shapeHead 1.25 times as wide as mesonotum, behind eyes slightly widened or not widened and with rounded genae; width 1.6 times length and 1.15 times height. Temples 1.2 times as long as transverse eye diameter. Base of ocellar triangle greater than distance from it to eye plus one ocellus diameter. Distance between posterior ocelli twice the diameter of an ocellus. Longitudinal diameter of eyes 1.8 times transverse diameter and 4 times malar space. Face width 1.6 times its height. Distance between tentorial pits twice distance from pit to eye [T5][T14].
sculpture
color
antenna
shape ♀Antennae 20-segmented. Length of 3rd segment 3 times width, length of segments in its apical half slightly shorter than their width [T5][T14].
shape ♂Antennae 21-segmented, length of segments in their apical part slightly greater than width [T5].
color
mesosoma
shape♀ Length of mesosoma 1.7 times height. Propodeum with distinct transverse carina. ♂ Length of mesosoma approximately twice height [T5].
sculpture
color
legs
shape
sculpture
colorLegs mostly black. Apex of fore femora, fore tibia, and most of hind tibia brownish yellow. Mid tibia yellowish brown. Apex of hind tibia and all tarsi brown [T5]. Sometimes hind tibiae dark-colored [T14].
wings
shapeMarginal cell 1.5 times 2nd submarginal cell, 1-R1 2/3 length of pterostigma; 3-SR slightly longer than r or as long as r, 1/4 length of SR1, and 2/5 length of 2-SR; SR1 with weak sinuate curve. ♂ 3-SR twice as long as r, 2/5 length of SR1, and 0.63 length of 2-SR [T5]. 1-R1 0.67 times as long as the pterostigma [T14] The anterior margin of the radial cell is distinctly shorter than the pterostigma [T5].
colorWings slightly darkened. Pterostigma and veins brown and in basal half of wing pale brown or yellowish [T5].
metasoma
shape♀ Length of metasoma 2.1-2.2 times width, 3.5 times height in apical 1/3. Apex of metasoma without tooth, but in its place it has weak tubercle or process of sculpturation. ♂ Length of metasoma 2.3 times width [T5][T14].
sculptureMetasoma with numerous, serpentine, strongly anastomosing longitudinal rugae reaching, while becoming slenderer, its posterior 1/3.
color
♀ ovipositorOvipositor hidden [T5].
♂ apertureAAO oval, occupying 0.2 width of metasoma and height 2/3 width [T5].
other info
distributionCZ, SE [FE].
remarks
hosts
figures
fig. 1: head in dorsal view (Tobias 1995a)
fig. 2: apex of antenna of ♀ (Tobias 1995a)
fig. 3: metasoma of ♀ in dorsal view (Tobias 1995a)
fig. 4: apex of metasoma of ♂ in posterior view, at an angle (Tobias 1995a)
Microchelonus (Stylochelonus) koponeni Tobias, sp. n.
Material. Holotype ♀, Sweden, "Vb. Kulbäcksliden, 15.VII.1980, M. Koponen leg." Paratypes: 1 ♀ and 1 ♂, same data. Holotype and paratype (♂) preserved in Department of Agricultural and Forestry Zoology of University of Helsinki, and another paratype is preserved in ZIS.
Description. ♀. Length of body 3.2 mm. Head 1.25 times as wide as mesonotum, behind eyes slightly widened or not widened and with rounded genae; width 1.6 times length and 1.15 times height. Genae 1.2 times as long as eye. Base of oeellar triangle greater than distance from it to eye as much as diameter of ocellus. Distance between posterior ocelli twice diameter of ocellus. Longitudinal diameter of eyes 1.8 times transverse diameter and 4 times height of cheek. Height of face 0.63 width. Distance between tentorial pits twice distance from pit to eye. Antennae 20-segmented. Length of 1st flagellar segment 3 times width, length of segments in its apical half slightly less than their width. Length of mesosoma 1.7 times height. Propodeum with distinct transverse ridge. Radial cell 1.5 times 2nd radiomedial cell, anterior margin 2/3 length of pterostigma; 2nd segment of radial vein slightly longer than 1st segment or as long as 1st segment, 1/4 length of 3rd segment, and 2/5 length of 1st radiomedial vein; 3rd segment with weak sinuate curve. Length of metasoma 2.1-2.2 times width, 3.5 times height in apical 1/3. Apex of metasoma without tooth, but in its place it has weak tubercle or process of sculpturation. Ovipositor hidden.
metasoma with numerous, serpentine, strongly anastomosing longitudinal rugae reaching, becoming slenderer, its posterior 1/3.
Legs mostly black. Apex of forefemora, foretibia, and most of hindtibia brownish yellow. Midtibia yellowish brown. Apex of hindtibia and all tarsi brown. Wings slightly darkened. Pterostigma and veins brown and in basal half of wing pale brown or yellowish
♂. Length of body 3.1 mm. Antennae 21-segmented, length of segments in their apical part slightly greater than width. 2nd segment of radial vein twice as long as 1st segment, 2/5 length of 3rd segment, and 0.63 length of 1st radiomedial vein. Length of metasoma 2.3 times width. AAO oval, occupying 0.2 width of metasoma and height 2/3 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):
(2.8) 2.8 - 3.3 (3.5)
(2.8) 2.8 - 3.3 (3.5)
number of antennal segments:
(19) 19 (21)
(20) 20 (22)
head, dorsal view
Head width : length
narrow
narrow
Temples narrowing - widening
parallel, widening
parallel, widening
Eye length : temple length
<= 0.75, 0.75 - 1.0
<= 0.75, 0.75 - 1.0
Roundness temple
very strong, strong
very strong, strong
POL : OD
<= 2, 2 - 3
<= 2, 2 - 3
Ocellar triangle shape
very narrow
very narrow
Excavation of head
15 - 25%
15 - 25%
head, lateral view
Head height : length
---
---
Eye height : length
very short, short
very short, short
Temple length : eye length
---
---
head, frontal view
Head width : height
very narrow, narrow
very narrow, narrow
Face width : height
very narrow, narrow
very narrow, narrow
Eyes converging ventrally
---
---
EH : MSL
---
---
Clypeus width : height
---
---
Clypeus extending above bottom of eyes
---
---
Tentorial pits
very large
very large
Shape of lower margin clypeus
---
---
antennae
Antennal shape
---
filiform, not widened
Segment 3 length : width
medium
---
Penultimate segment length : width
short
short
Length of antenna : length of body
---
---
mesosoma, lateral view
Length : height
long
long
transverse carina
well developed
well developed
lateral teeth
---
---
mesosoma, ventral view
Prepectal carina lamelliform
indistinct
indistinct
legs
Hind femur length : width ratio
---
---
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
short
short
Shape vein SR1 (straight / concave / convex)
slightly concave, straight or S-shaped, slightly convex
slightly concave, straight or S-shaped, slightly convex
S-shape vein SR1
apically concave, not S-shaped, apically convex
apically concave, not S-shaped, apically convex
cell M : cell Sm2
Sm2 large
Sm2 large
Pterostigma length : width ratio
---
---
Angle between radial vein (r) : vein 1-R1
---
---
metasoma, dorsal view
Length : width ratio of metasoma
long
long
Shape of metasoma
widest towards apex
widest towards apex
metasoma, lateral view
Length : height ratio of metasoma
medium, long
medium, long
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
Aperture shape
n. a.
(nearly) round, oval
Median process shape
n. a.
vertical carina
sculpture
head
general coarseness
---
---
clypeus
coarseness punctation
---
---
density punctation
---
---
face
sculpture type
---
---
sculpture direction
---
---
vertex and temple
sculpture type
---
---
mesonotum
sculpture type
---
---
scutellum
middle
---
---
lateral
---
---
metasoma
base - mid sculpture
longitudinally rugose / rugose-striate
longitudinally rugose / rugose-striate
sculpture at apex
rugulose
rugulose
coarse / fine boundary
mid (50 - 70%)
mid (50 - 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
dark
dark
hind femur color pattern
entirely dark
entirely dark
hind tibia lightest colour
dark, medium light
dark, medium light
hind tibia color pattern
wide light ring, wide light base
wide light ring, wide light base
hind basitarsus lightest colour
medium dark
medium dark
hind tarsus segment 2-3 lightest colour
medium dark
medium 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 koponeni in published keys
T5: Tobias 1995a
A new subgenus and species of the genus microchelonus (hymenoptera, braconidae) with some comments on synonymy.
T14: Tobias, 2010
Palearctic species of Microchelonus Szépligeti (Hymenoptera: Braconidae, Cheloninae): key to species.
