shapeTransversal, roundly narrowed behind eyes, about twice as broad as long. Ocelli small, OOL equals POL. Length of eye 1.7 times transverse diameter and twice length of malar space. Temples 0.9 times as long as transverse diameter of the eye. Face 1.7 times as broad as high, about twice as high as clypeus [LT2].
sculptureHead behind eye weakly transversly striate, face faintly longitudinally striate, frons concentrically striate. Clypeus centrally weakly punctate and shining [LT2].
color
antenna
shape ♀
shape ♂Antennae with 18 segments, slightly longer than head and mesonotum combined; 3rd segment 3 times as long as wide, apical segments about twice as long as wide [LT2][T14].
color
mesosoma
shapeIn dorsal view, as wide as head and a little wider than carapace. In lateral view, 1.6 times as long as high and as long as carapace. Propodeum with distinct transverse carina, lateral tubercles well developed [LT2].
sculptureMesonotum rugose-punctate. Scutum anteriorly punctate and longitudinally striate, area before scutellum with some rugae. Scutellum largely laterally and posteriorly sculptured, centrally punctate and more or less shining. Propodeum rugose [LT2].
color
legs
shapeFore and hind femora 3-3.5 times as long as broad. Hind tibia a little longer than hind femur. Outer spur of hind tibia longer than inner spur and slightly longer than half of 1st metatarsal segment [LT2]. The inner [outer?] spur of the hind tibia is noticeably longer than half of the hind metatarsus [T14].
sculpture
colorAll coxae and femora black; fore tibiae brown, fore [mid?, hind?] tibiae dark; all tarsi dark [LT2].
wings
shapeMarginal cell in forewing not large, 1-R1 0.8 times as long as length of pterostigma. 2nd submarginal cell 0.7 times as large as marginal cell. 3-SR as long as r, 3.5-4 times shorter than SR1 [LT2].
colorForewings slightly infuscate. Pterostigma, R1 and costal vein brown, other veins brown yellowish [LT2].
metasoma
shapeCarapace elongate-oval, 1.8 times as long as maximum breadth, incurved apicoventrally for 0.2 of its length [LT2].
sculptureCarapace granulate with thin longitudinal undulations spanning its 1/2 visible surface [LT2].
color
♀ ovipositor
♂ apertureApereture very small and oval, in rear view of posterior end about 0.15 of width of carapace. Aperture may vary in size from 0.13 to 0.2 of width of carapace (see Figs 4 and 5) [LT2].
Description. Male. Body length of holotype 3.1 mm. Body length of two paratypes 3.0-3.2 mm.
Head. Transversal, roundly narrowed behind eyes, about twice as broad as long. Ocelli small, OOL equals POL. LO 1.7 times as TD and twice length of malar space. Temples 0.9 times as long as LO. Face 1.7 times as broad as high, about twice as high as clypeus. Antennae with 18 segments, slightly longer than head and mesonotum combined; 1st flagellum segment 3 times as long as wide, apical segments about twice as long as wide.
Mesosoma. In dorsal view, as wide as head and a little wider than carapace. In lateral view, 1.6 times as long as high and as long as carapace
Wings. Radial cell in forewing not large, its length along the metacarp 0.8 times as long as length of pterostigma. Second radio-medial cell 0.7 times as large as radial cell. Second radial abscissa as long as first abscissa, 3.5-4 times shorter than third abscissa.
Legs. Fore and hind femora 3-3.5 times as long as broad. Hind tibia a little longer than hind femur. Outer spur of hind tibia longer than inner spur and slightly longer than half of 1st metatarsal segment.
Metasoma. Carapace elongate-oval, 1.8 times as long as maximum breadth, incurved apicoventrally for 0.2 of its length. AMA very small and oval, in rear view of posterior end about 0.15 of width of carapace.
Sculpture. Head behind eye weakly transvcrsly striate, face faintly longitudinally striate, frons concentrically striate. Clypeus centrally weakly punctate and shining. Mesonotum rugose- punctate. Scutum anteriorly punctate and longitudinally striate, area before scutellum with some rugae. Scutellum largely laterally and posteriorly sculptured, centrally punctate and more or less shining. Propodeum rugosed with destinct transverse carina, lateral tubercles well developed. Carapace granulate with thin longitudinal undulations spanning its 1/2 visible surface.
Colour. Body black. Legs: all coxae and femora black; fore tibiae brown, fore tibiae dark; all tarsi dark. Forewings slightly infuscate. Pterostigma, metacarpus and costal vein brown, other veins brown yellowish.
Variability. AMA may vary in size from 0.13 to 0.2 of width of carapace in rear view (see Figs 19 and 20).
Differential diagnosis. It reminds M. luzhetzkji, but differing in shape of head (more transversal in the new species), larger AMA, longer radial cell in forewing, slightly shorter carapace and softer sculpturing
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):
(2.8) 2.8 - 3.2 (3.4)
(2.8) 2.8 - 3.2 (3.4)
number of antennal segments:
16
18
head, dorsal view
Head width : length
wide, very wide
wide, very wide
Temples narrowing - widening
parallel
parallel
Eye length : temple length
1.0 - 1.25
1.0 - 1.25
Roundness temple
strong, medium
strong, medium
POL : OD
> 4
> 4
Ocellar triangle shape
---
---
Excavation of head
25 - 35%
25 - 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
very short
head, frontal view
Head width : height
narrow, wide
narrow, wide
Face width : height
narrow, wide
narrow, wide
Eyes converging ventrally
about parallel, distinctly diverging
about parallel, distinctly diverging
EH : MSL
short
short
Clypeus width : height
semicircular, transverse
semicircular, transverse
Clypeus extending above bottom of eyes
below
below
Tentorial pits
small
small
Shape of lower margin clypeus
convex
convex
antennae
Antennal shape
---
filiform, not widened
Segment 3 length : width
---
medium
Penultimate segment length : width
---
long
Length of antenna : length of body
---
---
mesosoma, lateral view
Length : height
medium, long
medium, long
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
short, medium
short, medium
Hind tibia length : hind tarsus length ratio
---
---
Hind tibia (longest) spur length : metatars length ratio
long
long
wings
Vein 1-R1 length : pterostigma length
medium, long
medium, long
Vein r length : vein 3-SR length
short
short
Shape vein SR1 (straight / concave / convex)
straight or S-shaped
straight or S-shaped
S-shape vein SR1
not S-shaped
not S-shaped
cell M : cell Sm2
Sm2 large, Sm2 medium
Sm2 large, Sm2 medium
Pterostigma length : width ratio
short, medium
short, medium
Angle between radial vein (r) : vein 1-R1
sharp, medium
sharp, medium
metasoma, dorsal view
Length : width ratio of metasoma
short, medium
short, medium
Shape of metasoma
widest in middle
widest in middle
metasoma, lateral view
Length : height ratio of metasoma
short, medium
short, medium
posterior : anterior height ratio of metasoma
medium
medium
Position of maximum height
medium-posterior
medium-posterior, posterior
metasoma, ventral view
Metasoma posteriorly curved forwards
(distinctly) incurved
(distinctly) incurved
male apical aperture
Aperture width : metasoma width
no aperture
small
Aperture shape
n. a.
(nearly) round, oval
Median process shape
n. a.
horizontal, nearly round
sculpture
head
general coarseness
fine
fine
clypeus
coarseness punctation
punctulate
punctulate
density punctation
---
---
face
sculpture type
striate
striate
sculpture direction
transverse-longitudinal
transverse-longitudinal
vertex and temple
sculpture type
striate (striolate), striate-rugulose
striate (striolate), striate-rugulose
mesonotum
sculpture type
---
---
scutellum
middle
punctate
punctate
lateral
rugose / striate
rugose / striate
metasoma
base - mid sculpture
longitudinally rugose / rugose-striate
longitudinally rugose / rugose-striate
sculpture at apex
rugulose
rugulose
coarse / fine boundary
base (to 50%)
base (to 50%)
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
dark
dark
fore femur color pattern
entirely dark
entirely dark
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 vickae in published keys
LT2: Lozan & Tobias, 2005
Species of the Genus Microchelonus Szépligeti, 1908 with Very Small Apical Metasomal Aperture in Males (Hymenoptera: Braconidae: Cheloninae).
T14: Tobias, 2010
Palearctic species of Microchelonus Szépligeti (Hymenoptera: Braconidae, Cheloninae): key to species.