shapeBase of ocellar triangle greater than distance from posterior ocellus to eye by as much as diameter of ocellus. Distance between posterior ocelli 3 times diameter of ocellus. Longitudinal diameter of eye twice height of cheek and 0.83 width of face. Width of face 1.5 times its height [T23] .The distance between the posterior ocelli is 3 times the ocelli diameter. The longitudinal diameter of the eye is twice the height of the genae, 0.8 times the width of the face, which is 1.5 times its height. ♂: Malar height 0.4 times the longitudinal diameter of the eye [T14]. The length of the temples is not more than the transverse diameter of the eye [T14, key].
sculptureClypeus punctate and shiny [T23]. The face and temples are finely sculptured [T14].
color
antenna
shape ♀Segments in apical part of antenna depressed [T23].
shape ♂Antennae 21-segmented [T23][T14].
colorThe antennae are dark-colored [T14].
mesosoma
shapeMesosoma length 1.5 times its height. Lateral teeth of propodeum widely rounded [T23][T14].
sculptureMesonotum irregularly rugose in front of scutellum, punctate on sides and in front, with smoothed sculpture, shining; scutellum smooth [T14].
color
legs
shapeHind femur 3.5 times as long as wide [T23][T14]. 5th hind tarsal segment as long as 2nd segment and longer than 3rd segment [T23].
sculpture
color♀: The legs (including the hind femora) are dark-colored; apices of fore and middle femora, fore tibia entirely and base of middle tibia yellowish brown [T23][T14]. ♂: Hind legs are completely dark brown [T14].
wings
shape♀ 1-R1 2/3 length of pterostigma, 3-SR half the length of r, 0.13 length of SR1, and 1/3 length of 2-SR. Radial vein runs almost vertically to longitudinal axis of pterostigma [T23]. 1-R1 0.7 times as long as pterostigma; 3-SR 0.5 times as long as r, 8 times shorter than SR1, 3 times shorter than 2-SR. ♂: The 1st segment of the radial vein forms a right angle with the longitudinal axis of the pterostigma and with 3-SR [T14]. The marginal cell is large, 3.5-4 times larger than the 2nd submarginal cell [T14, key ♂]
colorThe wings are slightly darkened [T23][T14], with brown pterostigma and veins, basal and mediocubital veins paler [T23].
metasoma
shapeMetasoma 1.85 times as long as wide [T23][T14]. Metasoma narrowed to apex slightly more than to base [T23].
sculpture
color
♀ ovipositorThe ovipositor is thin, curved, protruding as far as length of the 1st-4th segment of the hind tarsus [T23][T14].
♂ apertureApical abdominal opening reniform, occupying about 1/3 width of abdomen and approximately 1/3 its height, height of opening approximately twice its width [T23]. Apical aperture bean-shaped, 0.3 times the width of the metasoma; its width is approximately twice its height [T14].
other info
distributionDK [FE].
remarks
hosts
figures
fig. 1: part of the fore wing (Tobias 1995)
fig. 2: male metasoma, posterior view (Tobias 1995)
Material. Holotype ♀. 50 km N of Magadan, 18.VII. 1975 (Marshakov). Paratype: 1 ♂, same locality, 13.VII. 1975 (Barkalov).
Description ♀. Length of body 3.1 mm. Base of ocellar triangle greater than distance from posterior ocellus to eye by as much as diameter of ocellus. Distance between posterior ocelli 3 times diameter of ocellus. Longitudinal diameter of eye twice height of cheek and 0.83 width of face. Width of face 1.5 times its height. Segments in apical part of antenna depressed. length of thorax 1.5 times height. Lateral teeth of propodeum broadly rounded. Anterior margin of radial cell 2/3 length of pterostigma, 2nd segment of radial vein half the length of 1st segment, 0.13 length of 3rd segment, and 1/3 length of 1st radiomedial vein. Radial vein runs almost vertically to longitudinal axis of pterostigma. Length of hindfemur 3.5 times width; 5th hindtarsal segment as long as 2nd segment and longer than 3rd segment. Abdomen narrowed to apex slightly more than to base length 1.85 times width. Ovipositor slender, curved, extending as far as length of 1st-4th hindtarsal segments.
Clypeus punctate and shiny.
Legs dark, mostly dark-brown; foretibia, apices of forefemora and midfemora, as well as bases of midtibia yellowish-brown. Wings slightly darkened, with brown pterostigma and veins, basal and mediocubital veins paler.
♂. Length of body 3 mm. Antennae 21-segmented. Apical abdominal opening reniform, occupying about 1/3 width of abdomen and approximately 1/3 its height, height of opening approximately twice its width.
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):
(2.7) 2.7 - 3.2 (3.4)
(2.7) 2.7 - 3.2 (3.4)
number of antennal segments:
16
(20) 20 (22)
head, dorsal view
Head width : length
---
---
Temples narrowing - widening
---
---
Eye length : temple length
---
---
Roundness temple
---
---
POL : OD
2 - 3, 3 - 4
2 - 3, 3 - 4
Ocellar triangle shape
---
---
Excavation of head
---
---
head, lateral view
Head height : length
---
---
Eye height : length
---
---
Temple length : eye length
---
---
head, frontal view
Head width : height
---
---
Face width : height
very narrow
very narrow
Eyes converging ventrally
---
---
EH : MSL
short, long
short, long
Clypeus width : height
---
---
Clypeus extending above bottom of eyes
---
---
Tentorial pits
---
---
Shape of lower margin clypeus
---
---
antennae
Antennal shape
---
filiform, not widened
Segment 3 length : width
---
---
Penultimate segment length : width
---
---
Length of antenna : length of body
---
---
mesosoma, lateral view
Length : height
medium
medium
transverse carina
---
---
lateral teeth
present
present
mesosoma, ventral view
Prepectal carina lamelliform
indistinct
indistinct
legs
Hind femur length : width ratio
medium
medium
Hind tibia length : hind tarsus length ratio
---
---
Hind tibia (longest) spur length : metatars length ratio
wings
Vein 1-R1 length : pterostigma length
medium
medium
Vein r length : vein 3-SR length
long
long
Shape vein SR1 (straight / concave / convex)
straight or S-shaped, slightly convex
straight or S-shaped, slightly convex
S-shape vein SR1
apically convex
not S-shaped
cell M : cell Sm2
Sm2 small
Sm2 small
Pterostigma length : width ratio
medium
medium
Angle between radial vein (r) : vein 1-R1
blunt
blunt
metasoma, dorsal view
Length : width ratio of metasoma
medium
medium
Shape of metasoma
---
---
metasoma, lateral view
Length : height ratio of metasoma
---
---
posterior : anterior height ratio of metasoma
---
---
Position of maximum height
---
---
metasoma, ventral view
Metasoma posteriorly curved forwards
---
---
male apical aperture
Aperture width : metasoma width
no aperture
small, medium
Aperture shape
n. a.
(nearly) round, oval
Median process shape
n. a.
vertical carina
sculpture
head
general coarseness
fine
fine
clypeus
coarseness punctation
punctate
punctate
density punctation
---
---
face
sculpture type
rugose
rugose
sculpture direction
---
---
vertex and temple
sculpture type
---
---
mesonotum
sculpture type
notauli distinct
notauli distinct
scutellum
middle
smooth
smooth
lateral
punctate
punctate
metasoma
base - mid sculpture
---
---
sculpture at apex
---
---
coarse / fine boundary
---
---
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
dark
dark
hind femur color pattern
entirely dark
entirely dark
hind tibia lightest colour
dark
dark
hind tibia color pattern
entirely dark
entirely dark
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
medium 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 verticalis in published keys
T23: Tobias 1995b
Braconid Wasps of Genus Microchelonus, M. contractus (Hymenoptera, Braconidae) from the Russian Far East
T14: Tobias, 2010
Palearctic species of Microchelonus Szépligeti (Hymenoptera: Braconidae, Cheloninae): key to species.
