Chelonus (Microchelonus) Szepligeti 1908, s. str.
Creators: name: Zhou, Jin-Jin
name: Achterberg, Cornelis Van
name: Tang, Pu
name: Chen, Xue-Xin
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Chelonus

description: Subgenus Microchelonus Szépligeti, 1908 s. str.
Diagnosis. Body small-sized; head transverse; antennomeres of female 16; eye sparsely setose; frons and vertex striate-rugose; face flat, striate-rugose to reticulate-rugose; clypeus often finely punctate, with distinct setosity and shiny; mesoscutum and scutellum evenly convex; propodeum coarsely rugose; vein 1-SR+M of fore wing absent; hind coxa, femur and apex of tibia robust; metasomal carapace of male with medium-sized apical opening, carapace apically usually rounded in dorsal view, rarely narrowed posteriorly.
Biology. Parasitoids of Argyresthiidae, Batrachedridae, Blastobasidae, Coleophoridae, Cosmopterigidae, Gelechiidae, Momphidae, Noctuidae, Pyralidae, Sesiidae, Tortricidae, and Yponomeutidae. (Yu et al. 2016).
Distribution. Worldwide (Yu et al. 2016).
Notes. One species reported from China is actually a junior homonym and, therefore, here renamed: Chelonus (Microchelonus) jiae nom. nov. for C. (M.) bimaculatus (Chen & Ji, 2003) not C. bimaculatus Szépligeti, 1896 or C. bimaculatus Ivanov, 1899. A second species, C. (M.) tobiasi (Yuldashev, 2011) is a junior synonym of C. (M.) tobiasi (Zhang, Shi, He & Chen, 2008), and, therefore, here renamed to C. (M.) substernatus nom. nov.
Key to species of subgenus Microchelonus Szépligeti from China
1 Females; [unknown of C. scirpophagae, but in other species, the face is either smooth and very shiny (Fig. 72G) or very finely reticulate-rugose and with satin sheen].................................................................... 2
- Males............................................................................................. 41
2 Body reddish brown (Fig. 69); [penultimate antennomere rather slender, 3.0 × its width (Fig. 70H); parastigma yellowish (Fig. 70A).......................................................................... C. (M.) ruficorpus sp. nov.
- Body black or dark brown (Figs 5, 9, 15, 19, 29, 45).......................................................... 3
3 Apical margin of clypeus with two teeth (Fig. 46F); [posterior excavation of head very deep (> 35%); temples strongly narrowed behind eyes in dorsal view (Fig. 46G)]........................................ C. (M.) lukasi van Achterberg, 2004
- Apical margin of clypeus without teeth, convex, truncate or sinuous (Figs 6G, 10G, 16G, 20F, 30F, 56F, 66F)............ 4
4 Apex of metasomal carapace with a large median protuberance in posterior view (Fig. 16F); [pterostigma large and slightly protruding, its length 2.2 × width]..................................................... C. (M.) bullatus sp. nov.
- Apex of metasomal carapace without protuberance........................................................... 5
5 Metasomal carapace in lateral view medio-posteriorly with a depression (Fig. 66D); [vein SR1 of fore wing slightly curved outwards (Fig. 66A)]............................................................... C. (M.) recavus sp. nov.
- Metasomal carapace in lateral view rounded or slightly truncate (Figs 6D, 10D, 20D, 30D, 56D)...................... 6
6 Metasomal carapace in lateral view posteriorly bag-like, apex of carapace distinctly incurved ventrally (Fig. 56D); [vein r of fore wing curved (Fig. 56A); eyes rather converging ventrally (Fig. 56F)].................. C. (M.) milkoi (Tobias, 2003)
- Carapace less bag-like posteriorly and apex usually less incurved (Figs 6D, 10D, 20D, 30D).......................... 7
7 Metasomal carapace medio-apically shallowly emarginate in posterior view; [legs brownish yellow, only apices of hind tibia and 5 th segment of all tarsi are dark-coloured.].................................. C. (M.) elegantulus (Tobias, 1986).
- Metasomal carapace without apically emargination in posterior view............................................ 8
8 Apex of metasomal carapace with a longitudinal depression ventrally (Figs 111F, 113F)............................. 9
- Apex of metasomal carapace without depression ventrally.................................................... 10
9 Legs almost entirely light yellow (Fig. 110); no protrusion under postero-ventral depression of carapace (Fig. 111F); metasomal carapace irregularly and coarsely reticulate-rugose (Fig. 111E)............. C. (M.) rhagius Zhang, Shi, He & Chen, 2008
- Most of legs dark brown (Fig. 112); a small protrusion present under postero-ventral depression of caarapace (Fig. 113F); metasomal carapace rather coarsely reticulate-rugose (Fig. 113E)............ C. (M.) tobiasi Zhang, Shi, He & Chen, 2008
10 Metasomal carapace in dorsal view more narrowed to apex, width at 3/4 of carapace: width at 1/4 of carapace <0.95 × (Figs 20E, 30E).......................................................................................... 11
- Metasomal carapace in dorsal view less narrowed apically, widest at or behind middle of carapace (Figs 6E, 10E, 12E, 34E). .................................................................................................. 13
11 Mesosoma short in lateral view, its length only 1.2 × its height; [with smoothed sculpture on narrowed part of carapace, shiny]...................................................................... C. (M.) volgensis Tobias, 1986
- Mesosoma rather long in lateral view, length> 1.2 × its height (Figs 20B, 30B)................................... 12
12 Vein r of fore wing longer than vein 3-SR; length of marginal cell 1.2 × its width (Fig. 20A); posterior excavation of head deep (Fig. 20G); middle part of scutellum densely punctate (Fig. 20C).............................. C. (M.) clivus sp. nov.
- Vein r of fore wing shorter than vein 3-SR; length of marginal cell 1.75 × its width (Fig. 30A); posterior excavation of head shallow (Fig. 30G); middle part of scutellum smooth (Fig. 30C)............................. C. (M.) erugatus sp. nov.
13 Carapace tapering from apex to base in dorsal view, width at 3/4 of carapace: width at 1/4 of carapace> 1.15 × in dorsal view (Figs 12E, 34E)...................................................................................... 14
- Metasomal carapace in dorsal view gradually widened, width at 3/4 of metasoma: width at 1/4 of metasoma 0.95–1.15 × (Figs 6E, 10E, 42E, 52E, 58E, 86E).......................................................................... 15
14 Length of apex and penultimate antennomeres 1.5 × and 0.9 × their width, respectively (Fig. 12H); vein 3-SR of fore wing oblique, almost in line with vein r; fore wing entirely dark brown, opaque (Fig. 12A)....... C. (M.) alveatus (Tobias, 1989)
- Apex of flagellum and penultimate segment rather long, 4.0 × and 3.0 × their width, respectively (Fig. 34H); vein r of fore wing forms an angle with 3-SR and vein 3-SR nearly horizontal (Fig. 34A).................. C. (M.) flagellaris (Tobias, 1989)
15 Vein 1-R1 of fore wing 0.5 × pterostigma, length of marginal cell 1.2–1.3 × width (Figs 58A, 86A)................... 16
- Vein 1-R1 of fore wing longer than 0.5 × pterostigma (Figs 6A, 10A, 42A, 52A).................................. 18
16 Legs reddish-yellow and scapus yellowish; apical margin of clypeus truncate......... C. (M.) chryspedes (Ji & Chen, 2003)
- Legs and scapus all dark (Figs 57, 58F); apical margin of clypeus convex (Figs 58F, 86F)........................... 17
17 Vein r of fore wing distinctly curved (Fig. 86A); temples widened behind eyes in dorsal view (Fig. 86G)............................................................................................. C. (M.) zaitzevi (Tobias, 1972)
- Vein r straight (Fig. 58A); temples strongly narrowed behind eyes in dorsal view (Fig. 58G)................................................................................................... C. (M.) moskovitus (Tobias, 1997)
18 Temple strongly narrowed behind eyes (Figs 42G, 52G)...................................................... 19
- Temple almost parallel-sided behind eyes (Figs 6G, 10G, 14G, 38G, 50G, 62G, 74G, 78G).......................... 20
19 Fore wing entirely dark brown, opaque and parastigma yellowish (Fig. 42A); ventral margin of clypeus convex (Fig. 42F)................................................................................. C. (M.) linzhiensis sp. nov.
- Fore wing semitransparent and parastigma dark brown (Fig. 52A); ventral margin of clypeus truncate (Fig. 52F).................................................................................... C. (M.) melanochromus sp. nov.
20 Basal half of antennomeres yellow and more distal antennomeres brown (Figs 14I, 78I)............................ 21
- All antennomeres brown or dark brown (Figs 6H, 10I, 14I, 38H, 50H, 62H, 74H)................................. 23
21 Metasomal carapace in lateral view rounded (Fig. 78D); [vein r of fore wing longer than vein 3-SR; vein SR1 straight (Fig. 78A)]......................................................................... C. (M.) staurorhytis sp. nov.
- Metasomal carapace in lateral view slightly truncate (Fig. 14D)................................................ 22
22 Vein SR1 of fore wing straight; lateral teeth of propodeum distinct and strong.... C. (M.) daanyuanensis (Chen & Ji, 2003)
- Vein SR1 curved outwards (Fig. 14A); lateral teeth of propodeum weak and small (Fig. 14C)................................................................................................... C. (M.) brachykeraiatus sp. nov.
23 Vein r of fore wing longer than vein 3-SR (Fig. 74A)........................................................ 24
- Vein r of fore wing shorter than vein 3-SR (Figs 10A, 50A) or about as long (Figs 6A, 38A, 62A).................... 26
24 Vein r of fore wing distinctly thickened (Fig. 74A); [legs and scapus all dark brown or blackish (Figs 73, 74E)].................................................................................... C. (M.) semilunaris (Tobias, 2000)
- Vein r of fore wing not thickened........................................................................ 25
25 OOL as long as POL, median ocellus almost in line with lateral ocelli; legs dark brown.... C. (M.) equalis (Chen & Ji, 2003)
- OOL more or less longer than POL, ocelli forming a distinct triangle; legs pale... C. (M.) longidiastemus (Ji & Chen, 2003)
26 Apical margin of clypeus sinuous, shallowly excised medially and slightly protruding (Figs 6F, 62F).................. 27
- Apical margin of clypeus convex or truncate and distinctly protruding ventrally (Figs 10F, 38F, 50F).................. 28
27 Frons coarsely striate-rugose (Fig. 6G); parastigma yellowish (Fig. 6A)...................... C. (M.) adiazetos sp. nov.
- Frons finely striate-rugose (Fig. 62G); parastigma dark brown (Fig. 62A)..................... C. (M.) platyetrus sp. nov.
28 Vein r of fore wing curved (Figs 10A, 38A, 50A)........................................................... 29
- Vein r of fore wing straight............................................................................. 32
29 Base of metasomal carapace with oblique rugae.................................. C. (M.) obliquis (Ji & Chen, 2003)
- Base of metasomal carapace longitudinally rugose.......................................................... 30
30 Parastigma and scapus dark brown (Fig. 38F)..................................... C. (M.) insidiatrix (Tobias, 1989)
- Parastigma and scapus pale, yellowish brown (Figs 10F, 50F)................................................. 31
31 Posterior excavation of head deep (Fig. 10G); apical margin of clypeus convex medio-ventrally (Fig. 10F)........................................................................................ C. (M.) alticinctus (Tobias, 1989)
- Posterior excavation of head shallow (Fig. 50F); apical margin of clypeus truncate medio-ventrally (Fig. 50F); [base of metasomal carapace with a yellow band and a yellow spot at middle (Fig. 50E)]........... C. (M.) maculovittatus sp. nov.
32 Vein 3-SR of fore wing oblique, almost in line with vein r.................................................... 33
- Vein r of fore wing forms an angle with vein 3-SR and vein 3-SR nearly horizontal................................ 36
33 Base of metasomal carapace with a yellow band and apical 3/5 reddish brown........ C. (M.) alternator (Ji & Chen, 2003)
- Apical 3/5 of carapace black........................................................................... 34
34 Frons smooth; 3 rd and penultimate antennomeres 5.0 × and 2.0 × their width, respectively.................................................................................................. C. (M.) glabrifrons (Chen & Ji, 2003)
- Frons striate-rugose; length of 3 rd and penultimate antennomeres <4.0 × and <1.5 × its width, respectively............. 35
35 Apical margin of clypeus sinuous; lateral teeth of propodeum weak and small; carapace entirely black.......................................................................................... C. (M.) jilinensis (Chen & Ji, 2003)
- Apical margin of clypeus truncate; lateral teeth of propodeum distinct and strong; base of metasomal carapace with a yellow medial spot............................................................. C. (M.) fujianensis (Ji & Chen, 2003)
36 Hind femur densely and long setose........................................... C. (M.) longihair (Chen & Ji, 2003)
- Hind femur rather sparsely setose....................................................................... 37
37 Vein r of fore wing, 0.5 × as long as vein 3-SR................................. C. (M.) breviradis (Chen & Ji, 2003)
- Vein r slightly shorter than vein 3-SR or of equal length...................................................... 38
38 Apical margin of clypeus truncate; fore wing entirely dark brown, opaque........ C. (M.) pectinophorae (Cushman, 1931)
- Apical margin of clypeus convex; fore wing semitransparent.................................................. 39
39 Palpi black; [metasomal carapace with an irregularly edged yellow band]............ C. (M.) nigripalpis (Chen & Ji, 2003)
- Palpi yellowish or yellowish brown...................................................................... 40
40 Vein SR1 of fore wing curved; carapace with a yellow medial spot basally............... C. (M.) chinensis (Zhang, 1984)
- Vein SR1 of fore wing straight; metasomal carapace entirely black...................... C. (M.) rokkina (Sonan, 1932)
41 Face either smooth and very shiny (Fig. 72G) or very finely reticulate-rugose and with satin sheen; apical aperture in posterior view very large and 2.4 × wider than high, elongate, broadly slit-shaped, in lateral view wide triangular up to apical 1/4 metasoma (Fig. 72D)........................................................... C. (M.) scirpophagae sp. nov.
- Face finely rugose and with satin sheen (Figs 8G, 26G, 28H, 36G); apical aperture of metasoma in lateral view hardly or not visible (Figs 8D, 26D, 28D, 36D)....................................................................... 42
42 Mesosoma slender in lateral view, its length 1.7–1.9 × height (Figs 8B, 36B); length of carapace in lateral view> 3.0 × its maximum height, rather flat (Figs 8D, 36D)............................................................... 43
- Mesosoma robust in lateral view, its length less than 1.5 × its height (Figs 26B, 28B, 40B, 44B); length of carapace in lateral view less than 3.0 × its maximum height, more or less widened posteriorly (Figs 26D, 28D, 40D, 44D)................ 44
43 Metasomal carapace in dorsal view slightly widened (Fig. 8E); ventral opening of carapace reaching apex of carapace (Fig. 8D).............................................................................. C. (M.) aequus sp. nov.
- Metasomal carapace in dorsal view parallel-sided (Fig. 36E); apex of carapace distinctly incurved ventrally (Fig. 36D)........................................................................................ C. (M.) illatus sp. nov.
44 Metasomal carapace in lateral view posteriorly rather bag-like, apex of carapace distinctly incurved ventrally (Fig. 28D); [apical aperture in posterior view, with parallel upper and lower edges, slit-shaped (Fig. 28G)]..... C. (M.) cyclotus sp. nov.
- Carapace less bag-like posteriorly and apex usually less incurved (Figs 26D, 40D, 44D, 48D)........................ 45
45 Apical margin of clypeus with two teeth (Fig. 48G); [apical aperture in posterior view reddish brown (Fig. 48F)]................................................................................. C. (M.) lukasi van Achterberg, 2004
- Apical margin of clypeus without teeth, convex, truncate or sinuous (Figs 18G, 26G, 40G, 44G)...................... 46
46 Apical aperture in posterior view elongate, slit-shaped (width: height ratio> 3.5 ×) (Figs 26F, 54F, 64F)............... 47
- Apical aperture in posterior view oval or round (width: height ratio <3.5 ×) (Figs 18F, 40F, 44F, 60F)................. 57
47 Parastigma and scapus black (Figs 54A, 54G); temple strongly narrowed behind eyes (Fig. 54H)................................................................................................ C. (M.) melanochromus sp. nov.
- Parastigma and scapus pale, yellowish brown or brown (Figs 26A, 26G, 64A, 64G); temple almost parallel-sided behind eyes (Figs 26H, 64H)..................................................................................... 48
48 Legs dark brown or black.............................................................................. 49
- Legs yellowish brown................................................................................. 52
49 Vein r of fore wing shorter than vein 3-SR................................................................. 50
- Vein r of fore wing as long as vein 3-SR.................................................................. 51
50 Metasomal carapace in dorsal view short and wide (Fig. 26E); posterior excavation of head shallow (Fig. 26H)........................................................................................ C. (M.) crassitibialis sp. nov.
- Metasomal carapace in dorsal view rather elongate (Fig. 64E); posterior excavation of head deep (Fig. 64H)............................................................................................. C. (M.) platyetrus sp. nov.
51 Vein SR1 of fore wing curved; carapace with a pair of yellowish lateral spots...... C. (M.) pectinophorae (Cushman, 1931)
- Vein SR1 of fore wing straight; carapace entirely black.............................. C. (M.) lunari (Chen & Ji, 2003)
52 Pterostigma 2.6 × longer than wide; apical margin of clypeus sinuous, shallowly excised medially.......................................................................................... C. (M.) cratospilumi (Ji & Chen, 2003)
- Pterostigma longer than 3.3 × its width; apical margin of clypeus convex or truncate................................ 3
53 Apical margin of clypeus sinuous, shallowly excised medially; [vein 3-SR of fore wing almost in line with vein r; length of 3 rd antennomere 4.0–4.3 × its width]............................................. C. (M.) jilinensis (Chen & Ji, 2003)
- Apical margin of clypeus truncate or convex............................................................... 54
54 Apical margin of clypeus truncate....................................................................... 55
- Apical margin of clypeus convex........................................................................ 56
55 Middle part of scutellum smooth and shiny; vein r of fore wing longer than vein 3-SR; length of 3 rd antennomere 3.5 × its width.................................................................. C. (M.) plainifacis (Chen & Ji, 2003)
- Middle part of scutellum rugose and matt; vein r of fore wing as long as 3-SR; length of 3 rd antennomere 2.9 × its width.......................................................................... C. (M.) amaculatus (Chen & Ji, 2003)
56 Lateral teeth of propodeum small and weak; penultimate antennomere 3.5 × its width; carapace entirely black................................................................................... C. (M.) alternator (Ji & Chen, 2003)
- Lateral teeth of propodeum distinct and strong; penultimate antennomere 1.7–2.0 × its width; carapace with a large yellow medial spot............................................................. C. (M.) fujianensis (Ji & Chen, 2003)
57 Vein 1-R1 distinctly shorter than pterostigma, 0.5–0.7 × pterostigma length (Figs 18A, 60A, 68A, 88A)................ 58
- Vein 1-R1 of fore wing slightly shorter or longer than pterostigma (Figs 22A, 32A, 40A, 44A, 76A, 80A, 82A, 84A)..... 63
58 Temples slightly widened behind eyes in dorsal view (Fig. 88H); apical margin of clypeus convex (Fig. 88G)......................................................................................... C. (M.) zaitzevi (Tobias, 1972)
- Temples parallel-sided or narrowed behind eyes in dorsal view (Figs 18H, 60H, 68H); apical margin of clypeus truncate (Figs 18G, 60G, 68G)..................................................................................... 59
59 Vein r of fore wing longer than vein 3-SR (Fig. 68A); posterior excavation of head deep (Fig. 68H). C. (M.) recavus sp. nov.
- Vein r of fore wing shorter (Fig. 18A) or as long as vein 3-SR (Fig. 60A); posterior excavation of head shallow (Figs 18H, 60H).............................................................................................. 60
60 Vein r of fore wing 0.5 × vein 3-SR; length of 3 rd antennomere 4.3 × its width........ C. (M.) breviradis (Ji & Chen, 2003)
- Vein 1-R1 of fore wing 0.9–1.0 × vein 3-SR; length of 3 rd antennomere <3.5 × its width (Figs 18A, 60A).............. 61
61 Legs yellowish to yellowish brown; metasomal carapace with u-shaped yellowish spot................................................................................................. C. (M.) longipedicellus (Ji & Chen, 2003)
- Legs black to dark brown (Figs 17, 59); carapace entirely black (Figs 18E, 60E).................................. 62
62 Parastigma of fore wing dark brown (Fig. 60A); temples distinctly narrowed behind eyes in dorsal view (Fig. 60H)................................................................................ C. (M.) moskovitus (Tobias, 1997)
- Parastigma of fore wing yellowish brown (Fig. 18A); temples parallel-sided behind eyes in dorsal view (Fig. 18H).................................................................................. C. (M.) calcaratus (Tobias, 1989)
63 Coxa and femora mainly black, blackish brown or brown (Figs 31, 39, 43, 75, 79, 81, 83)........................... 64
- Coxae and femora yellowish or reddish brown (only hind femur more or less darkened) (Fig. 21)..................... 75
64 Vein r of fore wing longer than vein 3-SR (Figs 76A, 82A)................................................... 65
- Vein r of fore wing about as long as vein 3-SR (Figs 32A, 40A, 44A, 80A, 84A).................................. 70
65 OOL as long as POL, median ocellus almost in line with lateral ocelli; carapace tapering from apex to base in dorsal view, width at 3/4 of carapace: width at 1/4 of carapace> 1.15 × in dorsal view.................... C. (M.) equalis (Chen & Ji, 2003)
- OOL more or less longer than POL, ocelli form a triangle (Figs 76H, 82H); metasomal carapace in dorsal view gradually widened, width at 3/4 of metasoma: width at 1/4 of metasoma 0.95–1.15 × (Figs 76E, 82E)......................... 66
66 Antenna filiform, length of 3 rd and penultimate antennomeres 3.5 × and 1.0 × their width, respectively; posterior excavation of head deep............................................................. C. (M.) concentralis (Chen & Ji, 2003)
- Antenna slightly widened medially, length of 3 rd and penultimate antennomeres <3.5 ×, <2.0 × its width (Fig. 76I); posterior excavation of head shallow (Figs 76H, 82H)............................................................... 67
67 Vein r of fore wing distinctly curved (Fig. 76A)............................................................ 68
- Vein r of fore wing straight (Fig. 82A).................................................................... 69
68 Veins r, 2-SR, 3-SR and 2-M conspicuously widened and swollen; apical margin of clypeus truncate......................................................................................... C. (M.) swellinervis (Chen & Ji, 2003)
- Veins r, 2-SR, 3-SR and 2-M of almost same width, not swollen (Fig. 76A); apical margin of clypeus convex (Fig. 76G)............................................................................ C. (M.) semilunaris (Tobias, 2000)
69 Parastigma dark brown; apical margin of clypeus convex (Fig. 82A)................... C. (M.) temporalis (Tobias, 1986)
- Parastigma yellowish; apical margin of clypeus truncate.......................... C. (M.) sinuosus (Ji & Chen, 2003)
70 Scapus yellowish (Fig. 80G)........................................................................... 71
- Scapus black or dark brown (Figs 32G, 40G, 44G, 84G)..................................................... 72
71 Apical margin of clypeus convex (Fig. 80G); posterior excavation of head deep (Fig. 80H)..... C. (M.) staurorhytis sp. nov.
- Apical margin of clypeus truncate; posterior excavation of head shallow......................... C. (M.) jiae nom. nov.
72 Apical aperture of metasoma in lateral view shallow (Fig. 44F); vein 3-SR of fore wing almost in line with vein r and oblique (Fig. 44A)...................................................................... C. (M.) linzhiensis sp. nov.
- Apical aperture of metasoma in lateral view rather wide and occupying 1/10 of metasoma (Figs 32D, 84D); vein r of fore wing forms an angle with 3-SR and vein 3-SR nearly horizontal (Figs 32A, 40A, 84A).................................. 73
73 Clypeus densely setose; apical margin of clypeus convex (Fig. 40G); metasoma in dorsal view less narrowed apically and widest in or behind middle of carapace (Fig. 40E).......................................... C. (M.) leious sp. nov.
- Clypeus hardly setose; apical margin of clypeus truncate (Figs 32G, 84G); metasoma in dorsal view distinctly narrowed subapically (Figs 32E, 84E)............................................................................ 74
74 Posterior excavation of head deep; temple almost parallel-sided behind eyes (Fig. 84H); middle part of scutellum densely punctate (Fig. 84C)............................................................. C. (M.) varus (Tobias, 2000)
- Posterior excavation of head shallow; temples widened behind eyes in dorsal view (Fig. 32H); middle part of scutellum smooth (Fig. 32C)........................................................................ C. (M.) erugatus sp. nov.
75 Vein r of fore wing distinctly curved (Fig. 22A)............................................................ 76
- Vein r of fore wing straight............................................................................. 80
76 Frons smooth; vein 3-SR of fore wing almost in line with vein r.................. C. (M.) glabrifrons (Chen & Ji, 2003)
- Frons striate-rugose (Fig. 22H); vein r of fore wing forms an angle with 3-SR (Fig. 22A)........................... 77
77 Vein r of fore wing longer than vein 3-SR (Fig. 22A); carapace in lateral view declivous posteriorly (Fig. 22D).............................................................................................. C. (M.) clivus sp. nov.
- Vein r of fore wing about as long as or shorter than vein 3-SR; carapace in lateral view more rounded posteriorly........ 78
78 Base of metasomal carapace with oblique rugae; carapace with pale yellowish basal band. C. (M.) obliquis (Ji & Chen, 2003)
- Vein r of fore wing about as long as or shorter than vein 3-SR; carapace in lateral view more rounded posteriorly; carapace with an medial spot or a pair of yellowish lateral spots........................................................... 79
79 Apical margin of clypeus convex; length of 3 rd antennomere about 3.6 × its width; lateral teeth of propodeum distinct and strong......................................................................................................................................................................... C. (M.) chinensis (Zhang, 1984)
- Apical margin of clypeus truncate; length of 3 rd antennomere about 5.3 × its width; lateral teeth of propodeum small and weak.................................................................. C. (M.) gladiclypis (Ji & Chen, 2003)
80 Apical margin of clypeus sinuous, shallowly excised medially; penultimate antennomere 3.5 ×its width.................................................................................. C. (M.) circulariforameni (Chen & Ji, 2003)
- Apical margin of clypeus truncate or convex; penultimate antennomere <2.0 × its width............................ 81
81 Length of 3 rd antennomere longer than 4.5 × its width........................................................ 82
- Length of 3 rd antennomere shorter than 4.0 × its width....................................................... 83
82 Temple strongly narrowed behind eyes; lateral teeth of propodeum small and weak...... C. (M.) elegantulus (Tobias, 1986)
- Temple parallel-sided behind eyes; lateral teeth of propodeum distinct and strong...... C. (M.) elongates (Ji & Chen, 2003)
83 Hind femur densely and long setose; apical aperture in posterior view reddish brown.... C. (M.) longihair (Chen & Ji, 2003)
- Hind femur rather smooth; apical aperture in posterior view black.............................................. 84
84 Apical margin of clypeus convex........................................................................ 85
- Apical margin of clypeus truncate....................................................................... 86
85 Lateral teeth of propodeum distinct and strong; vein SR1 of fore wing curved........ C. (M.) hubeiensis (Ji & Chen, 2003)
- Lateral teeth of propodeum small and weak; vein SR1 of fore wing straight............ C. (M.) sculptur (Chen &Ji, 2003)
86 Lateral teeth of propodeum small and weak; length of 3 rd and penultimate antennomeres 4.0 × and 2.0 × their width, respectively................................................................. C. (M.) holisi (Chen & Ji, 2003)
- Lateral teeth of propodeum distinct and strong; length of 3 rd and penultimate antennomeres shorter than 3.5 × and 1.8 × their width, respectively................................................................................... 87
87 Vein SR1 of fore wing curved.......................................................................... 88
- Vein SR1 of fore wing straight.......................................................................... 89
88 Temple strongly narrowed behind eyes; hind femur about 4.5 × longer than wide.......... C. (M.) volgensis (Tobias, 1986)
- Temple parallel-sided behind eyes; hind femur shorter than 4.0 × longer than wide... C. (M.) tianchiensis (Ji & Chen, 2003)
89 Carapace with a large yellow medial spot; middle part of scutellum smooth........ C. (M.) guadunensis (Ji & Chen, 2003)
- Carapace entirely black; middle part of scutellum densely punctate-rugose....................................... 90
90 Antennomeres of male 18; palpi yellowish; body length 2.5 mm ............................ C. (M.) jungi (Chu, 1936)
- Antennomeres of male 26; palpi black; body length 3.0 mm.......................... C. (M.) mushanus (Sonan, 1932)
description: Published as part of Zhou, Jin-Jin, Achterberg, Cornelis Van, Tang, Pu & Chen, Xue-Xin, 2024, A review of the subgenera Carinichelonus, Microchelonus, Parachelonus and Stylochelonus of the genus Chelonus Panzer (Braconidae: Cheloninae) with descriptions of twenty-one new species from China, pp. 1-127 in Zootaxa 5412 (1) on pages 9-14, DOI: 10.11646/zootaxa.5412.1.1, http://zenodo.org/record/10675974