shapeBody length ♀ 3.3 mm [T17][T14], ♂ 3.2 mm [T14].
colorThe body is black, uniformly not roughly sculpted, matt [T17].
head
shapeHead 1.2 times as wide as mesonotum, rectilinearly narrowed behind eyes; head width 2.2 times its length and 1.3 times its height. Length of temples equal to transverse diameter of eye. Length of base of ocellar triangle equal to OOL plus diameter of ocellus. POL 2.5 times ocellus diameter. Longitudinal diameter of eye 1.5 times transverse diameter, 1.7 times height of malar space. Face width 2.2 times its height, 1.5 times longitudinal diameter of eye. The proboscis is poorly developed. Maxillary palps equal to height of face with clypeus [T17][T14].The distance between the tentorial fossa is slightly greater than the distance from the tentorial fossa to the eye (11: 9). Face in upper third with weak median carina [T17].
sculptureThe face and vertex of the head behind the ocelli have weak and numerous transverse rugae; the temples have the same vertical rugae [T17][T14].
color
antenna
shape ♀Antennae slightly longer than head and mesosoma, thin; length of 3rd segment 3 times, 8th segment.2 times, the two apical segments slightly longer than their width; 7 apical segments deeply depressed, apical laterally compressed [T17]. Antennae equal to the total length of the head and mesosoma; 3rd antennal segment 3 times its width, 8th segment twice, two apical segments slightly larger than their width. The segments in the apical half of the antennae are flattened [T14].
shape ♂Antennae 21-segmented [T21][T14].
color
mesosoma
shapemesosoma length 1.5 times its height; propodeum with distinct transverse carina and well developed lateral teeth [T17][T14].
sculptureMesonotum before scutellum with slightly coarser and short rugae, scutellum with smooth sculpture, shining [T17][T14].
color
legs
shapeHind femur 4 times as long as wide; inner spur of hind tibia equal to half of 4th segment of hind tarsus; hind tarsus? and tibiae of equal length; 5th segment of hind tarsus slightly less than 2nd, more than 3rd [T17]. Hind femur 4 times as long as wide. The hind tibia is equal to the hind tarsus. ♂ Tarsus very thin, 5th segment of hind tarsus shorter than 3rd, almost half as long as 2nd. Hind femur 4 times as long as wide [T14].
sculpture
colorApices of femora and tibiae yellowish brown, apices of hind tibiae and tarsi of all legs darkened [T14]. The hind tibia are almost entirely brownish-yellow, except for brown apex [T21].
wings
shape1-R1 much shorter than the pterostigma (3:5). Marginal cell is almost twice as large as the 2nd submarginal cell. 3-SR shorter than r, 3-SR 4 times shorter than SR1, which is curved outward. Vein cu-a as long as 1-CU1 [T17]. 1-R1 is half as long as the pterostigma. SR1 is curved outward. ♂ SR1 uniformly curved [T14].
colorThe wings are darkened [T17][T14]. The wings in basal half almost glassy light [T21].
metasoma
shapeMetasoma slightly more narrowed towards apex than towards base, apically not bent forward. Its length 1.9 times its width, 3 times its maximum height (in apical third of metasoma). ♂: The length of the metasoma is twice its width [T14].
sculptureMetasoma with rather coarse and anastomosing longitudinal rugae, almost reaching its apex [T17][T14].
color
♀ ovipositorOvipositor thin, projecting beyond the apex of the metasoma by the total length of the 2nd and 3rd segments of the hind tarsus [T17][T14].
♂ apertureAperture large, 3.5 times as wide as high, 0.4 times as wide as metasoma[ T14]. The median process of the apical abdominal foramen is massive triangular (fig 10, 11) [T21].
Близок к M. rimulosus Thoms., от которого отличается короткой радиальной ячейкой переднего крыла (у M. rimulosus ее передний край равен длине птеростигмы), более широким лицом, менее вытяну тыми глазами и сильнее развитыми щеками (у M. rimuiosus продольный диаметр глаза в 1.8 раза больше поперечного и в 2.5 раза больше высоты щеки), прямолинейно суженной за глазами голоВой, отсутствием желтоватой перевязи посредине задней голени.
Самка. Длина тела 3.3 мм. Голова в 1.2 раза шире среднеспинки, за глазами прямолинейно суженная; ее ширина в 2.2 раза больше длины, в 1.3 раза больше высоты; виски по длине равны глазу. Основание глазкового треугольника на диаметр глазка больше расстояния от него до глаза; расстояние между задними глазками в 2.5 раза больше диаметра глазка. Продольный диаметр глаза в 1.5 раза больше поперечного, в 1.7 раза больше высоты щеки. Лицо в верхней трети со слабым срединным килем, его ширина в 2.2 раза больше высоты, в 1.5 раза больше продольного диаметра глаза; расстояние между тенториальными ямками немного больше расстояния от тенториальной ямки до глаза (11 : 9). Хоботок слабо развит; длина челюстных щупиков равна высоте лица с наличником. Усики немного длиннее головы и груди, тонкие; длина І-го членика в 3,6-го в 2 раза, двух предвершинных немного больше их ширины; 7 предвершинных члеников глубоко вдавленные, вершинный сдавлен с боков, длина іруди в 1.5 раза больше ее высоты; проподеум с явственным поперечным валиком и хорошо развитыми боковыми зубцами. Передний край радиальной ячейки значительно короче птеростигмы (3 ; 5), эта ячейка почти вдвое больше 2-й радиомедиальной. 2-й отрезок радиальной жилки короче І-го, в 4 раза короче 3-го, который выгнут наружу; нервулюс отодвинут от базальной жилки на свою длину. Длина заднего бедра в 4 раза больше его ширины; внутренняя шпора задней голени равна половине 4-го членика задней лапки; задние лапки и голени равной длины; 5-й членик задней лапки немного меньше 2-го, больше 3-го. Брюшко к вершине сужено немного сильнее, чем к основанію, на вершине снизу не подогнуто; его длина в 1.9 раза больше ширины, в 3 раза больше его наибольшей высоты (в вершинной трети брюшка). Яйцеклад тонкий, выступает на длину 2-го и 3-го члеников задней лапки, вместе взятых.
Тело равномерно негрубо скульптированное, матовое. Темя и лицо в слабых многочисленных поперечных складках, виски в таких не вертикальных складках. Складки на груди перед щитиком немного более сильные, короткие; щитик со сглаженной скульптурой, блестящий. Брюшко в грубых анастомозирующих продольных складках, почти достигающих его вершины.
Окраска черная. Вершины бедер и голени желтовато-коричневые; вершины задних голеней и лапки рсех ног затемненные. Крылья заметно затемненные.
Голотип: ♀, Хубсугульский аймак, р.Идэр у Жаргаланта, 19-20 VII 1975 (М.Козлов).
Data used in the multi-access key
These data are collected from the species descriptions and redescriptions, from published figures and photographs and from own measureements and observations. For a description of the different variables and value classes see this pdf.
morphology
basic information
female
male
body length (mm):
(3) 3 - 3.5 (3.6)
(3) 3 - 3.5 (3.6)
number of antennal segments:
16
(20) 20 (22)
head, dorsal view
Head width : length
wide
wide
Temples narrowing - widening
narrowing
narrowing
Eye length : temple length
1.0 - 1.25, > 1.25
1.0 - 1.25, > 1.25
Roundness temple
medium, weak, very weak
medium, weak, very weak
POL : OD
2 - 3
2 - 3
Ocellar triangle shape
very wide
very wide
Excavation of head
> 35%
> 35%
head, lateral view
Head height : length
long, very long
long, very long
Eye height : length
very short, short
very short, short
Temple length : eye length
very short, short
very short, short
head, frontal view
Head width : height
narrow, wide
narrow, wide
Face width : height
very wide
very wide
Eyes converging ventrally
about parallel, distinctly diverging
about parallel, distinctly diverging
EH : MSL
very short, short
very short, short
Clypeus width : height
semicircular, transverse
semicircular, transverse
Clypeus extending above bottom of eyes
far below
far below
Tentorial pits
very small, small
very small, small
Shape of lower margin clypeus
convex
convex
antennae
Antennal shape
clearly widened
filiform, not widened
Segment 3 length : width
medium
---
Penultimate segment length : width
short
---
Length of antenna : length of body
2: short, 3: long
---
mesosoma, lateral view
Length : height
medium
medium
transverse carina
well developed
well developed
lateral teeth
well developed
well developed
mesosoma, ventral view
Prepectal carina lamelliform
indistinct
indistinct
legs
Hind femur length : width ratio
long
long
Hind tibia length : hind tarsus length ratio
medium
medium
Hind tibia (longest) spur length : metatars length ratio
wings
Vein 1-R1 length : pterostigma length
short, medium
short, medium
Vein r length : vein 3-SR length
short
short
Shape vein SR1 (straight / concave / convex)
convex
convex
S-shape vein SR1
not S-shaped
not S-shaped
cell M : cell Sm2
Sm2 medium
Sm2 medium
Pterostigma length : width ratio
long
long
Angle between radial vein (r) : vein 1-R1
medium, blunt
medium, blunt
metasoma, dorsal view
Length : width ratio of metasoma
medium, long
medium, long
Shape of metasoma
narrowing to apex, widest in middle
narrowing to apex, widest in middle, widest towards apex
metasoma, lateral view
Length : height ratio of metasoma
medium
medium
posterior : anterior height ratio of metasoma
small, medium
small, medium
Position of maximum height
medium-posterior, posterior
posterior
metasoma, ventral view
Metasoma posteriorly curved forwards
(almost) not incurved
(almost) not incurved
male apical aperture
Aperture width : metasoma width
no aperture
medium
Aperture shape
n. a.
oval
Median process shape
n. a.
horizontal, nearly round, horizontal oval
sculpture
head
general coarseness
fine
fine
clypeus
coarseness punctation
---
---
density punctation
---
---
face
sculpture type
rugose
rugose
sculpture direction
transverse
transverse
vertex and temple
sculpture type
transverse rugulose
transverse rugulose
mesonotum
sculpture type
---
---
scutellum
middle
smooth
smooth
lateral
---
---
metasoma
base - mid sculpture
longitudinally rugose / rugose-striate
longitudinally rugose / rugose-striate
sculpture at apex
rugose, rugulose
rugose, rugulose
coarse / fine boundary
apex (>70%)
apex (>70%)
color
head
mandibles color pattern
---
---
palpi, lightest color
---
---
antennae
scapus, lightest color
black, dark brown
black, dark brown
segment 3 and 4, lightest color
black, dark brown
black, dark brown
legs
fore coxae lightest colour
dark
dark
fore femur lightest colour
medium light
medium light
fore femur color pattern
tip light
tip light
hind femur lightest colour
medium light
medium light
hind femur color pattern
tip light
tip light
hind tibia lightest colour
medium light
medium light
hind tibia color pattern
wide light base
wide light base
hind basitarsus lightest colour
dark
dark
hind tarsus segment 2-3 lightest colour
dark
dark
wings
middle veins lightest colour
medium dark
medium dark
basal veins lightest colour
medium light, light
medium light, light
metasoma
metasoma colour pattern
entirely dark
entirely dark
metasoma lightest colour
dark
dark
metasoma base, colour pattern
entirely dark
entirely dark
metasoma base, light spots
n.a.
n.a.
metasoma base, light band
n.a.
n.a.
Chelonus dolosus in published keys
T2: Tobias 2008
Palaearctic species of the Microchelonus retusus group (Hymenoptera, Braconidae, Cheloninae). Entmol. Rev. 88, 1171–1191
T14: Tobias, 2010
Palearctic species of Microchelonus Szépligeti (Hymenoptera: Braconidae, Cheloninae): key to species.