hind femur widened apically; pronotal side with more striae ventrally............................. B. (T.) adelphius sp. nov.
6 Lamelliform carina of middle lobe of mesoscutum subvertical and very strong (Fig. 16E); occipital carina widely interrupted medio-dorsally; vein r of fore wing strongly oblique (Fig. 16F); length of ovipositor sheath 0.3–0.4 × length of fore wing (Fig. 15).................................................................... B. (T.) bicolor van Achterberg, 1988
- Antero-lateral carinae or rugae of middle lobe of mesoscutum absent to moderately oblique and comparatively weak (Figs 6D, 8D, 10F, 14F, 20E, 24D, 30G, 34D), resulting in a reticulate (Fig. 26E), rugose or smooth area; occipital carina complete medio-dorsally, but interrupted in B. (T.) angichorus, wuyishanensis and soror; vein r of fore wing vertical to moderately oblique (Figs 6F, 8H, 10G, 12F, 14G, 20I, 24H, 26H, 30F, 32F, 34G); length of ovipositor sheath 0.13–0.39 × length of fore wing (Figs 5, 7, 9, 11, 13, 19, 23, 25, 29, 31, 33).......................................................................... 7
7 Vein 3-SR+SR1 of fore wing continuous with vein 2-SR (Fig. 376 in van Achterberg, 1988); vein 2-1A of fore wing intermediate; vein 3-CU1 of fore wing subhorizontal (Fig. 376 in van Achterberg, 1988); second metasomal tergite largely costate; length of third antennomere of ♀ 5.8 × its width; length of ovipositor sheath 0.13 × length of fore wing..... B. (T.) votrus Papp, 1985
- Vein 3-SR+SR1 of fore wing normal, discontinuous with vein 2-SR (Figs 6F, 8H, 10G, 12H, 14G, 20I, 24H, 26H, 30F, 32F, 34G); vein 2-1A of fore wing distinct and at least its basal half sclerotised (Figs 6F, 8H, 10G, 12H, 14G, 20I, 24H, 26H, 30F, 32F, 34G); vein 3-CU1 of fore wing usually distinctly curved (Figs 6F, 8H, 10G, 12H, 14G, 20I, 24H, 26H, 30F, 34G), except B. (T.) tanae (Fig. 32F); second tergite frequently distinctly sculptured (Fig. 32E); length of third antennomeres of ♀ 5.8–7.2 × its width; length of ovipositor sheath 0.14–0.39 × length of fore wing............................................ 8
8 Length of ovipositor sheath 0.13–0.18 × fore wing and 0.6–1.0 × as long as first metasomal tergite; first discal cell of fore wing widely truncate anteriorly (but narrowly in B. (T.) apicalis); first tergite 2.6–3.1 × longer than its apical width (but 2.1–2.3 × in B. (T.) apicalis) and slightly widened posteriorly (but nearly parallel-sided in B. (T.) reticulatus)....................... 9
- Length of ovipositor sheath 0.22–0.37 × fore wing and 1.1–1.8 × longer than first tergite; if intermediate then first discal cell of fore wing narrowly truncate or acute anteriorly; first tergite 2.0–2.6 × longer than its apical width and widened posteriorly.. 12
9 Fore tarsal claw of ♀ with short blackish bristles; first metasomal tergite 2.6–3.1 × longer than its apical width and nearly parallel-sided posteriorly; antenna of ♀ with 6 apical antennomeres brown; length of fore wing 1.9–2.4 mm ............ 10
- Fore tarsal claw of ♀ simple, yellowish setose; first tergite 2.1–2.5 × longer than its apical width and widened posteriorly; antenna of ♀ with 6 apical antennomeres yellowish white or dark brown; length of fore wing 1.5–2.2 mm .............. 11
10 Antero-lateral area of middle mesoscutal lobe reticulate-rugose; head and mesosoma similarly dark brown; notauli narrow and spaced crenulate; apical half of antenna of ♀ brown, including apical antennomere............. B. (T.) reticulatus sp. nov.
- Antero-lateral area of middle mesoscutal lobe largely smooth, except some short fine carinae; head paler than mesosoma; notauli moderately wide and densely crenulate; apical half of antenna of ♀ pale brown or yellow, except for dark brown apical antennomere......................................................................... B. (T.) tanae sp. nov.
11 Antenna of ♀ tricoloured (6 apical antennomeres yellowish white, 10 middle antennomeres more or less brown and 4 basal antennomeres yellowish); length of fore wing 1.5–1.7 mm ....................... B. (T.) apicalis van Achterberg, 1976
- Antenna of ♀ bicoloured (mainly dark brown, but basal antennomeres yellow); length of fore wing 1.7–2.3 mm .............................................................................. B. (T.) albiventris van Achterberg, 1988
12 First discal cell of fore wing wide anteriorly, distinctly truncate (Fig. 30F) and middle lobe of mesoscutum antero-laterally with some carinae or rugae; occipital carina absent medio-dorsally; clypeus and face medially similarly coloured; vein r of fore wing oblique................................................................. B. (T.) soror van Achterberg, 1988
- First discal cell of fore wing comparatively narrow anteriorly (Figs 8H, 10G, 14G, 20I, 24H, 34G); if intermediate then middle lobe of mesoscutum antero-laterally without carinae or rugae, occipital carina complete, clypeus paler than face medially and/or vein r of fore wing vertical............................................................................. 13
13 Fore claw of ♀ with rather conspicuous blackish bristles (Fig. 1152 in van Achterberg, 1988) and mesosoma and first metasomal tergite reddish brown, contrasting with dark brown or blackish dorsal part of head................................................................................................... B. (T.) nigrocephalus van Achterberg, 1988
- Fore claw of ♀ with less conspicuous dark brownish or dark yellow bristles or only with setae (but blackish in B. (T.) gilvus and wuyishanensis); mesosoma and first tergite darker or similarly coloured as head dorsally............................ 14
14 Pterostigma dark brown and 13th–17th antennal antennomeres of ♀ paler than 5th–12th antennomeres; length of fore wing 2.1–2.3 mm; antenna of ♀ somewhat longer than fore wing and antennomeres comparatively slender (Fig. 10C); face yellowish and similarly coloured as clypeus......................................... B. (T.) antennalis van Achterberg, 1988
- Pterostigma brown or yellowish, if dark brown (B. (T.) wuyishanensis) then 13th–17th antennal antennomeres of ♀ similarly coloured as 5th–12th antennomeres or darker; length of fore wing 1.6–1.9 mm, if longer (B. (T.) artomandibularis) than antenna of ♀ somewhat shorter than fore wing, its antennomeres less slender (Figs 8, 14C, 20C, 24C, 34C) and face brown, contrasting with yellowish clypeus................................................................................ 15
15 Occipital carina weak but complete medio-dorsally (but absent medio-dorsally in B. (T.) artomandibularis); pterostigma largely yellowish brown or brown; apical half of antenna of ♀ mainly yellowish, but apical antennomeres more or less brown; head anteriorly (except for yellowish clypeus) reddish brown...................................................... 16
- Occipital carina narrowly interrupted medio-dorsally; pterostigma rather dark brown; apical half of antenna of ♀ brown; head anteriorly (including clypeus) yellowish brown............................................................. 18
16 Vein r of fore wing vertical; pterostigma pale yellow; occipital carina absent medio-dorsally antenna of female yellow medially; hypopygium brownish; setose part of ovipositor sheath 0.27–0.39 × length of fore wing........................................................................................... B. (T.) artomandibularis van Achterberg, 1976
- Vein r of fore wing oblique; occipital carina weak but complete medio-dorsally; pterostigma pale brown to dark brown; antenna of female brown medially, if yellow then setose part of ovipositor sheath 0.22 × length of fore wing................... 17
17 Hypopygium pale yellow; antenna of female brown medially; first metasomal tergite distinctly widened apically (Fig. 20G); setose part of ovipositor sheath 0.30–0.38 × length of fore wing................................ B. (T.) gilvus sp. nov.
- Hypopygium rather infuscated brownish; antenna of female yellowish or brownish medially; first metasomal tergite nearly parallel-sided (Fig. 26F); setose part of ovipositor sheath 0.22–0.27 × length of fore wing........... B. (T.) parilis sp. nov.
18 Penultimate antennal antennomere of ♀ 3.0–3.4 times longer than wide (Fig. 8C); vein r of fore wing oblique; apical quarter of antenna of ♀ dark brown and remainder yellowish or largely so................ B. (T.) angichorus van Achterberg, 1988
- Length of penultimate antennal antennomere of ♀ about twice its width (Fig. 34C); vein r of fore wing vertical; antenna of ♀ largely brown except yellow basal antennomeres..................................... B. (T.) wuyishanensis sp. nov.
description: Published as part of Lu, Qian-Yu, Chai, Hong-Fei, Achterberg, Cornelis Van, Tang, Pu & Chen, Xue-Xin, 2024, Review of the subgenus Tarpheion of the genus Blacus Nees (Hymenoptera, Braconidae, Brachistinae) from China, with description of nine new species and eight new records, pp. 297-335 in Zootaxa 5406 (2) on pages 298-299, DOI: 10.11646/zootaxa.5406.2.5, http://zenodo.org/record/10618330